c - ANSI C 和 ISO C 之间有什么区别吗？

Question

我知道 C 有 ANSI 标准和 ISO 标准。这两个标准之间有什么区别吗？如果有，它们是什么？如果没有区别，那么有两个标准有什么意义？

Answer 1

In 1990, the ANSI C standard (with a few minor modifications) was adopted by the International Organization for Standardization as ISO/IEC 9899:1990. This version is sometimes called C90. Therefore, the terms "C89" and "C90" refer to essentially the same language.

Source ，情况类似但相反 C99 .还有一个C FAQ entry关于这件事。

存在两个标准的原因很简单:ANSI 是北美标准机构，而 ISO 是国际标准机构。