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C ctype isprint() 函数

❮ C ctype 库


示例

检查字符是否可打印

char c = 'A';
if (isprint(c)) {
  printf("%c is printable", c);
} else {
  printf("%c is not printable", c);
}
自己尝试 »

定义和用法

如果字符是可打印的,则 isprint() 函数返回非零值(相当于布尔值 *true*)。可打印字符是任何具有图形表示的字符以及空格字符。

isprint() 函数在 <ctype.h> 头文件中定义。


语法

int isprint(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

返回值 一个 int 值,如果字符是可打印字符,则为非零值(相当于布尔值 *true*)。

否则返回 0(相当于布尔值 *false*)。

❮ C ctype 库

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