C++ 多态和虚函数

【摘要】 虚函数实现多态
#include <iostream>using namespace std; //基类Peopleclass People{public: virtual void display(); //声明为虚函数};void People::display(){ cout<<“无业游民。”<<endl;} //派生类Teacherclass Teacher: p…

虚函数实现多态

      #include <iostream>

      using namespace std;

      //基类People

      class People{

      public:

      virtual void display();  //声明为虚函数

      };

      void People::display(){

      cout<<"无业游民。"<<endl;

      }

      //派生类Teacher

      class Teacher: public People{

      public:

      virtual void display();  //声明为虚函数

      };

      void Teacher::display(){

      cout<<"是一名教师"<<endl;

      }

      int main(){

       People *p = new People();

       p -> display();

       p = new Teacher();

       p -> display();

      return 0;

      }

  


                    
        
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