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123-396: C99 (previously C9X , formally ISO/IEC 9899:1999 ) is a past version of the C programming language open standard . It extends the previous version ( C90 ) with new features for the language and the standard library , and helps implementations make better use of available computer hardware, such as IEEE 754-1985 floating-point arithmetic , and compiler technology. The C11 version of
246-633: A BASIC interpreter for the device. Gates called MITS and claimed that he had a working interpreter, and MITS requested a demonstration. Allen worked on a simulator for the Altair while Gates developed the interpreter, and it worked flawlessly when they demonstrated it to MITS in March 1975 in Albuquerque, New Mexico . MITS agreed to distribute it, marketing it as Altair BASIC . Gates and Allen established Microsoft on April 4, 1975, with Gates as CEO, and Allen suggested
369-525: A Microsoft operating system or a non-Microsoft operating system. In effect, the royalty payment to Microsoft when no Microsoft product is being used acts as a penalty, or tax, on the OEM's use of a competing PC operating system. Since 1988, Microsoft's use of per processor licenses has increased." Following Bill Gates's internal "Internet Tidal Wave memo" on May 26, 1995, Microsoft began to redefine its offerings and expand its product line into computer networking and
492-448: A call must verify on their respective ends. On October 7, Microsoft acquired Ally.io, a software service that measures companies' progress against OKRs . Microsoft plans to incorporate Ally.io into its Viva family of employee experience products. On January 18, 2022, Microsoft announced the acquisition of American video game developer and holding company Activision Blizzard in an all-cash deal worth $ 68.7 billion. Activision Blizzard
615-452: A certain platform or with a particular compiler, due, for example, to the use of non-standard libraries, such as GUI libraries, or to a reliance on compiler- or platform-specific attributes such as the exact size of data types and byte endianness . In cases where code must be compilable by either standard-conforming or K&R C-based compilers, the __STDC__ macro can be used to split the code into Standard and K&R sections to prevent
738-517: A chain of Microsoft-branded retail stores, and on October 22, 2009, the first retail Microsoft Store opened in Scottsdale, Arizona ; the same day Windows 7 was officially released to the public. Windows 7's focus was on refining Vista with ease-of-use features and performance enhancements, rather than an extensive reworking of Windows. As the smartphone industry boomed in the late 2000s, Microsoft had struggled to keep up with its rivals in providing
861-717: A combination of AI, high-performance computing and quantum computing . The service includes Copilot, a GPT-4 based large language model tool to query and visualize data, write code, initiate simulations, and educate researchers. At a November 2023 developer conference, Microsoft announced two new custom-designed computing chips: The Maia chip, designed to run large language models, and Cobalt CPU, designed to power general cloud services on Azure. On November 20, 2023, Satya Nadella announced that Sam Altman , who had been ousted as CEO of OpenAI just days earlier, and Greg Brockman , who had resigned as president, would join Microsoft to lead
984-515: A completely new user interface with a novel start button , and 32-bit compatibility; similar to NT, it provided the Win32 API. Windows 95 came bundled with the online service MSN , which was at first intended to be a competitor to the Internet, and (for OEMs) Internet Explorer , a Web browser . Internet Explorer has not bundled with the retail Windows 95 boxes, because the boxes were printed before
1107-579: A continued fraction function demonstrates the main features: Footnotes: A standard macro __STDC_VERSION__ is defined with value 199901L to indicate that C99 support is available. As with the __STDC__ macro for C90, __STDC_VERSION__ can be used to write code that will compile differently for C90 and C99 compilers, as in this example that ensures that inline is available in either case (by replacing it with static in C90 to avoid linker errors). Most C compilers provide support for at least some of
1230-452: A day after hosting a Sting concert for 50 people, including Microsoft executives, in Davos , Switzerland. On January 23, 2023, Microsoft announced a new multi-year, multi-billion dollar investment deal with ChatGPT developer OpenAI . In June 2023, Microsoft released Azure Quantum Elements to run molecular simulations and calculations in computational chemistry and materials science using
1353-547: A deluxe version for $ 399.99. Increasingly present in the hardware business following Xbox, Microsoft 2006 released the Zune series of digital media players, a successor of its previous software platform Portable Media Center . These expanded on previous hardware commitments from Microsoft following its original Microsoft Mouse in 1983; as of 2007 the company sold the best-selling wired keyboard ( Natural Ergonomic Keyboard 4000 ), mouse ( IntelliMouse ), and desktop webcam ( LifeCam ) in
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#17328518943841476-469: A graphical extension for MS-DOS , despite having begun jointly developing OS/2 with IBM that August. Microsoft moved its headquarters from Bellevue to Redmond, Washington , on February 26, 1986, and went public on March 13, with the resulting rise in stock making an estimated four billionaires and 12,000 millionaires from Microsoft employees. Microsoft released its version of OS/2 to original equipment manufacturers (OEMs) on April 2, 1987. In 1990,
1599-463: A joint venture with NBC since 1996. On October 1, Microsoft announced its intention to launch a news operation, part of a new-look MSN , with Windows 8 later in the month. On October 26, 2012, Microsoft launched Windows 8 and the Microsoft Surface . Three days later, Windows Phone 8 was launched. To cope with the potential for an increase in demand for products and services, Microsoft opened
1722-519: A major target of the controversy, will leave the company after the acquisition is finalized. The deal was closed on October 13, 2023. In December 2022, Microsoft announced a new 10-year deal with the London Stock Exchange Group for products including Microsoft Azure; Microsoft acquired around 4% of LSEG as part of the deal. In January 2023, CEO Satya Nadella announced Microsoft would lay off some 10,000 employees. The announcement came
1845-611: A mode for the Windows operating system rather than a separate and unique operating system. In March the company also established guidelines that censor users of Office 365 from using profanity in private documents. In April 2018, Microsoft released the source code for Windows File Manager under the MIT License to celebrate the program's 20th anniversary. In April the company further expressed willingness to embrace open source initiatives by announcing Azure Sphere as its own derivative of
