计算某年某月某日是这一年的第几天

#include<stdio.h>
bool Is_Leap(int year)
{
     return(year % 4 == 0 && year % 100 != 0 || (year % 400 == 0);//判断是不是闰年
}
int YearMonth_To_Day(int year, int month)
{
    int day[] = {29,31,28,31,30,31,30,31,31,30,31,30,31};
    if (month == 2 && Is_Leap(year))//注意二月有两个数据
    {
       month = 0;
    }
    return day[month];
}
int Get_YMD_To_Total(int year, int month, int day)
{
    int total = 0;
    int i = 1;
    if (year < 1) return -1;
    if (month < 1 || month > 12) return -2;
    if (day < 1 || day > YearMonth_To_Day(year, month)) return -3;
    for (int i = 1; i < month; ++i)
    {
        total += yearMonth_To_Day(year, i);
    }
    return total + day;
}
int main()
{
    int year = 0, month = 0, day = 0, total = 0;
    scanf_s("%d%d%d",&year, &month, &day);
    total = Get_YMD_To_Total(year, month, day);
    if (total > 0)
    {
       printf("%d year %d month %d day => total \n", year, month, day, total);
    }
    else
    {
        printf("input error \n");
    }
    return 0;
}