c++编程：输入年号和月份，输出这一年的该月的天数。 (一个年份，先判断是否闰年)

#include
using namespace std;
int isLeap(int year)
{
if( year%400 == 0 || (year %4 == 0 && year %100 !=0))
{
return 1;
}
else
{
return 0;
}
}
int main()
{
int year;
int month;
int a[12]={31,28,31,30,31,30,31,31,30,31,30,31};
cout<<"please input the year"< cin>>year;
cout<<"please input the month"< cin>>month;
if(isLeap(year))
{
a[1] = a[1] +1;
}
cout<<"days = "< cin.get();
cin.get();
return 0;
}

#include
void main()
{ int temp=0,month,year;
printf("Please input (year,month):");
scanf("%d,%d",&year,&month);
if((year%400==0)||(year%4==0&&year%100!=0))
temp=1;
{if(month==2)
{if(temp==
1)
printf("%dyear%dmonth have 29 days\n",year,month);
else printf("%dyear%dmonth have 28 days\n",year,month);
}
else
{ if(month<=7)
{if(month%2==1)
printf("%dyear%dmonth have 31 days\n",year,month);
else
printf("%dyear%dmonth have 30 days\n",year,month);}
else
{if(month%2==1)
printf("%dyear%dmonth have 30 days\n",year,month);
else
printf("%dyear%dmonth have 31 days\n",year,month);}
}
}
}

#include
using namespace std;
int month[13] ={0,31,28,31,30,31,30,31,31,30,31,30,31};
int run(int year)
{
return (year%4==0 && year%100!=0) || year%400==0;
}
int main()
{
int y, m;
while(scanf("%d%d", &y, &m)==2)
{
month[2] = 28 + run(y);
printf("%d\n", month[m]);
}
}