Tests publicly- and privately-derived classes - C++ Class

C++ examples for Class:Member Access

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Description

Tests publicly- and privately-derived classes

Demo Code

#include <iostream>
using namespace std;
class A                  //base class
{
private:/* w  w w  . j a v a  2  s .  c o m*/
  int privdataA;     //(functions have the same access
protected:            //rules as the data shown here)
  int protdataA;
public:
  int pubdataA;
};
class B : public A       //publicly-derived class
{
public:
  void funct()
  {
    int a;
  //  a = privdataA;  //error: not accessible
    a = protdataA;  //OK
    a = pubdataA;   //OK
  }
};
class C : private A      //privately-derived class
{
public:
  void funct()
  {
    int a;
    //a = privdataA;  //error: not accessible
    a = protdataA;  //OK
    a = pubdataA;   //OK
  }
};
int main()
{
  int a;
  B objB;
//  a = objB.privdataA;   //error: not accessible
//  a = objB.protdataA;   //error: not accessible
  a = objB.pubdataA;    //OK (A public to B)
  C objC;
  //a = objC.privdataA;   //error: not accessible
  //a = objC.protdataA;   //error: not accessible
//  a = objC.pubdataA;    //error: not accessible (A private to C)
  return 0;
}

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