#include <iostream> using namespace std; bool isLeapYear(int year) { // 如果年份可以被4整除但不能被100整除，或者可以被400整除，则是闰年 return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0); } int main() { int year; cout << "Enter a year : "; cin >> year; if (isLeapYear(year)) { cout << year << "leap year." << endl; } else { cout << year << "not leap year." << endl; } return 0; }