题解 | #打印日期#

#define  _CRT_SECURE_NO_WARNINGS
#include <iostream>
using namespace std;


int arr1[13] = { 0,31,29,31,30,31,30,31,31,30,31,30,31 };
int arr2[13] = { 0,31,28,31,30,31,30,31,31,30,31,30,31 };
bool Leap_year(int year)
{
    if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
    {
        return true;
    }
    return false;
}
int main()
{
    int year, day;
    while (scanf("%d %d", &year, &day) != EOF)
    {
        //如果是闰年
        int month = 1;
        if (Leap_year(year))
        {
            for (int i = 1; i <= 12; i++)
            {
                if (day > arr1[i])
                {
                    day -= arr1[i];
                    month++;
                }
                else
                {
                    break;
                }
            }
            printf("%4d-%02d-%02d\n", year, month, day);
        }
        else
        {
            for (int i = 1; i <= 12; i++)
            {
                if (day > arr2[i])
                {
                    day -= arr2[i];
                    month++;
                }
                else
                {
                    break;
                }
            }
            printf("%4d-%02d-%02d\n", year, month, day);
        }
    }
    return 0;
}