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C standards

C (and C++) standards (as also C++ standards) are usually named after the year in which they were published.

For example C++98 was published in 1998.

C89/C90

The gcc option -std=c89 or -ansi enforces this standard.

Because this standard was ratified in 1990, it occasinally is referred to as C90.

Amendment 1 to C90 introduced wmemcpy.

C94/C95/AMD1

AMD1 is an amendment to the C89/C90 standard:

digraphs
Introduction of __STDC_VERSION__

C99

A new standard

Apparently, C99 introduced among others

bool (<stdbool.h>)
int32_t etc. (<stdint.h>)
for (int i = …) {}
snprintf (see printf family).
C++ like one line comments (//)

C11

<threads.h>

gets() (already deprecated in C99) replaced with gets_s() because of security issues.

C17

C17 is the same as C11 apart from corrections of defects.

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/developm...', 1758199477, '216.73.216.150', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/development/languages/C-C-plus-plus/C/standards/index(83): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78

C standards

C89/C90

C94/C95/AMD1

C99

C11

C17

See also