1968-555: A modern smartphone operating system, falling behind Apple and Google -sponsored Android in the United States. As a result, in 2010 Microsoft revamped their aging flagship mobile operating system, Windows Mobile , replacing it with the new Windows Phone OS that was released in October that year. It used a new user interface design language, codenamed "Metro", which prominently used simple shapes, typography, and iconography, utilizing
2091-574: A motion-sensing input device made by Microsoft and designed as a video game controller , first introduced in November 2010, was upgraded for the 2013 release of the Xbox One video game console. Kinect's capabilities were revealed in May 2013: an ultra-wide 1080p camera, function in the dark due to an infrared sensor, higher-end processing power and new software, the ability to distinguish between fine movements (such as
2214-587: A new 24/7 cable news channel, MSNBC . Microsoft created Windows CE 1.0 , a new OS designed for devices with low memory and other constraints, such as personal digital assistants . In October 1997, the Justice Department filed a motion in the Federal District Court , stating that Microsoft violated an agreement signed in 1994 and asked the court to stop the bundling of Internet Explorer with Windows. On January 13, 2000, Bill Gates handed over
2337-418: A new advanced AI research team. However, the plan was short-lived, as Altman was subsequently reinstated as OpenAI's CEO and Brockman rejoined the company amid pressure from OpenAI's employees and investors on its board. In March 2024, Inflection AI 's cofounders Mustafa Suleyman and Karen Simonyan announced their departure from the company in order to start Microsoft AI, with Microsoft acqui-hiring nearly
2460-616: A number of "holiday stores" across the U.S. to complement the increasing number of "bricks-and-mortar" Microsoft Stores that opened in 2012. On March 29, 2013, Microsoft launched a Patent Tracker. In August 2012, the New York City Police Department announced a partnership with Microsoft for the development of the Domain Awareness System which is used for Police surveillance in New York City . The Kinect ,
2583-410: A portion if it were to go through. On August 5, 2020, Microsoft stopped its xCloud game streaming test for iOS devices. According to Microsoft, the future of xCloud on iOS remains unclear and potentially out of Microsoft's hands. Apple has imposed a strict limit on " remote desktop clients " which means applications are only allowed to connect to a user-owned host device or gaming console owned by
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#17328518943842706-596: A publishing division named Microsoft Press . Paul Allen resigned from Microsoft in 1983 after developing Hodgkin's lymphoma . Allen claimed in Idea Man: A Memoir by the co-founder of Microsoft that Gates wanted to dilute his share in the company when he was diagnosed with Hodgkin's disease because he did not think that he was working hard enough. Allen later invested in low-tech sectors, sports teams, commercial real estate, neuroscience, private space flight, and more. Microsoft released Windows 1.0 on November 20, 1985, as
2829-452: A record profit in 2007. The European Union imposed another fine of €899 million ($ 1.4 billion) for Microsoft's lack of compliance with the March 2004 judgment on February 27, 2008, saying that the company charged rivals unreasonable prices for key information about its workgroup and backoffice servers. Microsoft stated that it was in compliance and that "these fines are about the past issues that have been resolved". 2007 also saw
2952-443: A rudimentary computer to track and analyze automobile traffic data. Gates enrolled at Harvard University while Allen pursued a degree in computer science at Washington State University , though he later dropped out to work at Honeywell . The January 1975 issue of Popular Electronics featured Micro Instrumentation and Telemetry Systems 's (MITS) Altair 8800 microcomputer, which inspired Allen to suggest that they could program
3075-590: A semicolon; as a side effect of the evaluation, functions may be called and variables assigned new values. To modify the normal sequential execution of statements, C provides several control-flow statements identified by reserved keywords. Structured programming is supported by if ... [ else ] conditional execution and by do ... while , while , and for iterative execution (looping). The for statement has separate initialization, testing, and reinitialization expressions, any or all of which can be omitted. break and continue can be used within
3198-598: A strict "evaluate to type" of the operands. (For gcc , FLT_EVAL_METHOD == 2 is the default on 32 bit x86, and FLT_EVAL_METHOD == 0 is the default on 64 bit x86-64, but FLT_EVAL_METHOD == 2 can be specified on x86-64 with option -mfpmath=387.) Before C99, compilers could round intermediate results inconsistently, especially when using x87 floating-point hardware, leading to compiler-specific behaviour; such inconsistencies are not permitted in compilers conforming to C99 (annex F). The following annotated example C99 code for computing
3321-449: A thumb movement), and determining a user's heart rate by looking at their face. Microsoft filed a patent application in 2011 that suggests that the corporation may use the Kinect camera system to monitor the behavior of television viewers as part of a plan to make the viewing experience more interactive. On July 19, 2013, Microsoft stocks suffered their biggest one-day percentage sell-off since
3444-423: A warning message if a local function was called with the wrong number of arguments, or if different calls to an external function used different numbers or types of arguments. Separate tools such as Unix's lint utility were developed that (among other things) could check for consistency of function use across multiple source files. In the years following the publication of K&R C, several features were added to
3567-584: A warning, then assume int and continue translating the program. C99 introduced several new features, many of which had already been implemented as extensions in several compilers: Parts of the C99 standard are included in the current version of the C++ standard, including integer types, headers, and library functions. Variable-length arrays are not among these included parts because C++'s Standard Template Library already includes similar functionality. A major feature of C99
3690-589: A wide variety of mainframe computers , minicomputers , and microcomputers , including the IBM PC , as its popularity began to increase significantly. In 1983 the American National Standards Institute (ANSI) formed a committee, X3J11, to establish a standard specification of C. X3J11 based the C standard on the Unix implementation; however, the non-portable portion of the Unix C library was handed off to
