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Templates Class

GGWPBOT (35)
Can someone please tell me whats missing
It shows that there is an error and i cant figure out what it is
It used to be normal class but i have been asked to make it template class
and these problems showed up.

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#include <iostream>
using namespace std;

template <class T> class Complex
{
private:
	double real;
	double imag;

public:
	Complex()
	{
		real = 0;
		imag = 0;
	}

	Complex(double x, double y)
	{
		real = x;
		imag = y;

	}

	void setReal(double x)
	{
		real = x;
	}

	void setImag(double x)
	{
		imag = x;
	}

	double getReal()
	{
		return real;
	}

	double getImag()
	{
		return imag;
	}

	Complex& operator =(Complex &x)
	{
		real = x.getReal();
		imag = x.getImag();
		return *this;
	}

	Complex operator +(Complex &x)
	{
		Complex temp;
		temp.setReal(x.getReal() + real);
		temp.setImag(x.getImag() + imag);
		return temp;

	}

	Complex operator -(Complex &x)
	{
		Complex temp;
		temp.setReal(x.getReal() + real);
		temp.setImag(x.getImag() + imag);
		return temp;

	}
	Complex operator *(Complex &x)
	{
		Complex temp;
		temp.setReal(x.getReal() * real);
		temp.setImag(x.getImag() * imag);
		return temp;

	}

};

bool operator ==(Complex& a, Complex& b)
{

	return (a.getReal() == b.getReal() && a.getImag() == b.getImag());
};

ostream& operator<<(ostream& out, Complex& c)
{
	out << c.getReal() << '+' << c.getImag() << 'i';
	return(out);
}
int main()
{
	Complex <int, int> x(1, 2);
	Complex <int, int> y(2, 3);
	Complex <int, int> z, w, v;


	z = x + y;
	w = x - y;
	v = x * y;



	if (z == w)
		cout << " z = w" << endl;
	else
		cout << " z != w" << endl;

	cout << "z= " << z << endl << "w= " << w << endl << "v= " << v << endl;



	Complex <float, float> x2(1.3, 2.3);
	Complex <float, float> y2(2.4, 3.4);
	Complex <float, float> z2, w2, v2;

	z2 = x2 + y2;
	w2 = x2 - y2;
	v2 = x2 * y2;

	if (z2 == w2)
		cout << " z2 = w2" << endl;
	else
		cout << " z2 != w2" << endl;



	system("PAUSE");
	return 0;
}
Last edited on
ne555 (10692)
> Can someone please tell me whats missing
the error messages are.


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bool operator ==(Complex& a, Complex& b)
{

	return (a.getReal() == b.getReal() && a.getImag() == b.getImag());
};
foo.cpp|74 col 24| error: missing template arguments before ‘&’ token
||  bool operator==(Complex& a, Complex& b)
||                         ^
There is no stand alone complex.
Complex is a template, and you should refer to it as one.

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template<class T>
bool operator ==(Complex<T>& a, Complex<T>& b)
{

	return (a.getReal() == b.getReal() && a.getImag() == b.getImag());
};

If your function will not modify its parameter, then pass them as constant references. In your case you'll also need to define .getReal() as a constant function.
GGWPBOT (35)
ok i fixed what you mentioned but it still there is a problem with:
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Complex <int, int> x(1, 2);
Complex <int, int> y(2, 3);
Complex <int, int> z, w, v;


and 

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Complex <float, float> x2(1.3, 2.3);
Complex <float, float> y2(2.4, 3.4);
Complex <float, float> z2, w2, v2;


It says too many arguments

here is the complete code
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#include <iostream>
using namespace std;

template <class T> class Complex
{
private:
	double real;
	double imag;

public:
	Complex()
	{
		real = 0;
		imag = 0;
	}

	Complex(double x, double y)
	{
		real = x;
		imag = y;

	}

	void setReal(double x)
	{
		real = x;
	}

	void setImag(double x)
	{
		imag = x;
	}

	double getReal()
	{
		return real;
	}

	double getImag()
	{
		return imag;
	}

	Complex& operator =(Complex &x)
	{
		real = x.getReal();
		imag = x.getImag();
		return *this;
	}

	Complex operator +(Complex &x)
	{
		Complex temp;
		temp.setReal(x.getReal() + real);
		temp.setImag(x.getImag() + imag);
		return temp;

	}

	Complex operator -(Complex &x)
	{
		Complex temp;
		temp.setReal(x.getReal() + real);
		temp.setImag(x.getImag() + imag);
		return temp;

	}
	Complex operator *(Complex &x)
	{
		Complex temp;
		temp.setReal(x.getReal() * real);
		temp.setImag(x.getImag() * imag);
		return temp;

	}

};

template<class T>
bool operator ==(Complex<T>& a, Complex<T>& b)
{

	return (a.getReal() == b.getReal() && a.getImag() == b.getImag());
};

template<class T>
ostream& operator<<(ostream& out, Complex& c)
{
	out << c.getReal() << '+' << c.getImag() << 'i';
	return(out);
}

int main()
{
	Complex <int, int> x(1, 2);
	Complex <int, int> y(2, 3);
	Complex <int, int> z, w, v;


	z = x + y;
	w = x - y;
	v = x * y;



	if (z == w)
		cout << " z = w" << endl;
	else
		cout << " z != w" << endl;

	cout << "z= " << z << endl << "w= " << w << endl << "v= " << v << endl;



	Complex <float, float> x2(1.3, 2.3);
	Complex <float, float> y2(2.4, 3.4);
	Complex <float, float> z2, w2, v2;

	z2 = x2 + y2;
	w2 = x2 - y2;
	v2 = x2 * y2;

	if (z2 == w2)
		cout << " z2 = w2" << endl;
	else
		cout << " z2 != w2" << endl;



	system("PAUSE");
	return 0;
}
ne555 (10692)
> It says too many arguments
foo.cpp|88 col 18| error: wrong number of template arguments (2, should be 1)
|| Complex<int, int> x (1, 2);
Complex<int> x(1,);

If you want to have different types for `real' and `imag'...
you don't even use the template parameter, ¿why is it a template then?
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