C++ Primer 3.4

3.4.cpp

#include <iostream>
const int hours_in_a_day = 24;
const int minutes_in_an_hour = 60;
const int seconds_in_a_minute = 60;

int main()
{
  using namespace std;
  long second;
  long remain;

  cout << "Enter the number of seconds: ";
  cin >> second;
  cout << second << " seconds = ";
  cout << second / (hours_in_a_day * minutes_in_an_hour * seconds_in_a_minute) << " days, ";
  remain = second - (hours_in_a_day * minutes_in_an_hour * seconds_in_a_minute) * (second / (hours_in_a_day * minutes_in_an_hour * seconds_in_a_minute));
  cout << remain / (minutes_in_an_hour * seconds_in_a_minute) << " hours, ";
  remain = remain - (minutes_in_an_hour * seconds_in_a_minute) * (remain / (minutes_in_an_hour * seconds_in_a_minute));
  cout << remain / seconds_in_a_minute << " minutes, ";
  remain = remain -  seconds_in_a_minute * (remain / seconds_in_a_minute);
  cout << remain << " seconds" << endl;

  return 0;
}