3813-505: Is US$ 500,000 per year. Some analysts deemed this unthinkable ten years prior, however, as in 2001 then-CEO Steve Ballmer called Linux "cancer". Microsoft planned to launch a preview of Intune for Education "in the coming weeks", with general availability scheduled for spring 2017, priced at $ 30 per device, or through volume licensing agreements. In January 2018, Microsoft patched Windows 10 to account for CPU problems related to Intel's Meltdown security breach . The patch led to issues with
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3936-494: Is an imperative , procedural language in the ALGOL tradition. It has a static type system . In C, all executable code is contained within subroutines (also called "functions", though not in the sense of functional programming ). Function parameters are passed by value, although arrays are passed as pointers , i.e. the address of the first item in the array. Pass-by-reference is simulated in C by explicitly passing pointers to
4059-486: Is an American multinational technology conglomerate headquartered in Redmond, Washington . Founded in 1975, the company became highly influential in the rise of personal computers through software like Windows , and the company has since expanded to Internet services, cloud computing , video gaming and other fields. Microsoft is the largest software maker , one of the most valuable public U.S. companies, and one of
4182-401: Is an informal name for the current major C language standard revision. It was informally known as "C2X" through most of its development. C23 was published in October 2024 as ISO/IEC 9899:2024. The standard macro __STDC_VERSION__ is defined as 202311L to indicate that C23 support is available. C2Y is an informal name for the next major C language standard revision, after C23 (C2X), that
4305-591: Is best known for producing franchises, including but not limited to Warcraft , Diablo , Call of Duty , StarCraft , Candy Crush Saga , Crash Bandicoot , Spyro , Tony Hawk's , Guitar Hero , and Overwatch . Activision and Microsoft each released statements saying the acquisition was to benefit their businesses in the metaverse , many saw Microsoft's acquisition of video game studios as an attempt to compete against Meta Platforms , with TheStreet referring to Microsoft wanting to become "the Disney of
4428-456: Is commonly used on computer architectures that range from the largest supercomputers to the smallest microcontrollers and embedded systems . A successor to the programming language B , C was originally developed at Bell Labs by Ritchie between 1972 and 1973 to construct utilities running on Unix . It was applied to re-implementing the kernel of the Unix operating system. During the 1980s, C gradually gained popularity. It has become one of
4551-541: Is considered one of the Big Five American information technology companies, alongside Alphabet , Amazon , Apple , and Meta . However it has been criticized for its monopolistic practices and the company's software has been criticized for problems with ease of use , robustness , and security . Childhood friends Bill Gates and Paul Allen sought to make a business using their skills in computer programming . In 1972, they founded Traf-O-Data , which sold
4674-497: Is defined as 201112L to indicate that C11 support is available. C17 is an informal name for ISO/IEC 9899:2018, a standard for the C programming language published in June 2018. It introduces no new language features, only technical corrections, and clarifications to defects in C11. The standard macro __STDC_VERSION__ is defined as 201710L to indicate that C17 support is available. C23
4797-516: Is for the most part backward compatible with C90, but is stricter in some ways; in particular, a declaration that lacks a type specifier no longer has int implicitly assumed. A standard macro __STDC_VERSION__ is defined with value 199901L to indicate that C99 support is available. GCC , Solaris Studio , and other C compilers now support many or all of the new features of C99. The C compiler in Microsoft Visual C++ , however, implements
4920-464: Is hoped to be released later in the 2020s decade, hence the '2' in "C2Y". An early working draft of C2Y was released in February 2024 as N3220 by the working group ISO/IEC JTC1/SC22 /WG14. Historically, embedded C programming requires non-standard extensions to the C language to support exotic features such as fixed-point arithmetic , multiple distinct memory banks , and basic I/O operations. In 2008,
5043-440: Is its numerics support, and in particular its support for access to the features of IEEE 754-1985 (also known as IEC 60559) floating-point hardware present in the vast majority of modern processors (defined in "Annex F IEC 60559 floating-point arithmetic"). Platforms without IEEE 754 hardware can also implement it in software. On platforms with IEEE 754 floating point: FLT_EVAL_METHOD == 2 tends to limit
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5166-622: Is now also referred to as C78 . The second edition of the book covers the later ANSI C standard, described below. K&R introduced several language features: Even after the publication of the 1989 ANSI standard, for many years K&R C was still considered the " lowest common denominator " to which C programmers restricted themselves when maximum portability was desired, since many older compilers were still in use, and because carefully written K&R C code can be legal Standard C as well. In early versions of C, only functions that return types other than int must be declared if used before
5289-420: Is sometimes called C90. Therefore, the terms "C89" and "C90" refer to the same programming language. ANSI, like other national standards bodies, no longer develops the C standard independently, but defers to the international C standard, maintained by the working group ISO/IEC JTC1/SC22 /WG14. National adoption of an update to the international standard typically occurs within a year of ISO publication. One of
5412-454: The Department of Justice's Antitrust Division filed a competitive impact statement that said: "Beginning in 1988 and continuing until July 15, 1994, Microsoft induced many OEMs to execute anti-competitive 'per processor licenses. Under a per-processor license, an OEM pays Microsoft a royalty for each computer it sells containing a particular microprocessor, whether the OEM sells the computer with
5535-1000: The IBM PC–compatible operating system market and the office software suite market since the 1990s. Its best-known software products are the Windows line of operating systems , the Microsoft 365 suite of productivity applications, the Azure cloud computing platform, and the Edge web browser. Its flagship hardware products are the Xbox video game consoles and the Microsoft Surface lineup of touchscreen personal computers. Other consumer and enterprise software it produces include Internet search with Bing ; digital services through MSN ; mixed reality through HoloLens ; cloud computing with Azure ; and software development through Visual Studio . Today, Microsoft
5658-578: The IEEE working group 1003 to become the basis for the 1988 POSIX standard. In 1989, the C standard was ratified as ANSI X3.159-1989 "Programming Language C". This version of the language is often referred to as ANSI C , Standard C, or sometimes C89. In 1990 the ANSI C standard (with formatting changes) was adopted by the International Organization for Standardization (ISO) as ISO/IEC 9899:1990, which
