题解 | #计算日期到天数转换#

#include <array>
#include <climits>
#include <iostream>
using namespace std;
class Date
{
public:
    Date(int year = 2024,int month = 1,int day = 1)
    {
        _year = year;
        _month =month;
        _day =day;
    }
    static int GetMonthDay(int year,int month)
    {
        static std::array<int, 13>monthday = {0,31,28,31,30,31,30,31,31,30,31,30,31};
        if(month == 2 && ((year %4 ==0 && year %100 !=0) || year %400 ==0))
        {
            return 29;
        }
        return monthday[month];
    }

    int _year;
    int _month;
    int _day;
};
int main() {
    Date d;
    while (cin >>d._year>>d._month>>d._day) 
    { 
        int sum = d._day;
        int curmonthday = 0;
        int month =d._month;
        for(int i = 1 ; i < d._month;i++)
        {
            curmonthday = d.GetMonthDay(d._year, i);
            sum = sum + curmonthday;
        }
        cout<<sum<<endl;
    }
    return 0;
}