Demonstrate pointer to derived class. : Derived « Class « C++

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C++ » Class » DerivedScreenshots 
Demonstrate pointer to derived class.
Demonstrate pointer to derived class.
  

#include <iostream>
using namespace std;

class BaseClass {
  int x;
public:
  void setx(int i) { 
     x = i; 
  }
  int getx() { 
     return x; 
  }
};

class DerivedClass : public BaseClass {
  int y;
public:
  void sety(int i) { 
     y = i; 
  }
  int gety() { 
     return y; 
  }
};

int main()
{
  BaseClass *p;                               // pointer to BaseClass type
  BaseClass baseObject;                       // object of BaseClass
  DerivedClass derivedObject;                 // object of DerivedClass


  p = &baseObject;                            // use p to access BaseClass object
  p->setx(10);                                // access BaseClass object
  cout << "Base object x: " << p->getx() << '\n';


  p = &derivedObject;                         // point to DerivedClass object 
  p->setx(99);                                // access DerivedClass object

  
  derivedObject.sety(88);                     // can't use p to set y, so do it directly
  cout << "Derived object x: " << p->getx() << '\n';
  cout << "Derived object y: " << derivedObject.gety() << '\n';

  return 0;
}


           
         
    
  
Related examples in the same category
1.A base pointer to access derived objectsA base pointer to access derived objects
2.Simple class with its derived classSimple class with its derived class
3.call constructor from parent for three level extending
4.Using pointers on derived class objects.
5.how to pass arguments to the base classes of a derived class by modifying the preceding program
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