5781-574: The International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). C is an imperative procedural language, supporting structured programming , lexical variable scope , and recursion , with a static type system . It was designed to be compiled to provide low-level access to memory and language constructs that map efficiently to machine instructions , all with minimal runtime support . Despite its low-level capabilities,
5904-580: The Linux operating system. In May 2018, Microsoft partnered with 17 American intelligence agencies to develop cloud computing products. The project is dubbed "Azure Government" and has ties to the Joint Enterprise Defense Infrastructure (JEDI) surveillance program. On June 4, 2018, Microsoft officially announced the acquisition of GitHub for $ 7.5 billion, a deal that closed on October 26, 2018. On July 10, 2018, Microsoft revealed
6027-463: The Microsoft Azure virtual machines reliant on Intel's CPU architecture. On January 12, Microsoft released PowerShell Core 6.0 for the macOS and Linux operating systems. In February 2018, Microsoft killed notification support for their Windows Phone devices which effectively ended firmware updates for the discontinued devices. In March 2018, Microsoft recalled Windows 10 S to change it to
6150-569: The Open Networking Foundation started on March 23, 2011. Fellow founders were Google , HPE Networking , Yahoo! , Verizon Communications , Deutsche Telekom and 17 other companies. This nonprofit organization is focused on providing support for a cloud computing initiative called Software-Defined Networking. The initiative is meant to speed innovation through simple software changes in telecommunications networks, wireless networks, data centers, and other networking areas. Following
6273-506: The Surface Go platform to the public. Later in the month, it converted Microsoft Teams to gratis . In August 2018, Microsoft released two projects called Microsoft AccountGuard and Defending Democracy. It also unveiled Snapdragon 850 compatibility for Windows 10 on the ARM architecture . In August 2018, Toyota Tsusho began a partnership with Microsoft to create fish farming tools using
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#17328518943846396-590: The World Wide Web . With a few exceptions of new companies, like Netscape , Microsoft was the only major and established company that acted fast enough to be a part of the World Wide Web practically from the start. Other companies like Borland , WordPerfect , Novell , IBM and Lotus , being much slower to adapt to the new situation, would give Microsoft market dominance. The company released Windows 95 on August 24, 1995, featuring pre-emptive multitasking ,
6519-489: The Xbox Series X and Xbox Series S video game consoles. In February 2021, Microsoft released Azure Quantum for public preview. The public cloud computing platform provides access to quantum software and quantum hardware including trapped ion , neutral atom , and superconducting systems. In April 2021, Microsoft announced it would buy Nuance Communications for approximately $ 16 billion. The acquisition of Nuance
6642-516: The most valuable brands globally. Microsoft was founded by Bill Gates and Paul Allen to develop and sell BASIC interpreters for the Altair 8800 . It rose to dominate the personal computer operating system market with MS-DOS in the mid-1980s, followed by Windows. The company's 1986 initial public offering (IPO) and subsequent rise in its share price created three billionaires and an estimated 12,000 millionaires among Microsoft employees. Since
6765-445: The 1989 standard and to add more extensive support for international character sets. The standard underwent further revision in the late 1990s, leading to the publication of ISO/IEC 9899:1999 in 1999, which was adopted as an ANSI standard in May 2000. The language defined by that version of the standard is commonly referred to as "C99". The international C standard is maintained by the working group ISO/IEC JTC1/SC22 /WG14. C99 is, for
6888-543: The 1990s, it has increasingly diversified from the operating system market. Steve Ballmer replaced Gates as CEO in 2000 which would see the then-largest of Microsoft's corporate acquisitions in Skype Technologies in 2011, and an increased focus on hardware that led to its first in-house PC line, the Surface, in 2012, and the formation of Microsoft Mobile through Nokia . Since Satya Nadella took over as CEO in 2014,
7011-483: The C Standards Committee published a technical report extending the C language to address these issues by providing a common standard for all implementations to adhere to. It includes a number of features not available in normal C, such as fixed-point arithmetic, named address spaces, and basic I/O hardware addressing. C has a formal grammar specified by the C standard. Line endings are generally not significant in C; however, line boundaries do have significance during
7134-449: The C programming language standard, published in 2011, updates C99. After ANSI produced the official standard for the C programming language in 1989, which became an international standard in 1990, the C language specification remained relatively static for some time, while C++ continued to evolve, largely during its own standardization effort. Normative Amendment 1 created a new standard for C in 1995, but only to correct some details of
7257-400: The C standard, C11 , was ratified in 2011. The C standards committee adopted guidelines that limited the adoption of new features that have not been tested by existing implementations. Much effort went into developing a memory model , in order to clarify sequence points and to support threaded programming. C (programming language) C ( pronounced / ˈ s iː / – like
7380-545: The C89 standard and those parts of C99 that are required for compatibility with C++11 . In addition, the C99 standard requires support for identifiers using Unicode in the form of escaped characters (e.g. \u0040 or \U0001f431 ) and suggests support for raw Unicode names. Work began in 2007 on another revision of the C standard, informally called "C1X" until its official publication of ISO/IEC 9899:2011 on December 8, 2011. The C standards committee adopted guidelines to limit
7503-557: The CEO position to Steve Ballmer , an old college friend of Gates and employee of the company since 1980, while creating a new position for himself as Chief Software Architect . Various companies including Microsoft formed the Trusted Computing Platform Alliance in October 1999 to (among other things) increase security and protect intellectual property through identifying changes in hardware and software. Critics decried
