using System;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
int y, m, d, daynum = 30, y1=0, m1,i;
Console.Write("请输入年：");
y = Convert.ToInt32(Console.ReadLine());
Console.Write("请输入月：") ;
m=Convert.ToInt32(Console.ReadLine());
Console.Write("请输入日：");
d = Convert.ToInt32(Console.ReadLine());
if (y < 1000 || y > 9999 || m < 1 || m > 12)
{
Console.Write("日期不合法！");
return;
}
for (i = 1; i < m; i++)
{
switch (i)
{
case 2: daynum = 28;
if ((y % 400 == 0) || (y % 4 == 0 && y % 100 != 0)) daynum = 29; break;
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
daynum = 31; break;
case 4:
case 6:
case 9:
case 11:
daynum = 30; break;
}
if (d < 1 || d > daynum)
{
Console.Write("日期不合法！");
return;
}
y1 = y1 + daynum;
}
m1 = y1 + d;
Console.WriteLine("今天是{0}年的第{1}天", y, m1);
Console.ReadLine();
}
}
}
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