Erreur de lien 2005 - "already defined in"
Bonjour,
Lorsque je compile le code ci-dessous j'obtiens les messages d'erreur suivant:
Citation:
1>Generating Code...
1>Compiling...
1>SimpleMC.cpp
1>Generating Code...
1>Linking...
1>SimpleMCMain2.obj : error LNK2005: "protected: virtual void __thiscall debugFlowTracer::AddFlow(void)" (?AddFlow@debugFlowTracer@@MAEXXZ) already defined in SimpleMC.obj
1>SimpleMCMain2.obj : error LNK2005: "protected: virtual void __thiscall debugFlowTracer::RemoveFlow(void)" (?RemoveFlow@debugFlowTracer@@MAEXXZ) already defined in SimpleMC.obj
1>SimpleMCMain2.obj : error LNK2005: "private: static class debugFlowTracerManager * debugFlowTracerManager::m_Instance" (?m_Instance@debugFlowTracerManager@@0PAV1@A) already defined in SimpleMC.obj
1>C:\MoonDragon\DistanceLearning\cpp\code\Chap2\Debug\Chap2.exe : fatal error LNK1169: one or more multiply defined symbols found
1>Build log was saved at "file://c:\MoonDragon\DistanceLearning\cpp\code\Chap2\Chap2\Debug\BuildLog.htm"
1>Chap2 - 4 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
SimpleMC.cpp :
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| #include <SimpleMC.h>
#include <Random1.h>
#include <cmath>
#include "FlowTracerManager.h"
// the basic math functions should be in namespace std but aren't in VCPP6
#if !defined(_MSC_VER)
using namespace std;
#endif
double SimpleMonteCarlo2(const PayOff& thePayOff,
double Expiry,
double Spot,
double Vol,
double r,
unsigned long NumberOfPaths)
{
debugFlowTracer flow("SimpleMonteCarlo2");
double variance = Vol*Vol*Expiry;
double rootVariance = sqrt(variance);
double itoCorrection = -0.5*variance;
double movedSpot = Spot*exp(r*Expiry +itoCorrection);
double thisSpot;
double runningSum=0;
for (unsigned long i=0; i < NumberOfPaths; i++)
{
double thisGaussian = GetOneGaussianByBoxMuller();
thisSpot = movedSpot*exp( rootVariance*thisGaussian);
double thisPayOff = thePayOff(thisSpot);
runningSum += thisPayOff;
}
double mean = runningSum / NumberOfPaths;
mean *= exp(-r*Expiry);
return mean;
} |
SimpleMCMain.cpp :
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| #include<SimpleMC.h>
#include<iostream>
#include "FlowTracerManager.h"
using namespace std;
int main()
{
debugFlowTracer flow("main");
double Expiry;
double Strike;
double Spot;
double Vol;
double r;
unsigned long NumberOfPaths;
cout << "\nEnter expiry\n";
cin >> Expiry;
cout << "\nEnter strike\n";
cin >> Strike;
cout << "\nEnter spot\n";
cin >> Spot;
cout << "\nEnter vol\n";
cin >> Vol;
cout << "\nr\n";
cin >> r;
cout << "\nNumber of paths\n";
cin >> NumberOfPaths;
PayOff callPayOff(Strike, PayOff::call);
PayOff putPayOff(Strike, PayOff::put);
double resultCall = SimpleMonteCarlo2(callPayOff,
Expiry,
Spot,
Vol,
r,
NumberOfPaths);
double resultPut = SimpleMonteCarlo2(putPayOff,
Expiry,
Spot,
Vol,
r,
NumberOfPaths);
cout <<"the prices are " << resultCall << " for the call and "
<< resultPut << " for the put\n";
double tmp;
cin >> tmp;
return 0;
} |
FlowTracerManager.h :
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|
#ifndef FLOWTRACERMANAGER_H
#define FLOWTRACERMANAGER_H
#include "FlowTracer.h"
class debugFlowTracerManager
{
private:
std::stack< debugFlowTracer> m_functionStack;
static debugFlowTracerManager *m_Instance;
public:
static debugFlowTracerManager *Instance()
{
if ( m_Instance == NULL )
m_Instance = new debugFlowTracerManager();
return m_Instance;
}
void addFlow( debugFlowTracer& cFlow )
{
m_functionStack.push( cFlow );
}
void removeFlow(debugFlowTracer& cFlow)
{
if ( m_functionStack.empty() )
return;
// Get the top element
debugFlowTracer t = m_functionStack.top();
// Remove it.
m_functionStack.pop();
// If there is anything left, add it
if ( m_functionStack.empty() )
{
printf("Flow [%s]:\n", t.Name().c_str() );
t.PrintStack(0);
}
else
m_functionStack.top().AddSubFlow( t );
}
private:
debugFlowTracerManager()
{
}
debugFlowTracerManager(const debugFlowTracerManager& aCopy )
{
}
virtual ~debugFlowTracerManager(void)
{
}
};
debugFlowTracerManager *debugFlowTracerManager::m_Instance = NULL;
void debugFlowTracer::AddFlow()
{
debugFlowTracerManager::Instance()->addFlow( *this );
}
void debugFlowTracer::RemoveFlow()
{
debugFlowTracerManager::Instance()->removeFlow( *this );
}
#endif |
FlowTracer.h :
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|
#ifndef _FLOWTRACER_H_
#define _FLOWTRACER_H_
#include <string>
#include <stack>
#include <vector>
class debugFlowTracer
{
private:
std::string m_sFlowName;
std::vector< debugFlowTracer > m_activefunctionStack;
bool m_bRemoved;
protected:
virtual void AddFlow();
virtual void RemoveFlow();
public:
debugFlowTracer(void)
{
m_sFlowName = "Unknown";
m_bRemoved = false;
AddFlow();
}
debugFlowTracer(const char *strFlow)
{
m_sFlowName = strFlow;
m_bRemoved = false;
AddFlow();
}
debugFlowTracer( const debugFlowTracer& aCopy )
{
m_sFlowName = aCopy.m_sFlowName;
std::vector< debugFlowTracer >::const_iterator iter;
for ( iter = aCopy.m_activefunctionStack.begin(); iter != aCopy.m_activefunctionStack.end(); ++iter )
m_activefunctionStack.insert( m_activefunctionStack.end(), (*iter) );
}
~debugFlowTracer(void)
{
if ( !m_bRemoved )
RemoveFlow();
m_bRemoved = true;
}
std::string Name()
{
return m_sFlowName;
}
void AddSubFlow( debugFlowTracer& cSubFlow )
{
// Just push it on top of the active function stack
m_activefunctionStack.insert( m_activefunctionStack.end(), cSubFlow );
}
void PrintStack(int iLevel)
{
std::vector< debugFlowTracer >::iterator iter;
for ( iter = m_activefunctionStack.begin(); iter != m_activefunctionStack.end(); ++iter )
{
for ( int i=0; i<iLevel; ++i )
putchar ('\t');
printf("%s\n", (*iter).Name().c_str() );
(*iter).PrintStack(iLevel+1);
}
}
};
#endif |