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#17328518943847626-648: The Federal Trade Commission examined Microsoft for possible collusion due to the partnership with IBM, marking the beginning of more than a decade of legal clashes with the government. Meanwhile, the company was at work on Microsoft Windows NT , which was heavily based on their copy of the OS/2 code. It shipped on July 21, 1993, with a new modular kernel and the 32-bit Win32 application programming interface (API), making it easier to port from 16-bit (MS-DOS-based) Windows. Microsoft informed IBM of Windows NT, and
7749-477: The Microsoft Azure application suite for Internet of things (IoT) technologies related to water management. Developed in part by researchers from Kindai University , the water pump mechanisms use artificial intelligence to count the number of fish on a conveyor belt , analyze the number of fish, and deduce the effectiveness of water flow from the data the fish provide. The specific computer programs used in
7872-542: The OS/2 partnership deteriorated. In 1990, Microsoft introduced the Microsoft Office suite which bundled separate applications such as Microsoft Word and Microsoft Excel . On May 22, Microsoft launched Windows 3.0 , featuring streamlined user interface graphics and improved protected mode capability for the Intel 386 processor, and both Office and Windows became dominant in their respective areas. On July 27, 1994,
7995-530: The U.S. smartphone market in January 2016 was 2.7%. During the summer of 2015 the company lost $ 7.6 billion related to its mobile-phone business, firing 7,800 employees. In 2015, the construction of a data center in Mecklenburg County , Virginia led to the destruction of a historic African American cemetery despite archeological recommendations for preservation. On March 1, 2016, Microsoft announced
8118-462: The United States. That year the company also launched the Surface "digital table", later renamed PixelSense . Released in January 2007, the next version of Windows, Vista , focused on features, security and a redesigned user interface dubbed Aero . Microsoft Office 2007 , released at the same time, featured a " Ribbon " user interface which was a significant departure from its predecessors. Relatively strong sales of both products helped to produce
8241-484: The ability to detect, decide and engage before the enemy." In November 2018, Microsoft introduced Azure Multi-Factor Authentication for Microsoft Azure. In December 2018, Microsoft announced Project Mu , an open source release of the Unified Extensible Firmware Interface (UEFI) core used in Microsoft Surface and Hyper-V products. The project promotes the idea of Firmware as a Service . In
8364-438: The adoption of new features that had not been tested by existing implementations. The C11 standard adds numerous new features to C and the library, including type generic macros, anonymous structures, improved Unicode support, atomic operations, multi-threading, and bounds-checked functions. It also makes some portions of the existing C99 library optional, and improves compatibility with C++. The standard macro __STDC_VERSION__
8487-428: The aims of the C standardization process was to produce a superset of K&R C, incorporating many of the subsequently introduced unofficial features. The standards committee also included several additional features such as function prototypes (borrowed from C++), void pointers, support for international character sets and locales , and preprocessor enhancements. Although the syntax for parameter declarations
8610-400: The alliance as a way to enforce indiscriminate restrictions over how consumers use software, and over how computers behave, and as a form of digital rights management : for example, the scenario where a computer is not only secured for its owner but also secured against its owner as well. On April 3, 2000, a judgment was handed down in the case of United States v. Microsoft Corp. , calling
8733-416: The basis for several implementations of C on new platforms. In 1978 Brian Kernighan and Dennis Ritchie published the first edition of The C Programming Language . Known as K&R from the initials of its authors, the book served for many years as an informal specification of the language. The version of C that it describes is commonly referred to as " K&R C ". As this was released in 1978, it
8856-482: The company , citing it abused its dominance with the Windows OS, resulting in a judgment of €497 million ($ 613 million) and requiring Microsoft to produce new versions of Windows XP without Windows Media Player : Windows XP Home Edition N and Windows XP Professional N. In November 2005, the company's second video game console, the Xbox 360 , was released. There were two versions, a basic version for $ 299.99 and
8979-531: The company an "abusive monopoly." Microsoft later settled with the U.S. Department of Justice in 2004. On October 25, 2001, Microsoft released Windows XP , unifying the mainstream and NT lines of OS under the NT codebase. The company released the Xbox later that year, entering the video game console market dominated by Sony and Nintendo . In March 2004 the European Union brought antitrust legal action against
9102-593: The company announced it was laying off 1,850 workers, and taking an impairment and restructuring charge of $ 950 million. In June 2016, Microsoft announced a project named Microsoft Azure Information Protection. It aims to help enterprises protect their data as it moves between servers and devices. In November 2016, Microsoft joined the Linux Foundation as a Platinum member during Microsoft's Connect(); developer event in New York. The cost of each Platinum membership
9225-605: The company has changed focus towards cloud computing , as well as its large acquisition of LinkedIn for $ 26.2 billion in 2016. Under Nadella's direction, the company has also expanded its video gaming business to support the Xbox brand, establishing the Microsoft Gaming division in 2022, which is currently the third-largest gaming company in the world by revenue, following the 2023 acquisition of Activision Blizzard for $ 68.7 billion. Microsoft has been market-dominant in
9348-620: The company's war profiteering from a $ 480 million contract to develop virtual reality headsets for the United States Army . On March 26, 2020, Microsoft announced it was acquiring Affirmed Networks for about $ 1.35 billion. Due to the COVID-19 pandemic , Microsoft closed all of its retail stores indefinitely due to health concerns. On July 22, 2020, Microsoft announced plans to close its Mixer service, planning to move existing partners to Facebook Gaming . On July 31, 2020, it
9471-460: The concept of minimalism. Microsoft implemented a new strategy for the software industry, providing a consistent user experience across all smartphones using the Windows Phone OS. It launched an alliance with Nokia in 2011 and Microsoft worked closely with the company to co-develop Windows Phone, but remained partners with long-time Windows Mobile OEM HTC . Microsoft is a founding member of
9594-528: The creation of a multi-core unit at Microsoft, following the steps of server companies such as Sun and IBM. Gates retired from his role as Chief Software Architect on June 27, 2008, a decision announced in June 2006, while retaining other positions related to the company in addition to being an advisor for the company on key projects. Azure Services Platform , the company's entry into the cloud computing market for Windows, launched on October 27, 2008. On February 12, 2009, Microsoft announced its intent to open
