把自1970年1月1日以来的秒数转化成年月日

#include <iostream>

using namespace std;

 

bool IsRound(int year){

 if((year%100)&&(year%4==0)) return 1;

 if((year%100==0)&&(year%400==0)) return 1;

 return 0;

}

int main() {

 int n;

 int year_s[2]= {365*24*60*60, 366*24*60*60};

 int month_s[2][12]={{31,28,31,30,31,30,31,31,30,31,30,31},

   {31,29,31,30,31,30,31,31,30,31,30,31}};

 int day_s = 24*60*60;

 int hour_s = 60*60;

 int minute_s = 60;

 

  

 

 while(cin>>n){

    int temp = n;

    int year=1970;

         int month=1;

         int day=1;

         int hour=0;

         int minute=0;

         int second=0;

 

    while(temp>=60){

 

     int flag= IsRound(year);

     if(temp>=year_s[flag]) { year++; temp-=year_s[flag]; }

     else if(temp>=day_s){

      int days = temp/day_s;

      temp=temp%day_s;

      int i=0;

      int flag = IsRound(year);

      int hh=31;

      while(days>=hh){

       days-=month_s[flag][i++];

       hh=month_s[flag][i];

       }

      month+= i;

      day+=days;

 

     }else if(temp>=hour_s){

          hour=temp/hour_s;

          temp%=hour_s;

     }else if(temp>=minute_s){

           minute = temp/minute_s;

           temp%=minute_s;

     }

     }

     second = temp;

 

        cout<<year<<"-";

      if(month/10==0) cout<<"0";

      cout<<month<<"-";

      if(day/10==0) cout<<"0";

      cout<<day<<" ";

      if(hour/10==0) cout<<"0";

      cout<<hour<<":";

      if(minute/10==0) cout<<"0";

      cout<<minute<<":";

      if(second/10==0) cout<<"0";

      cout<<second<<endl;

 }

 

 

 return 0;

}