#include stdio.h#include ctype.hint main () {int var1 = 3;int var2 = m;

编程学习网为您整理以下代码实例，主要实现：C语言isgraph()库函数，希望可以帮到各位朋友。

#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);
}