C++ Binary operator overloading
C++ Operator Overloading and Function Overloading
Binary operators require two operands. Below are examples of binary operators. The addition operator ( + ), subtraction operator ( - ), multiplication operator ( * ), and division operator ( / ) we commonly use are all binary operators. Like the addition ( + ) operator.
The following example demonstrates how to overload the addition operator ( + ). Similarly, you can also try overloading the subtraction operator ( - ) and the division operator ( / ).
Example
#include <iostream>
using namespace std;
class Box
{
double length; // Length
double breadth; // Width
double height; // Height
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 the + 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;
}
};
// The main function of the program
int main( )
{
Box Box1; // Declare Box1 of type Box
Box Box2; // Declare Box2 of type Box
Box Box3; // Declare Box3 of type Box
double volume = 0.0; // Store the volume in this variable
// Box1 details
Box1.setLength(6.0);
Box1.setBreadth(7.0);
Box1.setHeight(5.0);
// Box2 details
Box2.setLength(12.0);
Box2.setBreadth(13.0);
Box2.setHeight(10.0);
// Volume of Box1
volume = Box1.getVolume();
cout << "Volume of Box1 : " << volume <<endl;
// Volume of Box2
volume = Box2.getVolume();
cout << "Volume of Box2 : " << volume <<endl;
// Add the two objects to get Box3
Box3 = Box1 + Box2;
// Volume of Box3
volume = Box3.getVolume();
cout << "Volume of Box3 : " << volume <<endl;
return 0;
}
When the above code is compiled and executed, it produces the following results:
Volume of Box1 : 210 Volume of Box2 : 1560 Volume of Box3 : 5400other extensions