Some Date
Manipulation program and a program for generating Calendar.
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
//Print the day of the week from
given date
int
valid(long dd,long mm,long yy,int mn[])
{
if(mm>12
|| mm<1)
{
return
1;
}
if(yy<1)
{
return
1;
}
if(dd>mn[mm-1])
{
return
1;
}
return
0;
}
void
main()
{
char
days[8][12]={"Monday","Tusesday","Wednesday","Thrusday","Friday","Saturday","Sunday"};
long
m[12]={31,28,31,30,31,30,31,31,30,31,30,31};
long
dd,mm,yy,i,d,td=0;
clrscr();
printf("\n\tEnter
Day : ");
scanf("%ld",&dd);
printf("\n\tEnter
Month : ");
scanf("%ld",&mm);
printf("\n\tEnter Year : ");
scanf("%ld",&yy);
i=valid(dd,mm,yy,m);
if(i==1)
{
printf("\n\n\t%ld-%ld-%ld
is an invalid Date ",dd,mm,yy);
getch();
exit(0);
}
printf("\n\tWeek
day for Date %2ld/%2ld/%4ld is ",dd,mm,yy);
if(yy>1900)
{
td=((yy-1)-1900)*365+((yy-1)-1900)/4;
}
if(yy==1900)
{
td=td+dd-1;
}
else
{
td=td+dd;
}
for(i=1;i<mm;i++)
{
if(yy%4==0)
{
m[1]=29;
}
else
{
m[1]=28;
}
td=td+m[i-1];
}
d=td%7;
printf("
%s ",days[d]);
getch();
}
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
//Program for Generating
Calendar
void main()
{
char
b[12][12]={"January","February","March","April","May","June","July","August","September","October","November","December"};
char
a[8][4]={"Mon","Tue","Wed","Thu","Fri","Sat","Sun"};
long
m[12]={31,28,31,30,31,30,31,31,30,31,30,31};
long
y,i,d,j,td=0,k,n;
clrscr();
printf("\n\tEnter Year : ");
scanf("%ld",&y);
td=((y-1)-1900)*365+((y-1)-1900)/4;
d=(td+1)%7;
printf("\n\n\t\tCalender
of Year : %d ",y);
n=d;
for(i=0;i<12;i++)
{
if(y%4==0)
{
m[1]=29;
}
else
{
m[1]=28;
}
printf("\n\n\t\tMonth
: %s \n\n",b[i]);
for(j=0;j<7;j++)
{
printf(" %s\t",a[j]);
}
k=0;
printf("\n",n);
for(j=1;j<=n;j++)
{
printf("\t");
}
while(k<m[i])
{
k++;
n++;
printf(" %2d \t",k);
if(n==7)
{
n=0;
printf("\n");
}
}
getch();
}
getch();
}
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