virtual functions with person class : virtual function « Class « C++

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C++ » Class » virtual functionScreenshots 
virtual functions with person class
  
#include <iostream>  
  using namespace std;  

  class person{  
     protected:  
        char name[40];  
     public:  
        void getName()  
           cout << "   Enter name: "; cin >> name; }  
        void putName()  
           cout << "Name is: " << name << endl; }  
        virtual void getData() 0;
        virtual bool isOutstanding() 0;
    };  
  class student : public person{  
     private:  
        float gpa;             
     public:  
        void getData(){  
           person::getName();  
           cout << "   Enter student's GPA: "; cin >> gpa;  
        }  
        bool isOutstanding()  
        
           return (gpa > 3.5true false
        }  
  };  
  class professor : public person{  
     private:  
        int numPubs;             
     public:  
        void getData(){  
           person::getName();  
           cout << "   Enter number of professor's publications: ";  
           cin >> numPubs;  
        }  
        bool isOutstanding()  
        
           return (numPubs > 100true false
        }  
  };  
  int main(){  
     person* persPtr[100];
     int n = 0;           
     char choice;  
    
     do {  
        cout << "Enter student or professor (s/p): ";  
        cin >> choice;  
        if(choice=='s')   
           persPtr[nnew student;     
        else                             
           persPtr[nnew professor;   
        persPtr[n++]->getData();         
        cout << "   Enter another (y/n)? ";
        cin >> choice;  
     whilechoice=='y' );          
    
     for(int j=0; j<n; j++){                                
        persPtr[j]->putName();           
        ifpersPtr[j]->isOutstanding() )  
           cout << "   This person is outstanding\n";  
     }  
     return 0;  
  }
  
    
  
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2.Virtual function and two subclasses
3.Abstract classes by virtual function with no body
4.Override non-virtual function
5.Implementing Pure Virtual Functions
6.Illustration of the Use of Virtual Inheritance
7.Using Virtual Methods
8.Multiple Virtual Functions Called in Turn
9.Virtual Copy Constructor
10.virtual functions accessed from pointer
11.Call parent virtual function
12.Using Virtual Functions to control the behaviour
13.Pure Virtual Functions as a prototype
14.Virtual Functions Are Hierarchical
15.Virtual function in three level inheritance
16.The Virtual Attribute Is Inherited
17.Virtual Functions and Polymorphism
18.A base class reference is used to access a virtual function
19.Virtual base classes.
20.virtual members
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