///////////////////////////////////////////////////////////////
//  client.cpp - client of IArray interface                  //
//  ver 1.0                                                  //
//                                                           //
//  demonstrate creation of simple ATL-based, in-process     //
//  component. This client uses CComQIPtr and IArray         //
//  classes.                                                 //
//                                                           //
//  Language:     Visual C++, ver 6.0, SP 5.0                //
//  Platform:     Dell Dimension 8100, Win2000, SP2          //
//  Application:  Demo: CSE791 - Distributed Objects         //
//  Author:       Jim Fawcett, CST 2-187, Syracuse Univ.     //
//                (315) 443-3948, jfawcett@twcny.rr.com      //
///////////////////////////////////////////////////////////////

#include <string>
#include <iostream>
#include <objbase.h>
#include <atlbase.h>
#include "A4.h"
using namespace std;

int main()
{

  cout << "\n  Midterm A, Question #4 -  out array of shorts "
       << "\n ===============================================\n"
       << endl;

  // Initialize COM Library
  CoInitialize(NULL) ;

  wstring prefix = L"  Client: \t\t";

  try {

    CComQIPtr<IPtrToDouble> pIPtrToDouble;
    pIPtrToDouble.CoCreateInstance(CLSID_PtrToDouble);

    DOUBLE dbl = 3.1415927;
    DOUBLE *pDouble = &dbl;
    cout << "\n  before call to myFunction address of double variable = "
         << pDouble;

    if(pIPtrToDouble) {
      
      HRESULT hr;
      hr = pIPtrToDouble->myFunction(pDouble);
      if(!SUCCEEDED(hr))
        throw "call to myFunction(...) failed";

      cout << "\n  value returned from myFunction = " << dbl;
      cout << endl;
      cout << "\n  after call to myFunction address of double variable = "
           << pDouble;
    }
  }
  catch(const char *msg) {

    cout << "\n  " << msg << "\n\n";
  }

  // Uninitialize COM Library
  //   Note: If you declare CComQIPtr in the same scope as CoInitialize
  //   and CoUninitialize(), then you must call pIString.Release() before
  //   calling CoUninitialize().  If declared in a nested scope, as here, 
  //   the destructor, ~CComQIPtr() will call release for you, when it 
  //   leaves the inner scope.

  CoUninitialize() ;

  cout << "\n\n";
  return 0 ;
}