int main()
{
int year,month;
bool leap;
int days;
label:
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:
break;
default:
cerr<<"error!";
goto label;
break;
}
if((year%4==0&&year%100==0)||year%400==0)
{
if(month==2)
days=29;
leap=true;
}
else
{
if(month==2)
days=28;
leap=false;
}
cout<<days<<leap;
return 0;
}
还有一些细节要改,你自己来吧