C++月份天数判断

代码如下

#includeusing namespace std;int main(){    int year, month;    cout <> year >> month;    if (month == 2)    { if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) {     cout << "29天" << endl; } else {     cout << "28天" << endl; }   }    else    { switch (month) { case 1: case 3: case 5: case 7: case 8: case 10: case 12:     cout << "31天" << endl;break; case 4: case 6: case 9: case 11:     cout << "30天" << endl;break; default:     cout << "请输入正确的月份！"; }    }}