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Calender

Calender

#include"stdio.h"
#include"conio.h"
#include<dos.h>
#include<stdlib.h>
#include<iostream.h>
int month(int,int,int);
int yea(int);
void cal(int,int);
void print(int,int);
void main()
	{

	   int g,year,h;
	   char ch,mu='y';
	   clrscr();
	   mos:
	   clrscr();
	   cout<<"		INSTRUCTION FOR FINDING MONTH OF ANY YEAR";
	   cout<<"

		ENTER MONTH IN LETTER AND YEAR ONWARDS 0000";
	   cout<<"

		CALENDER";
	   printf("
			PLEASE ENTER MONTH:=");
	   scanf("%d",&g);
	   printf("
			NOW ENTER YEAR:=");
	   scanf("%d",&year);
	   printf("
			FIND");
	   for(h=0;h<=3;h++)
	   {
	       printf("	 .");
	       delay(100);
	   }
	   cal(g,year);
	   while(mu=='y')
	   {
	   ch=getch();
	   if(ch=='n')
	   {
	      if(g==12)
	      {
		 year+=1;
		 g=1;
		 cal(g,year);
	      }
	      g+=1;
	      cal(g,year);
	  }
	  else if(ch=='p')
	  {

	    if(g==1)
	    {
	      year-=1;
	      g=13;
	      cal(g,year);
	    }
	    g-=1;
	    cal(g,year);
	  }
	  else if(ch=='m')
	  {
	      year+=1;
	      cal(g,year);
	 }
	 else if(ch=='b')
	 {
	      year-=1;
	      cal(g,year);
	 }
	 else if(ch=='c')
	 goto mos;
	 else if(ch=='q')
	 {
	    exit(0);
	 }
	 }
	 fflush(stdin);
	 getch();
	 }
void cal(int g,int year)
{

	   int n,o,i;
	   clrscr();
	   cout<<"

	TO FIND NEXT YEAR PRESS M";
	   cout<<"

	TO FIND PREVIOUS YEAR PRESS B";
	   cout<<"

	TO FIND NEXT MONTH PRESS N";
	   cout<<"

	TO FIND PREVIOUS MONTH PRESS P";
	   cout<<"

	TO EXIT PRESS Q";
	   printf("

		MONTH %d",g);
	   printf("

		YEAR %d",year);
	   n=yea(year);
	   o=month(g,year,n);
	   if((g==1)||(g==3)||(g==5)||(g==7)||(g==8)||(g==10)||(g==12))
	   {
	      print(31,o);
	   }
	   else if((g==4)||(g==6)||(g==9)||(g==11))
	   {
	     print(30,o);
	   }
	   else if(g==2)
	   {
	      if(year%4==0)
		print(29,o);
	      else
		print(28,o);
	   }
	   }
int yea(int year)
{
    int i,k,n;
    unsigned long int m,j;
    for(i=0;i<year;i++)
    {
       if(i%4==0)
       {
	  m=m+366;
       }
       else
	  m=m+365;
    }
    j=m+7;
    k=j%7;
    n=k%7;
    switch(n)
    {
       case 0:
       n=1;
       break;
       case 1:
       n=2;
       break;
       case 2:
       n=3;
       break;
       case 3:
       n=4;
       break;
       case 4:
       n=5;
       break;
       case 5:
       n=6;
       break;
       case 6:
       n=0;
       break;
    }
    return(n);
 }
int month(int g,int year,int n)
{
       int j,o;
       for(j=1;j<g;j++)
       {
	  if((j==1)||(j==3)||(j==5)||(j==7)||(j==8)||(j==10))
	  n=n+31;
	  else if((j==4)||(j==6)||(j==9)||(j==11))
	  n=n+30;
	  else if(j==2)
	  {
	     if(year%4==0)
	     {
		n=n+29;
		continue;
	     }
	     else
	     n=n+28;
	     continue;
	  }
       }
       o=n%7;
       return(o);
 }
void print(int p,int q)
{
    int i,j,l=0;
    printf("


");
    printf("MON	TUE	WED	THU	FRI	SAT	SUN
");
    while(l!=q)
    {
       printf("	");
       l++;
    }
    for(i=1;i<=p;i++)
    {
       printf("%d	",i);
       q++;
       if(q==7)
       {
	 printf("
");
	 q=0;
       }
    }
}