C++ Code Review: Overloading Binary Operator

Description: This program shows how to overload binary operators [such as +,-,* and /]. The program uses switch case constructor to present menu.

Code:

//Compiling Tool: Code::Block IDE with MinGW

//Program shows how to overload binary opertor

 

#include<iostream>

#include<conio.h> //for getch()

#include<process.h>

//#include<math.h>  //for sqrt()

#include<cstdlib> //for system()

 

using namespace std;

 

class demo

{

    float

    a,b;

 

public:

    void getdata();

    void display();

    demo

    operator +(demo);

    demo

    operator -(demo);

    demo

    operator *(demo);

    demo

    operator /(demo);

    int

    operator ==(demo);

};

 

void demo::getdata()

{

    cout<<"Enter values of a and b:";

    cin>>a>>b;

}

 

void demo::display()

{

    cout<<"a="<<a<<"\t b="<<b;

}

 

demo demo::operator +(demo d1)

{

    demo

    d2;

    d2.a=a+d1.a;

    d2.b=b+d1.b;

    return d2;

}

 

demo demo::operator -(demo d1)

{

    demo

    d2;

    d2.a=a-d1.a;

    d2.b=b-d1.b;

    return d2;

}

 

demo demo::operator *(demo d1)

{

    demo

    d2;

    d2.a=a*d1.a;

    d2.b=b*d1.b;

    return d2;

}

 

demo demo::operator /(demo d1)

{

    demo

    d2;

    d2.a=a/d1.a;

    d2.b=b/d1.b;

    return d2;

}

 

int demo::operator ==(demo d1)

{

    if((a==d1.a)&&(b==d1.b))

        return

            1;

    else

        return

            0;

}

 

int main()

{

    int ch;

    demo d1,d2,d3;

 

top:

    system("Cls");

 

    cout << endl;

    cout<<"***Operator Overloading Program***"<< endl;

    cout<<"   1. Addition"<< endl;

    cout<<"   2. Subtraction"<< endl;

    cout<<"   3. Multiplication"<< endl;

    cout<<"   4. Division"<< endl;

    cout<<"   5. Comparison"<< endl;

    cout<<"   6. Quit"<< endl;

    cout<<"Enter your Choice:_";

    cin>>ch;

 

    if(ch<6)

    {

        cout<<"First Object:\n";

        d1.getdata();

        cout<<"Second Object:\n";

        d2.getdata();

    }

 

    switch(ch)

    {

    case 1:

        d3=d1+d2;

        cout<<"Third Object:\n";

        d3.display();

        break;

    case 2:

        d3=d1-d2;

        cout<<"Third Object:\n";

        d3.display();

        break;

    case 3:

        d3=d1*d2;

        cout<<"Third Object:\n";

        d3.display();

        break;

    case 4:

        d3=d1/d2;

        cout<<"Third Object:\n";

        d3.display();

        break;

    case 5:

        if(d1==d2)

            cout<<"Objects are Equal";

        else

            cout<<"Objects are Not Equal";

        break;

    case 6:

        exit(0);

        break;

    default:

        cout<<"Wrong Choice!!!Press any key to exit";

    }

    getch();

    goto top;

}

 

Output:

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…till next post, bye-bye & take care.