c - isblank 检测到哪些 ANSI 字符？

Question

正如主题所说 - 对于哪些字符 isblank(int c) 返回 true ？

在 SO 上没有找到关于该函数的任何条目。

Answer 1

除非您已将当前语言环境设置为 "C" 以外的其他设置, 它只会为 ' ' 返回 true和 '\t '.

N1570 :

7.4.1.3 The isblank function

...
2 The isblank function tests for any character that is a standard blank character or is oneof a locale-specific set of characters for which isspace is true and that is used toseparate words within a line of text. The standard blank characters are the following:space ( ' '), and horizontal tab ( '\t'). In the "C" locale, isblank returns true onlyfor the standard blank characters.