Complex Numbers

[ohsnap1319]

Hello Everyone!

I am currently working on a program that adds, subtracts, and multiplies complex numbers. However, I am currently getting some very weird errors and I don't know how to fix them. If someone could help me with that, it would be great.

Here is what I have so far:

#include <iostream>

using namespace std;

class Complex {
public:
	double realPart;
	double imaginaryPart;
	Complex();
	Complex(double realPart, double imaginaryPart);
	Complex operator+(const Complex &right);
	Complex operator-(const Complex &right);
	Complex operator*(const Complex &right);
	void PrintComplex();
};

Complex Complex::operator+(const Complex &right)
{
	Complex temp;
	temp.realPart = realPart + right.realPart;
	temp.imaginaryPart = imaginaryPart + right.imaginaryPart;
	return temp;
}

Complex Complex::operator-(const Complex &right)
{
	Complex temp;
	temp.realPart = realPart - right.realPart;
	temp.imaginaryPart = imaginaryPart - right.imaginaryPart;
	return temp;
}

Complex Complex::operator*(const Complex &right)
{
	Complex temp;
	temp.realPart = realPart*right.realPart;
	temp.imaginaryPart = imaginaryPart*right.imaginaryPart;
	return temp;
}

void Complex::PrintComplex()
{
	cout << realPart << " + " << imaginaryPart << "i" << endl;
}

int main()
{
	Complex a(3.5, 2.5);
	Complex b(4.5, 9.6);
	Complex c, d, e;

	c = a + b;
	d = a - b;
	e = a*b;


}

[maikel]

This is beause you did not define your constructor. Yes you did declare it, but the linker will look for the definition and will end up crying for not finding one. Just use something like this: (be sure to change both constructor declarations!)

Complex() {}

Complex (double r, double i)
{
        realPart = r;
        imaginaryPart = i;
}

Second point is more of a mathematical one. Multiplication of complex numbers is the following:

(a + bi) * (c + di) = (ac - bd) + (ad + bc) i

Greatings, Maikel


EDIT: did some changes

[ohsnap1319]

ok thanks for the help...if I have any other problems I will post it here...