9717-480: The end of each expression statement, and the entry to and return from each function call. Sequence points also occur during evaluation of expressions containing certain operators ( && , || , ?: and the comma operator ). This permits a high degree of object code optimization by the compiler, but requires C programmers to take more care to obtain reliable results than is needed for other programming languages. Microsoft Microsoft Corporation
9840-997: The features introduced in C99. Historically, Microsoft has been slow to implement new C features in their Visual C++ tools, instead focusing mainly on supporting developments in the C++ standards. However, with the introduction of Visual C++ 2013 Microsoft implemented a limited subset of C99, which was expanded in Visual C++ 2015. Since ratification of the 1999 C standard, the standards working group prepared technical reports specifying improved support for embedded processing, additional character data types ( Unicode support), and library functions with improved bounds checking . Work continues on technical reports addressing decimal floating point , additional mathematical special functions , and additional dynamic memory allocation functions. The C and C++ standards committees have been collaborating on specifications for threaded programming. The next revision of
9963-643: The features of the more-powerful PDP-11. A significant addition was a character data type. He called this New B (NB). Thompson started to use NB to write the Unix kernel, and his requirements shaped the direction of the language development. Through to 1972, richer types were added to the NB language: NB had arrays of int and char . Pointers, the ability to generate pointers to other types, arrays of all types, and types to be returned from functions were all also added. Arrays within expressions became pointers. A new compiler
10086-473: The function definition; functions used without prior declaration were presumed to return type int . For example: The int type specifiers which are commented out could be omitted in K&;R C, but are required in later standards. Since K&R function declarations did not include any information about function arguments, function parameter type checks were not performed, although some compilers would issue
10209-448: The language was designed to encourage cross-platform programming. A standards -compliant C program written with portability in mind can be compiled for a wide variety of computer platforms and operating systems with few changes to its source code. Since 2000, C has consistently ranked among the top four languages in the TIOBE index , a measure of the popularity of programming languages. C
10332-438: The language, supported by compilers from AT&T (in particular PCC ) and some other vendors. These included: The large number of extensions and lack of agreement on a standard library , together with the language popularity and the fact that not even the Unix compilers precisely implemented the K&R specification, led to the necessity of standardization. During the late 1970s and 1980s, versions of C were implemented for
10455-440: The last version of the operating system; set to be released in the third quarter of 2021. It was released to the general public on October 5, 2021. In September 2021, it was announced that the company had acquired Takelessons, an online platform that connects students and tutors in numerous subjects. The acquisition positioned Microsoft to grow its presence in the market of providing online education to large numbers of people. In
10578-419: The letter c ) is a general-purpose programming language . It was created in the 1970s by Dennis Ritchie and remains very widely used and influential. By design, C's features cleanly reflect the capabilities of the targeted CPUs. It has found lasting use in operating systems code (especially in kernels ), device drivers , and protocol stacks , but its use in application software has been decreasing. C
10701-413: The loop. Break is used to leave the innermost enclosing loop statement and continue is used to skip to its reinitialisation. There is also a non-structured goto statement which branches directly to the designated label within the function. switch selects a case to be executed based on the value of an integer expression. Different from many other languages, control-flow will fall through to
10824-517: The merger of its PC and Xbox divisions, with Phil Spencer announcing that Universal Windows Platform (UWP) apps would be the focus for Microsoft's gaming in the future. On January 24, 2017, Microsoft showcased Intune for Education at the BETT 2017 education technology conference in London . Intune for Education is a new cloud-based application and device management service for the education sector. In May 2016,
10947-487: The metaverse". Microsoft also named Phil Spencer , head of the Xbox brand since 2014, the inaugural CEO of the newly established Microsoft Gaming division, which now houses the Xbox operations team and the three publishers in the company's portfolio (Xbox Game Studios, ZeniMax Media, Activision Blizzard). Microsoft has not released statements regarding Activision's recent legal controversies regarding employee abuse, but reports have alleged that Activision CEO Bobby Kotick ,
11070-422: The most part, backward compatible with C89, but it is stricter in some ways. In particular, a declaration that lacks a type specifier no longer has int implicitly assumed. The C standards committee decided that it was of more value for compilers to diagnose inadvertent omission of the type specifier than to silently process legacy code that relied on implicit int . In practice, compilers are likely to display
11193-425: The most widely used programming languages, with C compilers available for practically all modern computer architectures and operating systems. The book The C Programming Language , co-authored by the original language designer, served for many years as the de facto standard for the language. C has been standardized since 1989 by the American National Standards Institute (ANSI) and, subsequently, jointly by
11316-448: The name "Micro-Soft", short for micro-computer software. In August 1977, the company formed an agreement with ASCII Magazine in Japan, resulting in its first international office of ASCII Microsoft . Microsoft moved its headquarters to Bellevue, Washington , in January 1979. Microsoft entered the operating system (OS) business in 1980 with its own version of Unix called Xenix , but it
11439-411: The next case unless terminated by a break . Expressions can use a variety of built-in operators and may contain function calls. The order in which arguments to functions and operands to most operators are evaluated is unspecified. The evaluations may even be interleaved. However, all side effects (including storage to variables) will occur before the next " sequence point "; sequence points include
