Operator overloading issue.

[Banhas]

Good evening.

I'm making a Line class and whilst overloading a few operators I ran into some issues.

 istream& operator>>(std::istream& in, const Line& ln)
{
	double slope, intercept;
	cin >> slope;
	cin >> intercept;
	ln = Line(slope, intercept); //error occurs here
	return in;
}

Line& Line::operator= (const Line &lSource)
{
	if(this == &lSource)
		return *this;

    m = lSource.getIntersept();
	b = lSource.getSlope();
 
    return *this;
}

And the error being:

Error	4	error C2678: binary '=' : no operator found which takes a left-hand operand of type 'const Line' (or there is no acceptable conversion)	

Any idea whats going on?

[Peter87]

Make ln not const in operator>>.

[Banhas]

Oh that was dumb.Thanks for the help mate!

[Peter87]

Is there two doubles to read? Otherwise cin will wait until there are.