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C program for calender


#include
#include
void main()
{
int yy,dd,mm,nleap,count,scount,i=1;
long int dp;
do
{
printf("\nEnter the year: ");
scanf("%d",&yy);
}while(yy<1);
do
{
printf("\nEnter the month: ");
scanf("%d",&mm);
}while(mm<1||mm>12);
if(mm==4||mm==6||mm==9||mm==11)
{
dd=30;
}
if(yy%4==0&&yy%100!=0||yy%400==0)
{
if(mm==2)
{
dd=29;
}
}
else
{
if(mm==2)
{
dd=28;
}
}
if(mm==1||mm==3||mm==5||mm==7||mm==8||mm==10||mm==12)
dd=31;
nleap=(yy-1)/4-(yy-1)/100+(yy-1)/400;
dp=(yy-1)*365l+nleap;
switch(mm)
{
case 12:dp+=30;
case 11:dp+=31;
case 10:dp+=30;
case 9:dp+=31;
case 8:dp+=31;
case 7:dp+=30;
case 6:dp+=31;
case 5:dp+=30;
case 4:dp+=31;
case 3:dp+=28;
case 2:dp+=31;
case 1:dp+=1;
}
printf("\nmon tue wed thu fri sat sun");
switch(dp%7)
{
case 1: count=0;
break;
case 2: count=4;
break;
case 3: count=8;
break;
case 4: count=12;
break;
case 5: count=16;
break;
case 6: count=20;
break;
default : count=24; //case 0: printf(" Sunday");
}
printf("\n");
scount=count;
while(scount>0)
{
printf(" ");
--scount;
}
while(dd>=i)
{
if(count%28==0)
printf("\n");
printf("%3d ",i);
i++;
count+=4;
}
getch();
}










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