advancedmath.cpp

来自「这是ATL电子书的随书代码」· C++ 代码 · 共 60 行

// AdvancedMath.cpp : Implementation of CAdvancedMath
#include "stdafx.h"
#include "Chapter5_Contain.h"
#include "AdvancedMath.h"

/////////////////////////////////////////////////////////////////////////////
// CAdvancedMath


// IAdvancedMath interface
long calcFactorial( short n )
{
   if ( n > 1 )
      return n * calcFactorial( n - 1 );
   else
      return 1;
}

STDMETHODIMP CAdvancedMath::Factorial( short sOp, long* plResult )
{
   *plResult = calcFactorial( sOp );
   return S_OK;
}

long calcFibonacci( short n )
{
   if ( n <= 1 )
      return 1;

   return calcFibonacci( n - 1 ) + calcFibonacci( n - 2 );
}

STDMETHODIMP CAdvancedMath::Fibonacci( short sOp, long* plResult )
{
   *plResult = calcFibonacci( sOp );
   return S_OK;
}

// Implementation needed with containment
// However, we just pass the call on to the contained component
STDMETHODIMP CAdvancedMath::Add(long lOp1, long lOp2, long * plResult)
{
   return m_pSimpleMath->Add( lOp1, lOp2, plResult );
}

STDMETHODIMP CAdvancedMath::Subtract(long lOp1, long lOp2, long * plResult)
{
   return m_pSimpleMath->Subtract( lOp1, lOp2, plResult );
}

STDMETHODIMP CAdvancedMath::Multiply(long lOp1, long lOp2, long * plResult)
{
   return m_pSimpleMath->Multiply( lOp1, lOp2, plResult );
}

STDMETHODIMP CAdvancedMath::Divide(long lOp1, long lOp2, long * plResult)
{
   return m_pSimpleMath->Divide( lOp1, lOp2, plResult );
}