/*Program to determine if a year is a leap year or not*/
/*Date : 30:11:98*/
main()
{
 int year,x;
 clrscr();
 x=1;
 while(x!=0)
 {
  clrscr();
  printf("\n");
  printf("\n\t\tThis program will help you to determine whether a given year is\n\t\ta leap year or not.\n\n\t\tType 1 to Continue ; Type 0 to Exit --> ");
  scanf("%d",&x);
  switch(x)
  {
   case 1: printf("\n\n\t\tEnter the Year : ");
	   scanf("%d",&year);
	   if((year>9999)||(year<0))
	   {
		clrscr();
		printf("\n\n\n\n\n\n\n\t\t\t\t  INPUT ERROR !\n\n\t\tThe program doesnot allow poly-digital year input !\n\n\n\t\t         Press any key to try again......");
		getch();
		break;
	   }
	   if(year%100==0)
	   {
	   if(year%400==0)
		printf("\n\n\t\tThe year %d is a leap year.",year);
	   else
		printf("\n\n\t\tThe year %d is not a leap year.",year);
	   }
	   else
	   {
	   if(year%4==0)
		printf("\n\n\t\tThe year %d is a leap year.",year);
	   else
		printf("\n\n\t\tThe year %d is not a leap year.",year);
	   }
	   printf("\n\n\n\t\tPress any key to continue......");
	   getch();
	   break;
   case 0: clrscr();
	   printf("\n\n\n\n\n\n\n\n\n\t\t\t\tPROGRAM TERMINATED !\n\n\t\t    Press any key to return to source file......");
	   getch();
	   break;
   default:clrscr();
	   printf("\n\n\n\n\n\n\n\n\n\t\t\t\tINVALID INPUT !\n\n\t\t\tPress any key to try again......");
	   getch();
	   break;
  }
 }
}