#include <stdio.h>

int year = 0;
int month = 0;
int day;

void calcEaster() {
      int a = year % 19;
      int b = year / 100;
      int c = year % 100;
      int d = b / 4;
      int e = b % 4;
      int f = (b + 8)/25;
      int g = (b - f + 1)/3;
      int h = (19 * a + b - d - g + 15) % 30;
      int i = c / 4;
      int k = c % 4;
      int l = (32 + 2 * e + 2 * i - h - k) % 7;
      int m = (a + 11 * h + 22 * l) / 451;
      int p = (h + l - 7 * m + 114) % 31;
      // now set globals
      month = (h + l - 7 * m + 114) / 31;
      day = p + 1;
  }

int main(void)
{
	char response = 'y';
	while(1)
	{
		printf("enter a year -> ");
		scanf("%d", &year);
		calcEaster();
		printf("Easter = %d/%d/%d\n", month, day, year);
		printf("again?(y/n) ");
		getchar(); // flush \n
		response = getchar();
		if (response == 'n') break;
	}
	printf("bye\n");
}