11562-419: The operating system to a PDP-11 . The original PDP-11 version of Unix was also developed in assembly language. Thompson wanted a programming language for developing utilities for the new platform. He first tried writing a Fortran compiler, but he soon gave up the idea and instead created a cut-down version of the recently developed systems programming language called BCPL . The official description of BCPL
11685-652: The preprocessing phase. Comments may appear either between the delimiters /* and */ , or (since C99) following // until the end of the line. Comments delimited by /* and */ do not nest, and these sequences of characters are not interpreted as comment delimiters if they appear inside string or character literals. C source files contain declarations and function definitions. Function definitions, in turn, contain declarations and statements . Declarations either define new types using keywords such as struct , union , and enum , or assign types to and perhaps reserve storage for new variables, usually by writing
11808-665: The process fall under the Azure Machine Learning and the Azure IoT Hub platforms. In September 2018, Microsoft discontinued Skype Classic . On October 10, 2018, Microsoft joined the Open Invention Network community despite holding more than 60,000 patents. In November 2018, Microsoft agreed to supply 100,000 Microsoft HoloLens headsets to the United States military in order to "increase lethality by enhancing
11931-408: The recognizable expression and statement syntax of C with underlying type systems, data models, and semantics that can be radically different. The origin of C is closely tied to the development of the Unix operating system, originally implemented in assembly language on a PDP-7 by Dennis Ritchie and Ken Thompson , incorporating several ideas from colleagues. Eventually, they decided to port
12054-513: The release of Windows Phone , Microsoft undertook a gradual rebranding of its product range throughout 2011 and 2012, with the corporation's logos, products, services, and websites adopting the principles and concepts of the Metro design language . Microsoft unveiled Windows 8 , an operating system designed to power both personal computers and tablet computers , in Taipei in June 2011. A developer preview
12177-623: The release of the IBM PC in August 1981. IBM had copyrighted the IBM PC BIOS , so other companies had to reverse engineer it for non-IBM hardware to run as IBM PC compatibles , but no such restriction applied to the operating systems. Microsoft eventually became the leading PC operating systems vendor. The company expanded into new markets with the release of the Microsoft Mouse in 1983, as well as with
12300-479: The risk of rounding errors affecting numerically unstable expressions (see IEEE 754 design rationale ) and is the designed default method for x87 hardware, but yields unintuitive behavior for the unwary user; FLT_EVAL_METHOD == 1 was the default evaluation method originally used in K&;R C , which promoted all floats to double in expressions; and FLT_EVAL_METHOD == 0 is also commonly used and specifies
12423-507: The role of CFO. On February 4, 2014, Steve Ballmer stepped down as CEO of Microsoft and was succeeded by Satya Nadella , who previously led Microsoft's Cloud and Enterprise division. On the same day, John W. Thompson took on the role of chairman, in place of Bill Gates, who continued to participate as a technology advisor. Thompson became the second chairman in Microsoft's history. On April 25, 2014, Microsoft acquired Nokia Devices and Services for $ 7.2 billion. This new subsidiary
12546-407: The same month, Microsoft acquired Australia-based video editing software company Clipchamp . In October 2021, Microsoft announced that it began rolling out end-to-end encryption (E2EE) support for Microsoft Teams calls in order to secure business communication while using video conferencing software. Users can ensure that their calls are encrypted and can utilize a security code that both parties on
12669-903: The same month, Microsoft announced the open source implementation of Windows Forms and the Windows Presentation Foundation (WPF) which will allow for further movement of the company toward the transparent release of key frameworks used in developing Windows desktop applications and software. December also saw the company discontinue the Microsoft Edge project in favor of Chromium backends for their browsers. On February 20, 2019, Microsoft Corp said it will offer its cyber security service AccountGuard to 12 new markets in Europe including Germany, France and Spain, to close security gaps and protect customers in political space from hacking. In February 2019, hundreds of Microsoft employees protested
12792-464: The team finished the Web browser, and instead were included in the Windows 95 Plus! pack. Backed by a high-profile marketing campaign and what The New York Times called "the splashiest, most frenzied, most expensive introduction of a computer product in the industry's history," Windows 95 quickly became a success. Branching out into new markets in 1996, Microsoft and General Electric 's NBC unit created
12915-415: The thing being referenced. C program source text is free-form code. Semicolons terminate statements , while curly braces are used to group statements into blocks . The C language also exhibits the following characteristics: While C does not include certain features found in other languages (such as object orientation and garbage collection ), these can be implemented or emulated, often through
13038-468: The type followed by the variable name. Keywords such as char and int specify built-in types. Sections of code are enclosed in braces ( { and } , sometimes called "curly brackets") to limit the scope of declarations and to act as a single statement for control structures. As an imperative language, C uses statements to specify actions. The most common statement is an expression statement , consisting of an expression to be evaluated, followed by
13161-472: The urging of Alan Snyder and also in recognition of the usefulness of the file-inclusion mechanisms available in BCPL and PL/I . Its original version provided only included files and simple string replacements: #include and #define of parameterless macros. Soon after that, it was extended, mostly by Mike Lesk and then by John Reiser, to incorporate macros with arguments and conditional compilation . Unix
13284-703: The use of external libraries (e.g., the GLib Object System or the Boehm garbage collector ). Many later languages have borrowed directly or indirectly from C, including C++ , C# , Unix's C shell , D , Go , Java , JavaScript (including transpilers ), Julia , Limbo , LPC , Objective-C , Perl , PHP , Python , Ruby , Rust , Swift , Verilog and SystemVerilog (hardware description languages). These languages have drawn many of their control structures and other basic features from C. Most of them also express highly similar syntax to C, and they tend to combine
