C语言判断是偶数或奇数的程序

#include <stdio.h>

int main() {
   int even = 24;
   int odd  = 31;

   if (even % 2 == 0)
      printf("%d is even\n", even);

   if (odd % 2 != 0 )
      printf("%d is odd\n", odd);

   return 0;
}