1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5  6 namespace ConsoleApplication1 7 { 8     class 闰平年 9     {10         static void Main(string[] agre)11         {12             Console.Write("请输入一个年份：");13             string a = Console.ReadLine();14             int year = Convert.ToInt32(a);15 16             if (year % 400 == 0)17             {18                 Console.WriteLine(year + "年是闰年");19             }20             else if (year % 4 == 0 && year % 100 != 0)21             {22                 Console.WriteLine(year + "年是闰年");23                24             }25             else26             {27                 Console.WriteLine(year + "年是平年");28             }29         }30     }31 }