Answer to Question #248853 in C++ for Avi

Question

Write a program to multiply two complex number and stored in third one by the concept of operator overloading using member function.

Answer 1

#include <iostream>


using namespace std;


class ComplexNumber
{
private:
    double realPart;
    double imaginaryPart;


public:
    ComplexNumber()
    {
        realPart = 0;
        imaginaryPart = 0;
    }


    ComplexNumber(double realPart, double imaginaryPart)
    {
        this->realPart = realPart;
        this->imaginaryPart = imaginaryPart;
    }


    friend ComplexNumber operator *(ComplexNumber firstNumber, ComplexNumber secondNumber)
    {
        double realPart = firstNumber.realPart * secondNumber.realPart;
        double imaginaryPart = firstNumber.imaginaryPart * secondNumber.imaginaryPart;


        return ComplexNumber(realPart, imaginaryPart);
    }


    void print()
    {
        if(realPart == 0 && imaginaryPart == 0)
            cout << realPart;
        else if(realPart == 0)
            cout << imaginaryPart << "i";
        else
        {
            cout << realPart;
            if(imaginaryPart > 0)
                cout << "+";
            cout << imaginaryPart << "i";
        }


    }
};


int main()
{
    ComplexNumber firstNumber(2,3);
    ComplexNumber secondNumber(4,-6);


    cout << "First complex number: ";
    firstNumber.print();
    cout << endl;


    cout << "Second complex number: ";
    secondNumber.print();
    cout << endl << endl;


    ComplexNumber resultOfMultiplication = firstNumber * secondNumber;
    cout << "Result of multiplication: ";
    resultOfMultiplication.print();


    cout << endl << endl;


    return 0;
}