返回值
如果c具有字符图形表示,则此函数返回非零值,否则返回0。
示例
以下示例显示isgraph()函数的用法-
#include <stdio.h>
#include <ctype.h>
int main () {
int var1 = '3';
int var2 = 'm';
int var3 = ' ';
if( isgraph(var1) ) {
printf("var1 = |%c| can be printed\n", var1 );
} else {
printf("var1 = |%c| can't be printed\n", var1 );
}
if( isgraph(var2) ) {
printf("var2 = |%c| can be printed\n", var2 );
} else {
printf("var2 = |%c| can't be printed\n", var2 );
}
if( isgraph(var3) ) {
printf("var3 = |%c| can be printed\n", var3 );
} else {
printf("var3 = |%c| can't be printed\n", var3 );
}
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 = |3| can be printed
var2 = |m| can be printed
var3 = | | can't be printed