求解！！解决实际就是时间

int get_days(int year,int month){
    int day=0;
    if(year<0||month<1||month>12) return day;
    if(month==1||month==3||month==5||month==7||month==8||month==10||month==12){
        day=31;
    }else if(month==4||month==6||month==9||month==11){
        day=30;
    }else if(month==2){
        if(year%4==0&&year%100!=0 || year%400==0){
            day=29;
        }else{
            day=28;
        }
    }
    return day;
}

 觉得有用的话采纳一下哈