About Technology

So far we have learnt to overload +, -, +=, -= etc. operators and we know what
is the basic theory behind operator overloading.

In this article we are going to design a program with a class that overloads
almost all the arithmetic operators (+, -, +=, -=, /, *, ++, --)

This is a program centric article, so we straightway have a look at the example
program.

Since nothing new has been introduced, I leave it up to you to understand everything
yourself.


  // Example Program with a
  // a class having almost
  // all the arithmetic
  // operators overloaded
  #include <iostream.h>

  class myclass
  {
    int a;
    int b;

  public:
    myclass(){}
    myclass(int,int);
    void show();

    myclass operator+(myclass);
    myclass operator-(myclass);

    // prefix
    myclass operator++();
    myclass operator--();

    // postfix
    myclass operator++(int);
    myclass operator--(int);

    myclass operator+=(myclass);
    myclass operator-=(myclass);

    myclass operator/(myclass);
    myclass operator*(myclass);

  };

  myclass::myclass(int x,int y)
  {
    a=x;
    b=y;
  };

  void myclass::show()
  {
    cout<<a<<endl<<b<<endl;
  }

  myclass myclass::operator+(myclass ob)
  {
    myclass temp;

    temp.a=a + ob.a;
    temp.b=b + ob.b;

    return temp;
  }

  myclass myclass::operator-(myclass ob)
  {
    myclass temp;

    temp.a=a - ob.a;
    temp.b=b - ob.b;

    return temp;
  }

  myclass myclass::operator++()
  {
    a++;
    b++;

    return *this;
  }

  myclass myclass::operator--()
  {
    a--;
    b--;

    return *this;
  }

  myclass myclass::operator++(int x)
  {
    myclass old;
    old=*this;

    a++;
    b++;

    return old;
  }

  myclass myclass::operator--(int x)
  {
    myclass old;
    old=*this;

    a--;
    b--;

    return old;
  }

  myclass myclass::operator+=(myclass ob)
  {
    a+=ob.a;
    b+=ob.b;

    return *this;
  }

  myclass myclass::operator-=(myclass ob)
  {
    a-=ob.a;
    b-=ob.b;

    return *this;
  }

  myclass myclass::operator/(myclass ob)
  {
    myclass temp;

    temp.a=a / ob.a;
    temp.b=b / ob.b;

    return temp;
  }

  myclass myclass::operator*(myclass ob)
  {
    myclass temp;

    temp.a=a * ob.a;
    temp.b=b * ob.b;

    return temp;
  }

  void main()
  {
    myclass ob1(10,20);
    myclass ob2(100,200);

    ob1+=ob2;

    ob1.show();
    ob2.show();

    ob1=ob1/ob2;
    ob1.show();

    ob1=ob1*ob2;
    ob1.show();

    ob2.show();
  }