日期问题2

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
int months[13]={0,31,28,31,30,31,30,31,31,30,31,30,31}; //初始化每个月的天数
bool check(int year,int month,int date)  //检验日期的合法性
{
    if (month<=0||month>12) return false;
    if (date==0) return false;
    if (month!=2)
    {
        if (date>months[month]) return false;
    }
    else  //特判闰年
    {
        int leap=(year%4==0&&year%100!=0||year%400==0);
        if (date>28+leap) return false;
    }
    return true;
}
int main()
{
    int a,b,c;
    scanf("%d/%d/%d",&a,&b,&c);  //用scanf标准输入输出
    for (int i=19600101;i<=20591231;i++)  //枚举年份，和输入的信息比对
    {
        int year=i/10000; 
        int month=i%10000/100;
        int day=i%100;
        if (check(year,month,day))
        {
            if ((year%100==a&&month==b&&day==c)
            ||(month==a&&day==b&&year%100==c)
            ||(day==a&&month==b&&year%100==c))
            printf("%d-%02d-%02d\n",year,month,day);  //%02d：若补足两位则左补0，符合输出格式
        }
    }
    return 0;
}