学步园

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
	int a,b,c;//a=年份，b=月份
	cout<<"请输入年，月，例2004年2月请输入2004 2.请输入：";
	cin>>a>>b;
	if(a%4==0&&a%100!=0)
	{if(b==2)
	c=28;}
	else
		if(b==2)
			c=29;
	
		switch(b)
		{
		case 1:c=31;break;
		case 2:break;
		case 3:c=31;break;
		case 4:c=30;break;
		case 5:c=31;break;
		case 6:c=30;break;
		case 7:c=31;break;
		case 8:c=31;break;
		case 9:c=30;break;
		case 10:c=31;break;
		case 11:c=30;break;
		case 12:c=31;break;
		}
		cout<<"天数为："<<c<<endl;

	cout<<"天数为："<<c<<endl;

	return 0;