题解 | 计算日期到天数转换

#include <iostream>
using namespace std;
#include <assert.h>

int GetMonthDay(int year, int month)
{
	assert(month > 0 && month < 13);

	static int monthDayArray[13] = { -1, 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;
	}
	else
	{
		return monthDayArray[month];
	}
}

int main()
{
    int year = 0,month = 0,day = 0;
    cin>>year>>month>>day;
    int Numbers_of_day = 0;
   for(int i = 1;i<month;i++)
   {
        Numbers_of_day += GetMonthDay(year,i );
   }
   Numbers_of_day += day;
   cout <<Numbers_of_day;
    return 0;
}