C Tutorial/ctype.h/isprint
isprint
Item Value Header file ctype.h Declaration int isprint(int ch); Return returns nonzero if ch is a printable character, including a space; otherwise zero is returned.
In ASCII code, printable characters are in the range 0x20 through 0x7E.
#include <ctype.h>
#include <stdio.h>
int main(void)
{
char ch;
for(;;) {
ch = getchar();
if(isprint(ch)){
printf("%c is printable\n",ch);
}
if(ch == "."){
break;
}
}
return 0;
}