p383 例11.9 虚基类简单应用.cpp

谭浩强 《C++ 程序设计》第三版的部分课后练习题源码

#include<iostream>
#include<string>
using namespace std;
class Person
{
      protected:
              string name;
              int age;
              char sex;
              
      public:
             Person(string n,int a,char s):name(n),age(a),sex(s){}
             void display();
};

void Person::display()
{
     cout<<"the name:  "<<name<<endl;
     cout<<"the age:  "<<age<<endl;
     cout<<"the sex:  "<<sex<<endl;
     
}

class Teacher:virtual public Person
{
      protected:
                string title;
      public:
             Teacher(string n,int a,char s,string t):Person(n,a,s),title(t) {}
             void display();
};

void Teacher::display()
{
     Person::display();
     cout<<"the position: "<<title<<endl;
}    
    
class Student:virtual public Person
{
      protected:
                float score;
                
      public:
             Student(string n,int a,char s,float sc):Person(n,a,s),score(sc){}
             void display();
      
};       
      
void Student::display()
{
     Person::display();
     cout<<"the score:  "<<score<<endl;
     
}      

class Graduate:public Teacher,public Student
{
      private:
              float wage;
              
      public:
             Graduate(string n,int a,char s,string t,float sc,float w)
            :Person(n,a,s),Student(n,a,s,sc),Teacher(n,a,s,t),wage(w){}
            void display();
};            

void Graduate::display()
{
     Teacher::display();
     cout<<"the score:  "<<score<<endl;
     cout<<"the wage:  "<<wage<<endl;
     
     }
      
      
 int main()
 {
     Graduate gra("wang li",34,'f',"assistant",89.5,1234);
     Student st("wang li",34,'f',78.9);
     Teacher te("wang li",34,'f',"professor");
     cout<<endl<<"the graduate information: "<<endl;
     gra.display();
     cout<<endl<<"the student information: "<<endl;
     st.display();
     cout<<endl<<"the teacher information: "<<endl;
     te.display();
     system("pause");
     return 0;
 }