Inherit base as private

  

#include <iostream>
using namespace std;

class BaseClass {
  int x;
public:
  void setx(int n) { 
     x = n; 
  }
  void showx() { 
     cout << x << '\n'; 
  }
};

// Inherit BaseClass as private.
class DerivedClass : private BaseClass {
  int y;
public:
  
  void setxy(int n, int m) { 
     setx(n);             // setx is accessible from within DerivedClass
     y = m; 
  }
  
  void showxy() { 
     showx();             // showx is accessible from within DerivedClass
     cout << y << '\n'; 
  }
};
 
int main()
{
  DerivedClass ob;

  ob.setxy(10, 20); 

  ob.showxy();

  return 0;
}

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5.	A simple example of inheritance.
6.	Share member variables between sub class
7.	Virtual functions retain virtual nature when inherited.
8.	call contructor from parent class
9.	Cascade constructor and destructor call
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Inherit base as private : Inheritance « Class « C++

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