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Key People:Richard StallmanKenneth Lane ThompsonDennis M. Ritchie...(Show more)Related Topics:computer programming languageprocedural language...(Show more)
C, computer programming language developed in the early 1970s by American computer scientist Dennis M. Ritchie at Bell Laboratories (formerly AT&T Bell Laboratories). C was designed as a minimadanh mục language khổng lồ be used in writing operating systems for minicomputers, such as the DEC PDP. 7, which had very limited memories compared with the mainframe computers of the period. The language was devised during 1969–73, alongside the early development of the UNIX operating system. It was based on CPL (Combined Programming Language), which had been first condensed inlớn the B programming language—a stripped-down computer programming language—created in 1969–70 by Ken Thompson, an American computer scientist và a colleague of Ritchie. Ritchie subsequently rewrote & restored features from CPL to lớn create C and eventually rewrote the UNIX operating system in the new language.
As the UNIX system was enhanced, a series of changes took place in C between 1977 & 1979. During this time a mô tả tìm kiếm of the language became widely available through a book, The C Programming Language (1978), by Brian W. Kernighan & Ritchie. In the mid-1980s it became important to lớn establish an official standard for C, since it was being used in projects subject lớn commercial và government contracts. In 1983 the American National Standards Institute (ANSI) set up a committee that further amended & standardized the language. Since then C has been referred to as ANSI Standard C, & it remains popular in the world of UNIX-like operating systems. C also became one of the most common programming languages used for writing other system software và applications. Descendants of C include Concurrent C, Objective sầu C, C*, C#, & the widely used C++. The programming language Java was introduced in 1994 as a simplified subphối of C for deployment over the Internet và for use in portable devices with limited memory or limited processing capabilities.
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The Editors of Encyclopaedia taikinh.vnThis article was most recently revised và updated by Erik Gregersen.