2018-11-07if条件2 作业2

请用户输年份,再输入月份,输出该月的天数
int day = 0;

switch (mon)

{

  case 1:

  case 3:

  case 5:

  case 7:

  case 8:

  case 10:

  case 12: day = 31;

  break;

  case 2:

        if (year % 4 == 0)

        {

            day = 29;

        }

        else

        {

            day = 28;

        }

        break;

        default:

            day=30;

        break;

}

Console.WriteLine("{0}年的{1}月有{2}天", year, mon, day);

Console.ReadKey();