#include <stdio.h> #include <stdlib.h>
int get_1st_weekday(int year) { int day; day = (((year - 1) * 365) + ((year - 1) / 4) - ((year - 1) / 100) + ((year) / 400) + 1) % 7; return day; } int main() { system("Color 05F"); int year,i,j,k,m=0,n; printf("\nEnter the year YYYY:"); scanf("%d",&year); char *month[]={"JANUARY","FEBRUARY","MARCH","APRIL","MAY","JUNE","JULY","AUGUST","SEPTEMBER","OCTOBER","NOVEMBER","DECEMBER"}; int day[]={31,28,31,30,31,30,31,31,30,31,30,31};
if((year%4==0 && year%100!=0) || year%400==0) day[1]=29;
n=get_1st_weekday(year);
for(i=0;i<12;i++) { k=day[i]; printf("\n\n~~~~~~~~~~~~~~~~%s~~~~~~~~~~~~~~~~~\n",month[i]); printf("\n Sun Mon Tue Wed Thurs Fri Sat\n");
for(n=0;n<m;n++)
printf(" ");
for(j=1;j<=k;j++) { printf("%5d",j);
if(++m>6)
{
printf("\n");
m=0;
}
} n=m; } if(year % 400 == 0) {
printf("\n\n%d is a Leap Year",year); } else if (year % 100 == 0) { printf("\n\n%d is not a Leap Year.",year); } else if(year % 4 == 0) { printf("\n\n%d is a Leap Year.",year); } else { printf("\n\n%d is not a Leap Year.",year); } if(year % 400 == 0) {
printf("\n\nThere are 366 days in the year %d",year); } else if (year % 100 == 0) { printf("\n\nThere are 365 days in the year %d",year); } else if(year % 4 == 0) { printf("\n\nThere are 366 days in the year %d",year); } else { printf("\n\nThere are 365 days in the year %d",year); }
//Zeller Algorithm// //Zeller’s congruence is an algorithm devised by Christian Zeller// //It is used to calculate the day of the week for any Gregorian calendar date// int h,q,s,t,u,D,M,Y; printf("\n\nTo find the particular day on the date please enter(dd/mm/yyyy)\n"); scanf("%i/%i/%i",&D,&M,&Y); if(M == 1) { M = 13; Y--; } if (M == 2) { M = 14; Y--; } q = D; s = M; t = Y % 100; u = Y / 100; h = q + floor(13/5*(s+1)) + t + floor(t/4) + floor(u/4) + 5 * u; h = h % 7; switch(h) { case 0 : printf("\nThe day is : Saturday \n"); break; case 1 : printf("\nThe day is : Sunday \n"); break; case 2 : printf("\nThe day is : Monday \n"); break; case 3 : printf("\nThe day is : Tuesday \n"); break; case 4 : printf("\nThe day is : Wednesday \n"); break; case 5 : printf("\nThe day is : Thursday \n"); break; case 6 : printf("\nThe day is : Friday \n"); break; } return 0; }
return 0;
}