// demonstrates usage of time function
// Mikhail Nesterenko
// 9/16/2009

#include <iostream>
#include <ctime>

using std::cout; using std::cin; using std::endl;

int main(){
  // prints out current time
  int currentTime = time(nullptr);
  cout << currentTime << " seconds has passed since 00:00 hours of January 1, 1970\n";

  // measures time it take user to intput an integer
  int input;
  do{
    const int from = time(nullptr);
    cout << "Enter positive integer (0 to quit): ";
    cin >> input;
    const int to = time(nullptr);
    cout << "It took you "
         << (to - from) << " seconds to enter "
         << input << endl;

  }while (input > 0);

}