C/ctype.h/isgraph

int isgraph(int ch)

<source lang="cpp">

//Declaration: int isgraph(int ch); //Return: returns nonzero if ch is a printable character other than space or zero is returned.

 #include <ctype.h>
 #include <stdio.h>
 int main(void)
 {
   char ch;
   for(;;) {
     ch = getchar();
     if(isgraph(ch)){
        printf("%c is printable\n", ch);
     }
     if(ch == "."){
        break;
     }
   }
   return 0;
 }
        

/* 1 1 is printable 2 2 is printable 3 3 is printable 4 4 is printable . . is printable

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      </source>