Aniket The Programmer
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Source Code
#include <stdio.h>
int main() {
int year, month, daysInMonth, startingDay, dayOfWeek;
// Input year and month
printf("Enter year: ");
scanf("%d", &year);
printf("Enter month (1-12): ");
scanf("%d", &month);
// Calculate the number of days in the month
if (month == 2) {
// Check for leap year
if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
daysInMonth = 29;
else
daysInMonth = 28;
} else if (month == 4 || month == 6 || month == 9 || month == 11) {
daysInMonth = 30;
} else {
daysInMonth = 31;
}
// Calculate the starting day of the month
startingDay = (year - 1) * 365 + (year - 1) / 4 - (year - 1) / 100 + (year - 1) / 400;
for (int i = 1; i < month; ++i) {
if (i == 2) {
if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
startingDay += 29;
else
startingDay += 28;
} else if (i == 4 || i == 6 || i == 9 || i == 11) {
startingDay += 30;
} else {
startingDay += 31;
}
}
dayOfWeek = (startingDay + 1) % 7; // Incrementing the starting day by 1
// Display the calendar
printf("\n==============================\n");
printf(" %d-%02d\n", year, month);
printf("==============================\n");
printf(" Sun Mon Tue Wed Thu Fri Sat\n");
// Print spaces for the days before the starting day of the month
for (int i = 0; i < dayOfWeek; ++i) {
printf(" ");
}
// Print the days of the month
for (int day = 1; day <= daysInMonth; ++day) {
printf("%4d", day);
if ((day + dayOfWeek) % 7 == 0) {
printf("\n");
}
}
printf("\n");
return 0;
}