Explain all the elements of the below c program.
Explain all the elements of the below c program.
#include <stdio.h>
#include <stdlib.h>
int get_1st_weekday(int year){
int d;
d = (((year - 1) * 365) + ((year - 1) / 4) - ((year - 1) / 100) + ((year) / 400) + 1) % 7;
return d;
}
int main()
{
system("Color 3F");
int year,month,day,daysInMonth,weekDay=0,startingDay;
printf("\nEnter your desired year:");
scanf("%d",&year);
char *months[]={"January","February","March","April","May","June","July","August","September","October","November","December"};
int monthDay[]={31,28,31,30,31,30,31,31,30,31,30,31};
if((year%4==0&&year%100!=0)||year%400==0)
monthDay[1]=29;
startingDay=get_1st_weekday(year);
for(month=0;month<12;month++){
daysInMonth=monthDay[month];
printf("\n\n---------------%s-------------------\n",months[month]);
printf("\n Sun Mon Tue Wed Thurs Fri Sat\n");
for(weekDay=0;weekDay<startingDay;weekDay++)
printf(" ");
for(day=1;day<=daysInMonth;day++){
printf("%5d",day);
if(++weekDay>6){
printf("\n");
weekDay=0;
}
startingDay=weekDay;
}
}
}
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