题目描述

日期问题

C++ 代码

#include <cstdio>
#include <iostream>
#include<cstring>
#include<algorithm>
using namespace std;
int days[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int a,b,c;

bool check_valid(int year, int month, int day)
{
    if (month == 0 || month > 12) return false;
    if (day == 0) return false;
    if (month != 2)
    {
        if (day > days[month]) return false;
    }
    else
    {
        int leap = ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0));
        if (day > days[month] + leap) return false;
    }

    return true;
}

int main(){
    scanf("%d/%d/%d",&a,&b,&c);
    for (int i = 19600101; i <= 20591231; i++ ){
        int year = i / 10000, month = i /100 %100, day = i % 100;
        if (check_valid(year, month, day))
        {
            if ((year % 100 == a && month == b && day == c) ||  // 年/月/日
                (month == a && day == b && year % 100 == c) ||  // 月/日/年
                (day == a && month == b && year % 100 == c) )   //月/日/年
                printf("%d-%02d-%02d\n", year, month, day);  //补前导0
        }
    }
    return 0;
}