Program to find out first day of the input year : Logic building (3)

      int dayNum;

      int leapYear4, leapYear100, leapYear400;

      int inputYear;

     

      scanf("%d",&inputYear);

      leapYear4 = (inputYear - 1)/4;

      leapYear100 = (inputYear - 1)/100;

      leapYear400 = (inputYear - 1)/400;

      dayNum = (inputYear + leapYear4 - leapYear100 + leapYear400) %7;

      switch (dayNum)

      {

            case 1 :

                  printf("Monday");

                  break;

                 

            case 2 :

                  printf("Tuesday");

                  break;

            case 3 :

                 

                  printf("Wednesday");

                  break;

            case 4 :

                 

                  printf("Thursday");

                  break;

            case 5 :

                  printf("Friday");

                  break;

            case 6 :

                  printf("Saturday");

                  break;

            case 0 :

                  printf("Sunday");

                  break;

      }