math.cpp

来自「这是ATL电子书的随书代码」· C++ 代码 · 共 65 行

//
// Math.cpp : Implementation of CMath
//

#include "stdafx.h"
#include "Chapter3_Server.h"
#include "Math.h"

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


STDMETHODIMP CMath::Add(long lOp1, long lOp2, long * plResult)
{
   *plResult = lOp1 + lOp2;
   return S_OK;
}

STDMETHODIMP CMath::Subtract(long lOp1, long lOp2, long * plResult)
{
   *plResult = lOp1 - lOp2;
   return S_OK;
}

STDMETHODIMP CMath::Multiply(long lOp1, long lOp2, long * plResult)
{
   *plResult = lOp1 * lOp2;
   return S_OK;
}

STDMETHODIMP CMath::Divide(long lOp1, long lOp2, long * plResult)
{
   *plResult = lOp1 / lOp2;
   return S_OK;
}

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

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

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

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

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