本月天数

//
//  main.cpp
//  project
//
//  Created by 徐伟 on 6/8/16.
//  Copyright © 2016 fizz_i. All rights reserved.
//


#include<iostream>
using namespace std;
int main()
{
    int  year, month, days;
    cout << "请输入年、月: ";
    cin >> year >> month;
    switch(month)
    {
        case 1:
        case 3:
        case 5:
        case 7:
        case 8:
        case 10:
        case 12:
            days = 31;
            break;
        case 4:
        case 6:
        case 9:
        case 11:
            days = 30;
            break;
        case 2:
            if(year%4==0 && year%100!=0 ||year%400==0)
                days = 29;
            else
                days =28;
    }
    cout<<year<<"年"<<month<<"月共有"<<days<<"天。"<<endl;
    return 0;  
}