Thread: Simple question on derived classes

Hi all,

I have a derived a class 'box' from my base class 'rectangle'. My main problem is getting my constructor for box to work. My IDE complains that "No default constructor exists for class "rectangle"".

Code:

class box : public rectangle
{
private:
	double height;
public:
	box(double height_val)
	{
		height = height_val;
	}

I've tried passing a parameter to my base class 'rectangle' (red highlight):

Code:

class box : public rectangle
{
private:
	double height;
public:
	box(double height_val) : rectangle(height_val)

After doing that it gives a syntax error with "+2 overloads". My base constructor rectangle looks like this:

Code:

rectangle(double length_val, double width_val)

What am I doing wrong?

Thanks for your help in advance.