#编码
/**
*
* 用户输年份,再输入月份,输出该月的天数
*
* */
Console.WriteLine("输年份");
string str_year = Console.ReadLine();
int year = Convert.ToInt32(str_year);
Console.WriteLine("输月份");
string str_months = Console.ReadLine();
int months = Convert.ToInt32(str_months);
if (months >= 1 && months <= 12)
{
switch(months)
{
case 1:
Console.WriteLine("{0}年，{1}月，有31天",year,months);
break;
case 3:
Console.WriteLine("{0}年，{1}月，有31天", year, months);
break;
case 4:
Console.WriteLine("{0}年，{1}月，有30天", year, months);
break;
case 5:
Console.WriteLine("{0}年，{1}月，有31天", year, months);
break;
case 6:
Console.WriteLine("{0}年，{1}月，有30天", year, months);
break;
case 7:
Console.WriteLine("{0}年，{1}月，有31天", year, months);
break;
case 8:
Console.WriteLine("{0}年，{1}月，有31天", year, months);
break;
case 9:
Console.WriteLine("{0}年，{1}月，有30天", year, months);
break;
case 10:
Console.WriteLine("{0}年，{1}月，有31天", year, months);
break;
case 11:
Console.WriteLine("{0}年，{1}月，有30天", year, months);
break;
case 2:
if (year % 400 == 0 || (year % 10 == 0 && year % 4 == 0))
{
Console.WriteLine("{0}年，{1}月，有29天", year, months);
}
else
{
Console.WriteLine("{0}年，{1}月，有28天", year, months);
}
break;
default:
Console.WriteLine("{0}年，{1}月，有31天", year, months);
break;
}
}
else
{
Console.WriteLine("月份在1~12之间");
}
Console.ReadKey();
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;//存储天数
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！！！")
#效果
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;//存储天数
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.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;//存储天数
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！！！")