继承

#include 
     
      using namespace std;class father{public:    void getHeight(){cout<
      
       <
       
        weight<
        
         height<
         
          age<
         
        
       
      
     

 

子类对象赋值给父类

#include 
     
      using namespace std;class father{public:    int height;};class son: public father{public:    int weight;};int main(){    son a;    father b;    a.height=1;    b=a;//子类赋给父类}
     

父类引用指向子类对象

#include 
     
      using namespace std;class father{public:    int height;};class son: public father{public:    int weight;};int main(){    father *p;    son jack;    p=&jack; //父类引用指向子类对象 父类还可以作为子类的别名（虚函数）    p->height=110;    cout<
      
       <
      
     

 

#include 
     
      using namespace std;class father{protected:    int height;};//私有派生用的不多，因为继承的成员都变成私有的了，不可以访问class son: private father{ //继承的父类的protected,public全部变成 privatepublic:    int weight;    int getHeight()    {        return height;        }    void setHeight(int x)    {        this->height=x;        }};int main(){    son a ;    a.setHeight(1);    cout<
      
       <
      
     

 

继承中构造函数的执行顺序（先构造基类，后构造子类， 先析构子类，在析构基类）

#include 
     
      using namespace std;class father{private:    int height;public:    father(){cout<<"father construct"<
     

 

多重继承，以 继承的顺序进行构造

 

向基类构造函数传递参数

#include 
     
      using namespace std;class father{public:    int height;    int weight;public:    father(int height, int weight ){        this->height=height;        this->weight=weight;        cout<<"father construct"<
      
       age=age;    cout<<"son construct"<
      
     

 

多继承的歧义(作用域操作符)

#include 
     
      using namespace std;//class father{////public://    int height;//    int weight;//public://    father(int height, int weight ){//        this->height=height;//        this->weight=weight;//        cout<<"father construct"<
      
       age=age;//    cout<<"son construct"<
      
     

 

解决两异性（虚基类）

#include 
     
      using namespace std;class common{public:    void stand(){}};class a: virtual public common{public:    void hello(){cout<<"a hello"<