Help with a console program

[calle563]

Hi, I started to learn C++ a few days ago and I'm stuck on an assignment.

It's a console program that is supposed to work like a reaction game. It says something like "Get ready!" and somewhere between 3-10 seconds it will say "Now!" and you press enter, after that it should show you how many milliseconds it took you to react.

The tips I got was to look up "C++ sleep" and "C++ tickcount". Would appreciate any help I can get, thanks!

[skaa]

Something like this (tested in Borland C++ Builder 5.0):

  DWORD	qmscdelay,qmscb,qmsce;
  int	nchr;

  printf("Get ready!\n");
  qmscdelay=3000+random(7001);
  Sleep(qmscdelay);
  printf("Now!\n");
  qmscb=GetTickCount();
  for(;;)
  {
    if(kbhit())
    {
      nchr=getch();
      if(!nchr)
        getch();
      else
      {
        if(nchr==13)
      	  break;
      }
    }
  }
  qmsce=GetTickCount();
  printf("%i milliseconds\n",qmsce-qmscb);

[MiiNiPaa]

Portable standard C++11 implementation:

#include <chrono>
#include <iostream>
#include <random>
#include <thread>

int main()
{
    namespace aion = std::chrono;
    using clock_type = std::conditional<aion::high_resolution_clock::is_steady,
                                        aion::high_resolution_clock,
                                        aion::steady_clock>::type;
    using frac_second = aion::duration<double>;

    std::random_device rd;
    std::mt19937_64 gen(rd());
    std::uniform_int_distribution<> random_time(3000, 10000);

    auto wait_time = aion::milliseconds(random_time(gen));
    std::cout << "Wait...\n";
    std::this_thread::sleep_for(wait_time);
    std::cout << "Now!\n";
    auto start = clock_type::now();
    std::cin.get();
    auto end = clock_type::now();

    std::cout << "It took you " << aion::duration_cast<frac_second>(end-start).count() <<
                 " seconds to react.";
}

[calle563]

Thanks for all the help!

[SumitSharma]

Thanks for sharing this.