基类: class human{  public:         int getHumanType{ return m_iType; }          vitual printHumanType() {};   private:       int m_iType; };   子类: class yellowHuman: public human{ public:   vitual printHumanType()   {         cout << "it's yellow human\n";   } };   class whiteHuman: public human{ public:   vitual printHumanType()   {         cout << "it's white Human\n";   } };   class blackHuman: public human{ public:   vitual printHumanType()   {         cout << "it's blackHuman\n";   } };   // 应用 int main() {     human*  humanTest[3];    humanTest[0]= new yellowHuman;    humanTest[1]= new whiteHuman;    humanTest[2]= new blackHuman;      for(int i=0;i<3;i++)    {        humanTest[i]->printHumanType();    }     return 0; }   结果： it's yellow human it's white Human it's blackHuman   至于为什么会这么输出，请详细研究C++   virtual相关内容

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