Using pointers on derived class objects. : Derived « Class « C++

1. C++
2. Class
3. Derived

Using pointers on derived class objects.

  
#include <iostream>  
#include <string.h>  
using namespace std;
class B_class {  
  char name[80];  
public:  
  void put_name(char *s) {strcpy(name, s); }  
  void show_name(void) {cout << name << " ";}  
} ;  
     
class D_class : public B_class {  
  char phone_num[80];  
public:  
  void put_phone(char *num) {  
    strcpy(phone_num, num);  
  }  
  void show_phone() {cout << phone_num << "\n";}  
};  
     
main(void)  
{  
  B_class *p;  
  B_class B_ob;  
     
  D_class *dp;  
  D_class D_ob;  
     
  p = &B_ob;
     
  p->put_name("Thomas Edison");  
     
  p = &D_ob;  
  p->put_name("Albert Einstein");  
     
  B_ob.show_name();  
  D_ob.show_name();  
  cout << "\n";  
     
  dp = &D_ob;  
  dp->put_phone("555 555-1234");  
  p->show_name();
  dp->show_phone();  
  return 0;  
}
  
    
  

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