math.cpp

来自「这是ATL电子书的随书代码」· C++ 代码 · 共 60 行

// Math.cpp : Implementation of CMath
#include "stdafx.h"
#include "Chapter7_CallBackServer.h"
#include "Math.h"

/////////////////////////////////////////////////////////////////////////////
// CMath

STDMETHODIMP CMath::Add(long lOp1, long lOp2)
{
   long lResult = lOp1 + lOp2;

   if ( m_pCallBack )
      m_pCallBack->ComputationComplete( lResult );

	return S_OK;
}

STDMETHODIMP CMath::Subtract(long lOp1, long lOp2)
{
   long lResult = lOp1 - lOp2;

   if ( m_pCallBack )
      m_pCallBack->ComputationComplete( lResult );

   return S_OK;
}

STDMETHODIMP CMath::Multiply(long lOp1, long lOp2)
{
   long lResult = lOp1 * lOp2;

   if ( m_pCallBack )
      m_pCallBack->ComputationComplete( lResult );

	return S_OK;
}

STDMETHODIMP CMath::Divide(long lOp1, long lOp2)
{
   long lResult = lOp1 / lOp2;

   if ( m_pCallBack )
      m_pCallBack->ComputationComplete( lResult );

	return S_OK;
}

STDMETHODIMP CMath::Advise(ICallBack * pCallBack)
{
   m_pCallBack = pCallBack;
   return S_OK;
}

STDMETHODIMP CMath::UnAdvise()
{
   m_pCallBack = 0;
   return S_OK;
}