Function Override

Example 1:

// Function Override

#include <iostream>
using namespace std;

class arithmetic
{
  protected:
    int a, b, sum, sub, mul, div;
  public:
    void values (int x, int y)
      {
a=x, b=y;
      }
    virtual int operations ()
      {
sum= a + b;
cout<< "Addition of two numbers is "<< sum<<"\n";
      }
};

class Subtract: public arithmetic
{
  public:
    int operations ()
      {
sub= a - b;
cout<< "Difference of two numbers is "<<sub <<"\n";
      }
};

class Multiply: public arithmetic
{
  public:
    int operations ()
      {
mul = a * b;
cout<< "Product of two numbers is "<< mul<<"\n";
      }
};

class Divide: public arithmetic
{
  public:
    int operations ()
      {
div = a / b;
cout<< "Division of two numbers is "<< div<<"\n";
      }
};


int main()
{
    arithmetic *arith, p;
    Subtract subt;
    Multiply mult;
    Divide divd;

    arith=&p;
    arith->values(30,12);
    arith->operations();

    arith=&subt;
    arith->values(42,5);
    arith->operations();

    arith=&mult;
    arith->values(6,5);
    arith->operations();

    arith=&divd;
    arith->values(6,3);
    arith->operations();

return 0;
}