1#include <stdlib.h>
2#include <ctype.h>
3
4int main ()
5{
6  char* buf = "hello";
7  return ! ((toupper (buf[0]) == 'H' && toupper ('z') == 'Z' &&
8             tolower (buf[4]) == 'o' && tolower ('X') == 'x' &&
9             isdigit (buf[3])) == 0 && isalnum ('4'));
10}
11