ispunct
来自cppreference.com
| 定义于头文件 <ctype.h>
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| int ispunct( int ch ); |
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检查给定的字符是否为当前 C 本地环境分类为标点字符。默认 C 本地环境分类字符 !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~ 为标点。
若 ch 的值不能表示为 unsigned char 且不等于 EOF ，则行为未定义。
参数
| ch | - | 要分类的字符 |
返回值
若字符为标点字符则为非零值，否则为零。
示例
运行此代码
#include <stdio.h> #include <ctype.h> #include <locale.h> int main(void) { unsigned char c = '\xd7'; // ISO-8859-1的字符×（乘号） printf("In the default C locale, \\xd7 is %spunctuation\n", ispunct(c) ? "" : "not " ); setlocale(LC_ALL, "en_GB.iso88591"); printf("In ISO-8859-1 locale, \\xd7 is %spunctuation\n", ispunct(c) ? "" : "not " ); }
输出：
In the default C locale, \xd7 is not punctuation In ISO-8859-1 locale, \xd7 is punctuation
引用
- C11 standard (ISO/IEC 9899:2011):
- 7.4.1.9 The ispunct function (p: 202)
- C99 standard (ISO/IEC 9899:1999):
- 7.4.1.9 The ispunct function (p: 183)
- C89/C90 standard (ISO/IEC 9899:1990):
- 4.3.1.8 The ispunct function
参阅
| (C95) |
检查宽字符是否为标点符号 (函数) |
| ASCII值 (十六进制) |
字符 |
ispunct |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 - 8 | 0x00-0x08
|
控制码 (NUL等)
|
≠0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| 9 | 0x09
|
制表符 (\t)
|
≠0
|
0
|
≠0
|
≠0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| 10 - 13 | 0x0A-0x0D
|
空白符 (\n, \v, \f, \r)
|
≠0
|
0
|
≠0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| 14 - 31 | 0x0E-0x1F
|
控制码 | ≠0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| 32 | 0x20
|
空格 | 0
|
≠0
|
≠0
|
≠0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| 33 - 47 | 0x21-0x2F
|
!"#$%&'()*+,-./
|
0
|
≠0
|
0
|
0
|
≠0
|
≠0
|
0
|
0
|
0
|
0
|
0
|
0
|
| 48 - 57 | 0x30-0x39
|
0123456789
|
0
|
≠0
|
0
|
0
|
≠0
|
0
|
≠0
|
0
|
0
|
0
|
≠0
|
≠0
|
| 58 - 64 | 0x3a-0x40
|
:;<=>?@
|
0
|
≠0
|
0
|
0
|
≠0
|
≠0
|
0
|
0
|
0
|
0
|
0
|
0
|
| 65 - 70 | 0x41-0x46
|
ABCDEF
|
0
|
≠0
|
0
|
0
|
≠0
|
0
|
≠0
|
≠0
|
≠0
|
0
|
0
|
≠0
|
| 71 - 90 | 0x47-0x5A
|
GHIJKLMNOPQRSTUVWXYZ
|
0
|
≠0
|
0
|
0
|
≠0
|
0
|
≠0
|
≠0
|
≠0
|
0
|
0
|
0
|
| 91 - 96 | 0x5B-0x60
|
[\]^_`
|
0
|
≠0
|
0
|
0
|
≠0
|
≠0
|
0
|
0
|
0
|
0
|
0
|
0
|
| 97 -102 | 0x61-0x66
|
abcdef
|
0
|
≠0
|
0
|
0
|
≠0
|
0
|
≠0
|
≠0
|
0
|
≠0
|
0
|
≠0
|
| 103-122 | 0x67-0x7A
|
ghijklmnopqrstuvwxyz
|
0
|
≠0
|
0
|
0
|
≠0
|
0
|
≠0
|
≠0
|
0
|
≠0
|
0
|
0
|
| 123-126 | 0x7B-0x7E
|
{|}~
|
0
|
≠0
|
0
|
0
|
≠0
|
≠0
|
0
|
0
|
0
|
0
|
0
|
0
|
| 127 | 0x7F
|
退格符 (DEL)
|
≠0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
