Thread: Multiplying overloaded operator

I'm working on this complex function to multiply two complex numbers. A and B are not in the scope of the overloaded function. How do I get the function to read them; do I have to make a separate getFunction()?

Code:

#include <iostream>
using namespace std;

class Complex
{
private:

    double real;
    double img;

public:

    Complex( double realPart = 0.0, double imagPart = 0.0 ) : real(realPart), img(imagPart)
    {
    } // default constructor

    ~Complex(); // destructor

    friend Complex operator*( const Complex &left, const Complex &right );
    friend ostream &operator<<( ostream &output, const Complex &right );
    bool operator!() const; // is entry empty? ***

}; // end class Complex

Complex operator*( const Complex &left, const Complex &right ) 
{
    Complex tmp;
    tmp.real = A.real * B.real - A.img * B.img;
    tmp.img = A.real * B.img + B.real * A.img;
    cout << "C is A * B: " << tmp << "i" << endl;
    // return tmp;
}

ostream &operator<<( ostream &output, const Complex &right )
{
    return output << "(" << right.real << ") + (" << right.img << ")i";
}

bool Complex::operator !() const // is the entry empty?
{
	cout << "Invalid entry." << endl;
	real == 0.0;
	img == 0.0;
}

Complex::~Complex()
{ 
}

int main()
{
    Complex A(-2.5,2.0), B(5.2,1.0), C;
    C = A * B;

    return 0;
}

Well ha! I tried that initially, but had a couple of them switched, so I wasn't getting the correct result. Thanks much for your time Kurt!