03.if 和 switch结合练习

{

class Program

{

static void Main(string[] args)

    {

//请用户输入年份,再输入月份,输出该月有多少天

Console.WriteLine("请输入年份:");

int year =Convert.ToInt32(Console.ReadLine());

Console.WriteLine("请输入月份:");

int month = Convert.ToInt32(Console.ReadLine());

    switch (month)

    {

        case 1:

        case 3:

        case 5:

        case 7:

        case 8:

        case 10:

        case 12:

Console.WriteLine("该月有31天!");

break;

        case 4:

        case 6:

        case 9:

        case 11:

Console.WriteLine("该月有30天!");

break;

        case 2:

        if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)

        {

Console.WriteLine("该月有29天.");

}

        else

        {

Console.WriteLine("该月有28天.");

}

break;

}

Console.ReadKey();

}

}

}