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C ctype isblank() 函数

❮ C ctype 库


示例

检查字符是否为空格或制表符

char c = ' ';
if (isblank(c)) {
  printf("%c is a blank character", c);
} else {
  printf("%c is not a blank character", c);
}
自己试试 »

定义和用法

如果字符为空格(空白)或制表符,则 isblank() 函数返回一个非零值(等效于布尔值 *true*)。

isblank() 函数在 <ctype.h> 头文件中定义。


语法

int isblank(int c);

参数值

参数 描述
c 必需。字符的 ASCII 值或实际字符

技术细节

返回 如果字符为空格或制表符,则返回一个非零的 int 值(等效于布尔值 *true*)。

否则它返回 0(等效于布尔值 *false*)。

❮ C ctype 库

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