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C 字符串 strcspn() 函数

❮ 字符串函数


示例

测量字符串的长度,直到第一个标点符号

char myStr[] = "Learn C++, Java and Python!";
int pos = strcspn(myStr, ",.!?");
printf("%d", pos);
亲自尝试 »

定义和用法

The strcspn() 函数在字符串中搜索指定字符集中的第一个出现的字符,并返回到该字符位置之前的字符串长度。如果未找到任何字符,则返回字符串长度。

The strcspn() 函数在 <string.h> 头文件中定义。


语法

strcspn(void * str, void * search);

参数值

参数 描述
str 必需。要搜索的字符串。
search 必需。包含要搜索的字符集的字符串。

技术细节

返回值 一个整数,表示搜索字符集中的第一个字符出现的第一个位置,如果未找到任何字符,则表示字符串的长度。

❮ 字符串函数


相关页面

C 字符串教程

C 字符串函数教程


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