13407-531: The use on a K&R C-based compiler of features available only in Standard C. After the ANSI/ISO standardization process, the C language specification remained relatively static for several years. In 1995, Normative Amendment 1 to the 1990 C standard (ISO/IEC 9899/AMD1:1995, known informally as C95) was published, to correct some details and to add more extensive support for international character sets. The C standard
13530-407: The user. On September 21, 2020, Microsoft announced its intent to acquire video game company ZeniMax Media , the parent company of Bethesda Softworks , for about $ 7.5 billion, with the deal expected to occur in the second half of 2021 fiscal year. On March 9, 2021, the acquisition was finalized and ZeniMax Media became part of Microsoft's Xbox Game Studios division. The total price of the deal
13653-654: The year 2000, after its fourth-quarter report raised concerns among investors on the poor showings of both Windows 8 and the Surface tablet. Microsoft suffered a loss of more than US$ 32 billion. In line with the maturing PC business, in July 2013, Microsoft announced that it would reorganize the business into four new business divisions, namely Operating systems, Apps, Cloud, and Devices. All previous divisions will be dissolved into new divisions without any workforce cuts. On September 3, 2013, Microsoft agreed to buy Nokia 's mobile unit for $ 7 billion, following Amy Hood taking
13776-528: Was MS-DOS that solidified the company's dominance. IBM awarded a contract to Microsoft in November 1980 to provide a version of the CP/M OS to be used in the IBM Personal Computer (IBM PC). For this deal, Microsoft purchased a CP/M clone called 86-DOS from Seattle Computer Products which it branded as MS-DOS, although IBM rebranded it to IBM PC DOS . Microsoft retained ownership of MS-DOS following
13899-438: Was $ 8.1 billion. On September 22, 2020, Microsoft announced that it had an exclusive license to use OpenAI 's GPT-3 artificial intelligence language generator. The previous version of GPT-3 , called GPT-2 , made headlines for being "too dangerous to release" and had numerous capabilities, including designing websites, prescribing medication, answering questions, and penning articles. On November 10, 2020, Microsoft released
14022-466: Was augmented to include the style used in C++, the K&R interface continued to be permitted, for compatibility with existing source code. C89 is supported by current C compilers, and most modern C code is based on it. Any program written only in Standard C and without any hardware-dependent assumptions will run correctly on any platform with a conforming C implementation, within its resource limits. Without such precautions, programs may compile only on
14145-468: Was completed in March 2022. In 2021, in part due to the strong quarterly earnings spurred by the COVID-19 pandemic , Microsoft's valuation came to nearly $ 2 trillion. The increased necessity for remote work and distance education drove demand for cloud computing and grew the company's gaming sales. On June 24, 2021, Microsoft announced Windows 11 during a Livestream. The announcement came with confusion after Microsoft announced Windows 10 would be
14268-706: Was further revised in the late 1990s, leading to the publication of ISO/IEC 9899:1999 in 1999, which is commonly referred to as " C99 ". It has since been amended three times by Technical Corrigenda. C99 introduced several new features, including inline functions , several new data types (including long long int and a complex type to represent complex numbers ), variable-length arrays and flexible array members , improved support for IEEE 754 floating point, support for variadic macros (macros of variable arity ), and support for one-line comments beginning with // , as in BCPL or C++. Many of these had already been implemented as extensions in several C compilers. C99
14391-511: Was not available at the time, and Thompson modified the syntax to be less 'wordy' and similar to a simplified ALGOL known as SMALGOL. He called the result B , describing it as "BCPL semantics with a lot of SMALGOL syntax". Like BCPL, B had a bootstrapping compiler to facilitate porting to new machines. Ultimately, few utilities were written in B because it was too slow and could not take advantage of PDP-11 features such as byte addressability. In 1971 Ritchie started to improve B, to use
14514-612: Was one of the first operating system kernels implemented in a language other than assembly . Earlier instances include the Multics system (which was written in PL/I ) and Master Control Program (MCP) for the Burroughs B5000 (which was written in ALGOL ) in 1961. In around 1977, Ritchie and Stephen C. Johnson made further changes to the language to facilitate portability of the Unix operating system. Johnson's Portable C Compiler served as
14637-684: Was released on September 13, which was subsequently replaced by a consumer preview on February 29, 2012, and released to the public in May. The Surface was unveiled on June 18, becoming the first computer in the company's history to have its hardware made by Microsoft. On June 25, Microsoft paid US$ 1.2 billion to buy the social network Yammer . On July 31, they launched the Outlook.com webmail service to compete with Gmail . On September 4, 2012, Microsoft released Windows Server 2012 . In July 2012, Microsoft sold its 50% stake in MSNBC, which it had run as
14760-587: Was released, with its server sibling, Windows Server 2016 , released in September 2016. In Q1 2015, Microsoft was the third-largest maker of mobile phones , selling 33 million units (7.2% of all). While a large majority (at least 75%) of them do not run any version of Windows Phone — those other phones are not categorized as smartphones by Gartner – in the same timeframe 8 million Windows smartphones (2.5% of all smartphones) were made by all manufacturers (mostly Microsoft). Microsoft's share of
14883-425: Was renamed Microsoft Mobile Oy. On September 15, 2014, Microsoft acquired the video game development company Mojang , best known for Minecraft , for $ 2.5 billion. On June 8, 2017, Microsoft acquired Hexadite , an Israeli security firm, for $ 100 million. On January 21, 2015, Microsoft announced the release of their first Interactive whiteboard , Microsoft Surface Hub . On July 29, 2015, Windows 10
15006-571: Was reported that Microsoft was in talks to acquire TikTok after the Trump administration ordered ByteDance to divest ownership of the application to the U.S. On August 3, 2020, after speculation on the deal, Donald Trump stated that Microsoft could buy the application, however, it should be completed by September 15, 2020, and that the United States Department of the Treasury should receive
15129-469: Was written, and the language was renamed C. The C compiler and some utilities made with it were included in Version 2 Unix , which is also known as Research Unix . At Version 4 Unix , released in November 1973, the Unix kernel was extensively re-implemented in C. By this time, the C language had acquired some powerful features such as struct types. The preprocessor was introduced around 1973 at
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