图片发自简书App
Console.WriteLine("请输入一个年份");
int year = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("请输入一个月份");
int month = Convert.ToInt32(Console.ReadLine());
if (month >= 1 && month <= 12)
{
int day = 0;
switch (month)
{ case 1: case 3: case 5: case 7: case 8: case 10: case 12: day = 31;
break;
case 2:
if ((year % 400 == 0) || (year % 4 == 0 && year % 100 != 0)) { day = 29; }
else { day = 28; } break; default: day = 30; break; }//swich Console.WriteLine("{0}年{1}月有{2}天", year, month, day); }//
if else { Console.WriteLine("月份必须在1~12月之间，程序退出！！！"); } Console.ReadKey();
