基類構造中，不要期望多態行爲

#ifndef _PLOYMORPHISM__H
#define _PLOYMORPHISM__H

class CBase
{
public:
    CBase()
    {
        init();
    };
    ~CBase()
    {};

    virtual void init()
    {
        printf("CBase::init()\n");
    };
    void test()
    {
        init();
    };

private:
};


class CDerived : public CBase
{
public:
    CDerived()
    {
        init();
    };
    ~CDerived()
    {};

    void init()
    {
        printf("CDerived::init()\n");
    };
private:
};

void ploymorphism_test_main()
{
    CBase *base = new CDerived;

    base->init();
    base->test();

    delete base;
    return;
};


#endif //_PLOYMORPHISM__H

結果：
CBase::init()
CDerived::init()
CDerived::init()
CDerived::init()
注意基類構造中的init()，先了子類構造發生，不會有多態行爲。