does not have class type C++

Question

This is one class from my program! When I\'m trying to compile the whole program, I get an error message like this:

main.cpp:174: error: \'((Scene*)this)

Answer 1

Your problem is in the following line:

Lake lake(int L);

If you're just trying to declare a Lake object then you probably want to remove the (int L). What you have there is declaring a function lake that returns a Lake and accepts an int as a parameter.

If you're trying to pass in L when constructing your lake object, then I think you want your code to look like this:

class Scene
{
    int L,Dist;
    Background back ;
    Lake lake;
    IceSkater iceskater;
public :
    Scene(int L, int Dist) :
        L(L),     
        Dist(Dist),
        lake(L),
        iceskater(Dist)
    {
        cout<<"Scene was just created"<<endl;
    }
.....

Notice the 4 lines added to your constructor. This is called member initialization, and its how you construct member variables. Read more about it in this faq. Or some other tidbits I found here and here.

Answer 2

You've declared (but never defined) lake as a member function of Scene:

class Scene
{
    // ...
    Lake lake(int L);

But then in plot, you try to use lake as if it were a variable:

int plot()
{
    lake.light_up();

Answer 3

Replace the line Lake lake(int L); with Lake lake= Lake(L); or with this: Lake lake{L};

Answer 4

You declare lake as a method that takes one argument and returns a Lake. You then try and call a method on it via lake.light_up(). This causes the error you observe.

To solve the problem, you either need to declare lake to be a variable, e.g. Lake lake;, or you need to stop trying to call a method on it.