毎年毎月何日か

#include <iostream>
using namespace std;
int main ()
{
	int year,month,days;
	cout<<"     :"<<endl;
	cin>>year;
	cout<<"     :"<<endl;
	cin>>month;
	if(month==2)
	{
		if((year%4==0  &&  year%100!=0)||(year%400==0))	
			days=29;
		else 
			days=28;
	}
	else
	{
		if(month==1 || month==3 || month==5 || month==7 || month==8 || month==10 || month==12)
			days=31;
		else
		{
			if(month==4 || month==6 || month==9 || month==11)
				days=30;
		}
	}
	cout<<"   "<<days<<" "<<endl;
	return 0;
}

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<img src="http://img.blog.csdn.net/20160406210651686?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />