ตรวจปีอธิกสุรทิน

#include <stdio.h>
int main(void) {
    int year = 2024;
    // Apply the Gregorian calendar rules in one expression.
    int leap = year % 400 == 0 || (year % 4 == 0 && year % 100 != 0);
    printf("%d is %sa leap year\n", year, leap ? "" : "not ");
}

#include <iostream>
int main() {
    int year = 2024;
    // Apply the Gregorian calendar rules in one expression.
    bool leap = year % 400 == 0 || (year % 4 == 0 && year % 100 != 0);
    std::cout << year << " is " << (leap ? "" : "not ") << "a leap year\n";
}