//语法：
public static bool IsLeapYear(int year)
//用法举例：
using System;public class IsLeapYear
{public static void Main(){for (int year = 1994; year <= 2014; year++){if (DateTime.IsLeapYear(year)){Console.WriteLine("{0} is a leap year.", year);DateTime leapDay = new DateTime(year, 2, 29);DateTime nextYear = leapDay.AddYears(1);Console.WriteLine("   One year from {0} is {1}.", leapDay.ToString("d"),nextYear.ToString("d"));}         }}
}

C++:

#include<iostream>
using namespace std;
int main()
{int n=0;for(int i=1000;i<2050;i++)if((i%4==0 && i%100!=0)||i%400==0){cout<<i<<endl;n++;}cout<<n<<endl;return 0;
}