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Programming in C. S. G. Kochan

The C programming language was pioneered by Dennis Ritchie at AT&T Bell Laboratories in the early 1970s. It was not until the late 1970s, however, that this programming language began to gain widespread popularity and support.This was because until that time C compilers were not readily available for commercial use outside of Bell Laboratories. Initially, C’s growth in popularity was also spurred on in part by the equal, if not faster, growth in popularity of the Unix operating system.

Владимир Петров

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This operating system, which was also developed at Bell Laboratories, had C as its “standard” programming language. In fact, well over 90% of the operating system itself was written in the C language!

The enormous success of the IBM PC and its look-alikes soon made MS-DOS the most popular environment for the C language.As C grew in popularity across different operating systems, more and more vendors hopped on the bandwagon and started marketing their own C compilers.

For the most part, their version of the C language was based on an appendix found in the first C programming text—The C Programming Language—by Brian Kernighan and Dennis Ritchie. Unfortunately, this appendix did not provide a complete and unambiguous definition of C, meaning that vendors were left to interpret some aspects of the language on their own.

In the early 1980s, a need was seen to standardize the definition of the C language. The American National Standards Institute (ANSI) is the organization that handles such things, so in 1983 an ANSI C committee (called X3J11) was formed to standardize C. In 1989, the committee’s work was ratified, and in 1990, the first official ANSI standard definition of C was published.

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