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

int ReadValue(int maximum) {
  int value = 0;
  while (value < 1 || value > maximum) {
    printf("Enter a value between 1 and %d:", maximum);
    scanf("%d", &value);
  }
  return value;
}

int main() {
  int day = ReadValue(31);
  int month = ReadValue(12);
  printf("You entered %d of %d\n", day, month);
  return EXIT_SUCCESS;
}