day find

#include<stdio.h>
main()
{ int y; /* year */
 int m; /* month */
 int d;/* date (day) */
 int y1=2015;/*  present year */
 int age;

  int newdate; /* day of the week */
   printf("Please enter the year :\n");
    scanf("%d", &y);
printf("Enter the number of the month:\n");
scanf("%d", &m);
if (m < 3)
{ m = m + 12; y = y - 1; }
 printf("Enter the date: \n");
 scanf("%d", &d);
 newdate = (d + (2 * m) + ((6 * (m + 1)) / 10) + y + (y / 4) -(y / 100) + (y / 400) + 1) % 7;
  switch (newdate)
  { case 0:
  { puts("The day is Sunday.");
   break; }
   case 1: { puts("The day is Monday.");
break; }
case 2: { puts("The day is Tuesday.");
 break; }
  case 3: { puts("The day is Wednesday.");
   break; }
case 4: { puts("The day is Thursday.");
break; }
case 5: { puts("The day is Friday.");
 break; }
  case 6: { puts("The day is Saturday.");
  break; }
  default: { puts("You goofed!");
   }
      }
age = y1-d;
printf("yur age is ");
scanf("%d",&age);
 return 0;
 }