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Operator overloading
Further C++ Object Oriented features example from a Well House Consultants training course
More on Further C++ Object Oriented features [link]

This example is described in the following article(s):
   • Operator overloading - redefining addition and other Perl tricks - [link]

Source code: cube.cpp Module: C234
#include <iostream.h>

/*

Demonstration of operator overloading in C++

*/


class Cube {
        public:
                Cube::Cube(float inx, float iny, float inz);
                Cube operator+ (const Cube &);
                float Cube::getX();
                float Cube::getY();
                float Cube::getZ();
                void Cube::report(char *descr);
        private:
                float x;
                float y;
                float z;
};

Cube::Cube(float inx, float iny, float inz) {
        x = inx; y = iny; z = inz;
        }

Cube Cube::operator+ (const Cube & second) {
        float newx = (x > second.x) ? x : second.x;
        float newy = (y > second.y) ? y : second.y;
        float newz = z + second.z;
        return Cube(newx,newy,newz);
        }

float Cube::getX () {
        return x;
        }
float Cube::getY () {
        return y;
        }
float Cube::getZ () {
        return z;
        }

void Cube::report(char *descr) {
        cout << descr << " "
                << this->getX()
                << " by " << this->getY()
                << " by " << this->getZ()
                << endl;
        }

int main () {
        Cube Compaq = Cube(33.0,17.0,3.0);
        Cube Powerbook = Cube(39.0,16.0,1.8);
        Cube Combo = Compaq + Powerbook;

        Compaq.report("Compaq Evo N1050v");
        Powerbook.report("17\" Powerbook G4");
        Combo.report("Both computers together");

}

Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in C++
 * C++ for C Programmers
 * C and C++ Programming
Also available on on site courses for larger groups

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Other Examples
This example comes from our "Further C++ Object Oriented features" training module. You'll find a description of the topic and some other closely related examples on the "Further C++ Object Oriented features" module index page.

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