Write a Program that inputs a date month a day and a year Sh

Write a Program that inputs a date (month, a day and a year). Show a menu with 3 different options to retrieve your info by month, by day or by year. Use Functions.

Solution

#include<stdio.h>

#include<conio.h>

#include<math.h>

int fm(int date, int month, int year) {

   int fmonth, leap;

     if ((year % 100 == 0) && (year % 400 != 0))

      leap = 0;

   else if (year % 4 == 0)

      leap = 1;

   else

      leap = 0;

   fmonth = 3 + (2 - leap) * ((month + 2) / (2 * month))

         + (5 * month + month / 9) / 2;

   fmonth = fmonth % 7;

   return fmonth;

}

int day_of_week(int date, int month, int year) {

   int dayOfWeek;

   int YY = year % 100;

   int century = year / 100;

   printf(\"\ Date: %d/%d/%d \ \", date, month, year);

   dayOfWeek = 1.25 * YY + fm(date, month, year) + date - 2 * (century % 4);

     dayOfWeek = dayOfWeek % 7;

   switch (dayOfWeek) {

      case 0:

         printf(\"weekday = Saturday\");

         break;

      case 1:

         printf(\"weekday = Sunday\");

         break;

      case 2:

         printf(\"weekday = Monday\");

         break;

      case 3:

         printf(\"weekday = Tuesday\");

         break;

      case 4:

         printf(\"weekday = Wednesday\");

         break;

      case 5:

         printf(\"weekday = Thursday\");

         break;

      case 6:

         printf(\"weekday = Friday\");

         break;

      default:

         printf(\"Incorrect data\");

   }

   return 0;

}

int main() {

   int date, month, year;

   printf(\"\ Enter the year \");

   scanf(\"%d\", &year);

   printf(\"\ Enter the month \");

   scanf(\"%d\", &month);

   printf(\"\ Enter the date \");

   scanf(\"%d\", &date);

   day_of_week(date, month, year);

   return 0;

}