C++ Overloading (Operator and Function)

Function Overloading in C++

#include<iostream>
using namespace std;

class printData
{
public:
    void print(int i)
    {
        cout<<"printing int: "<<i<<endl;
    }
    void print(double f)
    {
        cout<<"Printing float: "<<f<<endl;
    }
    void print(char*  c)
    {
        cout<<"Printing character:"<<c<<endl;
    }
};
int main(void)
{
    printData pd;

//call print to print integer
    pd.print(5);
//call print o print float
    pd.print(500.263);
//call print to print character
    pd.print("Hello c++");
    return 0;
}

Operator Overloading in c++

we would have to pass two arguments for each operand as follows:

Box operator+(const Box&, const Box&);

example:

#include<iostream>

using namespace std;

class Box{

public:
    double getVolume(void)
    {
        return length*breadth*height;
    }
    void setLength(double len)
    {
        length=len;
    }
    void setBreadth(double bre)
    {
        breadth=bre;
    }
    void setHeight(double hei)
    {
        height=hei;
    }
    //overload + operator to add two Box objects.

    Box operator+(const Box& b)
    {
        Box box;
        box.length=this->length+b.length;
        box.breadth=this->breadth+b.breadth;
        box.height=this->height+b.height;
        return box;
    }
private:
    double length; //Length of a box
    double breadth; //Breadth of a box
    double height;  //Height of a box
};

//Main function for the program
int main()
{
Box Box1;
Box Box2;
Box Box3;

double volume=0.0;

//box1 specification

Box1.setLength(6.0);
Box1.setBreadth(7.0);
Box1.setHeight(5.0);

//box 2 specification

Box2.setLength(12.0);
Box2.setBreadth(13.0);
Box2.setHeight(10.0);

//Volume of box 1
volume=Box1.getVolume();
cout<<"Volume of Box1: "<<volume<<endl;


//volume of box 2
volume=Box2.getVolume();
cout<<"Volume of Box2: "<<volume<<endl;


//Add two object as follows:
Box3=Box1+Box2;

//volume of box3

volume = Box3.getVolume();
cout<<"Volume of Box3: "<<volume<<endl;

    return 0;
}

Output:

Reference:
http://www.tutorialspoint.com/cplusplus/cpp_overloading.htm

There are some examples for various operators and list.You can go to reference link for this.Here I am pausing this as I am going to switvh to java as java is good for OOP. But I will be back to this C++ series if I get my free time again. 🙂

And If I get time I have a plan to start blogging about C++ vector, STL and Template library that is very helpful for contest programming.