made 4 u . COM

CALENDAR PROGRAM

/*calendar*/
#include
int getNumberOfDays(int month,int year)

{
   switch(month)

   {
      case 1 : return(31);

      case 2 : if(year%4==0)

		 return(29);

	       else

		 return(28);

      case 3 : return(31);

      case 4 : return(30);

      case 5 : return(31);

      case 6 : return(30);

      case 7 : return(31);

      case 8 : return(31);

      case 9 : return(30);

      case 10: return(31);

      case 11: return(30);

      case 12: return(31);

      default: return(-1);

   }

}
char *getName(int odd)
{
 
  switch(odd)

   {
      case 0 :return("Sunday");

      case 1 :return("Monday");

      case 2 :return("Tuesday");

      case 3 :return("Wednesday");

      case 4 :return("Thursday");

      case 5 :return("Friday");

      case 6 :return("Saturday");

      default:return("Error in getName() module.Invalid argument passed");

   }
}
int getOddNumber(int day,int mon,int year)
{
 
  int res=0,t1,t2,y=year;
   
year = year-1600;
   while(year>=100)
 
  {
       res=res+5;

       year=year-100;

   }
   res=(res%7);
 
  t1=((year-1)/4);

   t2=(year-1)-t1;

   t1=(t1*2)+t2;

   t1=(t1%7);

   res = res+t1;

   res=res%7;

   t2=0;

   for(t1=1;t1
   {
      t2+=getNumberOfDays(t1,y);
   
}
   t2 = t2+day;

   t2 = t2%7;

   res = res+t2;

   res = res%7;

   if(y>2000)

     res=res+1;

   res = res%7;

   return res;

}
char *getWeek(int dd,int mm,int yy)

{
   int odd;
   if(!(mm>=1 && mm<=12))

   {
      return("Invalid month value");

   }
   if(!(dd>=1 && dd<=getNumberOfDays(mm,yy)))

   {
      return("Invalid date");

   }
   if(yy>=1600)

   {
     odd = getOddNumber(dd,mm,yy);

     odd=odd%7;

     return(getName(odd));

   }
   else

   {
      return("
Please give year more than 1600");

   }
}
void printMonth(int mon,int year,int x,int y)

{
   int nod,odd,cnt,d=1,x1=x,y1=y;

   if(!(mon>=1 && mon<=12))

   {
       printf("
INVALID MONTH");

       getch()

       return;

   }
   if(!(year>=1600))

   {
      printf("
INVALID YEAR");

      return;
   }

   if(x<=0)

     x=wherex();

   if(y<=0)

     y=wherey();

   gotoxy(x,y);

   textcolor(RED);

   cprintf("S");

   textcolor(YELLOW);

   cprintf("   M   T   W   T   F   S");

   /*       1234567891234567891234567 */

   textcolor(7);

   cprintf("");

   y++;

   nod=getNumberOfDays(mon,year);

   odd=getOddNumber(d,mon,year);

   switch(odd)

   {
     case 0 : x=x;

	      cnt=1;

	      break;

     case 1 : x=x+4;

	      cnt=2;

	      break;

     case 2 : x=x+8;

	      cnt=3;

	      break;

     case 3 : x=x+12;

	      cnt=4;

	      break;

     case 4 : x=x+16;

	      cnt=5;

	      break;

     case 5 : x=x+20;

	      cnt=6;

	      break;

     case 6 : x=x+24;

	      cnt=7;

	      break;

     default : printf("

INVALID DATA FROM THE getOddNumber() 
MODULE");

	       return;

   }
   gotoxy(25,25);

   gotoxy(x,y);

   printf("d",d);

   for(d=2;d<=nod;d++)

   {
      if(cnt%7==0)

      {
	y++;

	cnt=0;

	x=x1-4;

      }
      x = x+4;

      cnt++;

      gotoxy(x,y);

      printf("d",d);

   }
}
main()
{
   char ch='k';
   int dd,mm,yy;
   while(ch!='0')
   {
      clrscr();
      printf("




				1.Know the day");

				2.Print the month");

      printf("
				0.EXIT");

      printf("

				ENTER YOUR CHOICE : ");

      flushall();

      fflush(stdin);

      ch=getche();

      clrscr();

      switch(ch)

      {
	case '1': printf("Enter date (DD MM YYYY) : ");

		  scanf("%d %d %d",&dd,&mm,&yy);

		  printf("
Day is : %s",getWeek(dd,mm,yy));

		  flushall();

		  getch();

		  break;

	case '2' : printf("Enter month and year (MM YYYY) : ");
		   scanf("%d %d",&mm,&yy);

		   printf("

");
		   printMonth(mm,yy,-1,-1);

		   flushall();

		   getch();

		   break;

	case '0' : exit(0);

      }
   }
}