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.
<source lang="cpp">#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; }</source>