Development of C language standard

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Team blog : CSDN AI team

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c The development of language standards is mainly divided into the following stages ：

K&R C

1978 year , Dennis · Ricci (Dennis Ritchie) Blaine · Cornegan (Brian Kernighan) Published a Book , named 《The C Programming Language》. The book was C Language developers call it “K&R”, For many years, it was regarded as C Informal Standard Specification of language . People call this version C The language is “K&R C”.

C89

For unity C Language version ,1983 The National Bureau of standards （American National Standards Institute, abbreviation ANSI） A committee was set up , To make C Language standards .1989 year C Language standards are approved , go by the name of ANSI X3.159-1989 “Programming Language C”. This version of C Language standards are often called ANSI C. And because this version is 89 Completed in , So it's also called C89.

C90

later ANSI Submit this standard to ISO（ International standards organization ）,1990 By the ISO Adopt as an international standard , be called ISO C. And because this version is 1990 Published in , So it's also called C90. therefore ANSI C、ISO C、C89、C90 this 4 The contents of the two standards are actually the same .

C99

stay ANSI C After the standards are established ,C The norms of language haven't changed much for a long time .1995 year C The programming language working group is interested in C There have been some changes to the language , Become later 1999 Published in ISO/IEC 9899:1999 standard , It's usually called C99. But companies are very interested in C99 The support of people shows different interests . When GCC And some other commercial compilers support C99 Most of the features of , Microsoft and Borland But it doesn't seem to be interested in it .

C11

stay 2011 year 12 month ,ANSI Adopted ISO/IEC 9899:2011 standard , This criterion is usually C11.

C18

2018 year 6 Released on ISO/IEC 9899:2018 standard , This standard is called C18, It's up to date C Language programming standards , This standard is mainly for C11 Supplemented and amended , No new language features have been introduced .

C2x

The next version of C Language standards , It is expected that 2022 year 12 month 1 Day to complete .

Reference resources

C (programming language)
The Standard