将父数据成员值传递给子类

程序的目的是生成扬声器外壳的模拟脚本。

这样我就有了一个类speaker，它定义了speaker。

父类enclosure，包含所有enclosure的公共参数。

具有自身特殊属性的子类。

使用多态性和继承，我获得了第一个程序，它工作得很好，但我需要每次重新计算外壳的基本属性:

class speaker
{     
}
class Enclosure
{ 
        int m_boxHeight;
        speaker * m_speakerBass;//...
        public://some functions
}
class closedBox : public Enclosure
{        
    public: 
        closedbox(speaker &speakerbass):Enclosure(speakerbass)//    some functions            
    protected:
        int paramclosed1;//...            
 }
int main()
{    
    speaker speakerbass;
    cout <<endl<< "Please choose in the available enclosure proposals" << endl;
    cout << "1 Closed box enclosure" << endl;
   // cout << "2 Bass reflex enclosure" << endl;
   // cout << "3 and so on..." << endl;
    int choice;
    cin>>choice;
          switch (choice)
      {
         case 1:
            closedbox * ClBox2Simu;
            ClBox2Simu= new closedbox(speakerbass);       
            delete ClBox2Simu;
            break;
         case 2:
             //... same but with bassreflex class child    
            break;
         default:
            cout<<"Then good bye";
      }
    return 0;
}

在我的程序中，父类的成员数据可以给子类。我的意思是，Enclosure的盒维数在每个子类bassreflex或closedbox中都是相同的。

因此，如果有一种方法，我现在会:

• 创建父类

• 进行第一次初始一般计算

• 用父参数创建子参数

表示child=parent，这是不允许的。在这个代码的思想中:

class speaker
{
    public:        //    some functions
    protected:
        int fs;
        int paramSpeaker2;            //...    
}
class Enclosure
{    
    public:            //some common function
    protected:
        int m_boxHeight;
        speaker *m_speakerBass //...    
}
class closedBox : public Enclosure
{    
    public:
        closedbox();  //    some functions
    protected:
        int paramclosed1;  //...    
}
class bassreflex : public Enclosure
{    
    public:
        bassreflex();  //    some functions
    protected:
        int paramclosed1;   //...    
}
int main()
{    
    Enclosure initialBox;// calculate dimension,choose speaker...
            closedbox * ClBox2Simu;
            ClBox2Simu= initialBox;//  child= parent which is forbidden
            //do stuff concerning closedbox
            delete ClBox2Simu;
            bassreflex * BassReflex2Simu;
            BassReflex2Simu= initialBox; //forbidden
            //do stuff concerning bassreflex
            delete BassReflex2Simu;
             //... and so on for other child class using enclosure
      delete initialBox
    return 0;
}

希望这是清楚的!