A simple example of inheritance.

  

#include <iostream>
using namespace std;

class BaseClass {
  int i;
public:
  void setInt(int n);
  int getInt();
};

class DerivedClass : public BaseClass {
  int j;
public:
  void setJ(int n);
  int mul();
};

void BaseClass::setInt(int n)
{
  i = n;
}

int BaseClass::getInt()
{
  return i;
}

void DerivedClass::setJ(int n)
{
  j = n;
}

int DerivedClass::mul()
{
  return j * getInt();
}

int main()
{
  DerivedClass ob;

  ob.setInt(10);        // load i in BaseClass
  ob.setJ(4);          // load j in DerivedClass

  cout << ob.mul();     // displays 40

  return 0;
}

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1.	Public inheritance
2.	Three level public inheriance
3.	Make field public during private inheritance
4.	Demonstrate inheriting a protected base class.
5.	Share member variables between sub class
6.	Virtual functions retain virtual nature when inherited.
7.	Inherit base as private
8.	call contructor from parent class
9.	Cascade constructor and destructor call
10.	Call parent constructor and pass in parameter
11.	Access control under inheritance

A simple example of inheritance. : Inheritance « Class « C++

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