// StopwatchClient.cpp : 
//   Defines the entry point for the console application.
//

// std::out etc
#include <iostream>
#include <windows.h>

#include "Timers_i.c"
#include "Stopwatch.h"

void UseStopwatch(IStopwatch* const pStopwatch)
{
  float nElapsedTime;

  pStopwatch->Start();
  pStopwatch->ElapsedTime( &nElapsedTime );

  std::cout << "The overhead time is "  
    << nElapsedTime << std::endl;
}

int main(int argc, char* argv[])
{
  HRESULT hr;
  IStopwatch* pStopwatch  = NULL;

  char ch;

  CoInitialize( NULL );

  hr = CoCreateInstance(
    CLSID_Stopwatch, 
    NULL, 
    CLSCTX_ALL, 
    IID_IStopwatch, 
    (void**) &pStopwatch);

  if ( !SUCCEEDED(hr) )
  {
    std::cout << "ERROR: Unable to create Stopwatch!!\n";
    switch(hr)
    {
    case REGDB_E_CLASSNOTREG:
      std::cout << "     Class not registered.\n";
      break;
    case E_NOINTERFACE :
      std::cout << "     No such interface implemented.\n";
      break;
    case CLASS_E_NOAGGREGATION  :
      std::cout << "     No aggregation.\n";
      break;
    default:
      std::cout << "     Unexpected error.\n";
      break;
    }
  }
        
  else
  {
    UseStopwatch(pStopwatch);

    pStopwatch->Release();
    
    pStopwatch = NULL;
  }

  CoUninitialize();

  std::cout << "Type a character to continue:  ";
  std::cin >> ch;
  return 0;
}