返回值
如果c是可打印字符,则此函数返回非零值(true),否则返回零(false)。
示例
以下示例显示isprint()函数的用法-
#include <stdio.h>
#include <ctype.h>
int main () {
int var1 = 'k';
int var2 = '8';
int var3 = '\t';
int var4 = ' ';
if( isprint(var1) ) {
printf("var1 = |%c| can be printed\n", var1 );
} else {
printf("var1 = |%c| can't be printed\n", var1 );
}
if( isprint(var2) ) {
printf("var2 = |%c| can be printed\n", var2 );
} else {
printf("var2 = |%c| can't be printed\n", var2 );
}
if( isprint(var3) ) {
printf("var3 = |%c| can be printed\n", var3 );
} else {
printf("var3 = |%c| can't be printed\n", var3 );
}
if( isprint(var4) ) {
printf("var4 = |%c| can be printed\n", var4 );
} else {
printf("var4 = |%c| can't be printed\n", var4 );
}
return(0);
}
尝试一下
让我们编译并运行上述程序,以产生以下结果-
var1 = |k| can be printed
var2 = |8| can be printed
var3 = | | can't be printed
var4 = | | can be printed