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Figure 2: Class Derived interface and implementation

/* ==========================================
Derived.h
========================================== */

#ifndef DERIVED_H
#define DERIVED_H

#ifndef THREADABLEOBJECT_H
#include "threadableobject.h"
#endif

class Derived : public ThreadableObject
{
public:
    Derived();
    ~Derived();
    
    void SetChar( char ch );

    // Pure Virtual function in MultiThread
    virtual bool 
    ThreadableTask(DWORD* dwReturnCode);

private:
    char m_ch;
    int m_nCount;
};
#endif

/* ==========================================
Derived.cpp
========================================== */

#include "derived.h"
#include <iostream>


Derived::Derived()
:ThreadableObject()
{
    m_ch = '\0';
    m_nCount = 0;
}


Derived::~Derived()
{}


void Derived::SetChar(char ch)
{
    m_ch = ch;
}


bool 
Derived::ThreadableTask( DWORD* dwReturnCode )
{
    using namespace std;

    while ( m_nCount < 100 )
    {
        cout << m_ch;
        m_nCount++;
        // return true;
    }

    *dwReturnCode = 0;
    return false;
}

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