/* Checks whether a text file contains characters in the
   octal range 200 to 237, and reports the occurrences
   (and returns EXIT_FAILURE) if it does. */

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
int found = 0;
int line = 1;
int ch;
while( (ch=getchar()) != EOF)
  if(ch == '\n')
    line++;
  else if(ch >= 0200 && ch <= 0237)
    {
    found = 1;
    fprintf(stderr, "Illegal character (octal %o) at line %d.\n",
	    ch, line);
    }
return found == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}