Call member function on object pointer - c++

Question

I am trying to write a simple game in C++ and currently have my Game_Window class holding an array of pointers to game objects as follows:
class Game_Window {
private:
int width;
int height;
int num_objects;
public:
char** objects;
/* The rest of the class goes here */
}
Inside my Game_Window class I want to define a function that calls the "print()" function on all objects held in the game window "objects" array as follows.
void Game_Window::print_objects() {
for (int i = 0; i < num_objects; i++) {
(objects[i])->print(); /* THE PROBLEM IS HERE */
}
}
When I compile I get the following error:
game_window.cpp:29:15: error: member reference base type 'char' is not a structure or union
(objects[i])->print();
~~~~~~~~~~~~^ ~~~~~
1 error generated.
All objects in my game have a "print()" function so I know that's not the issue. Any help would be much appreciated.

Answer 1

I think I figured it out. I created a class called Game_Object that all my game objects will inherit, and gave it a print() method.
class Game_Object {
private:
Location location;
public:
Game_Object();
Location *get_location() { return &location; }
void print();
};
class Diver : public Game_Object {
public:
explicit Diver(int x, int y);
};
class Game_Window {
private:
int width;
int height;
int num_objects;
public:
Game_Object** objects;
explicit Game_Window(int width, int height);
~Game_Window();
int get_width() { return width; }
int get_height() { return height; }
int get_object_count() { return num_objects; }
bool add_object(Game_Object object);
void print_objects();
};
The invocation of print() is now:
void Game_Window::print_objects() {
for (int i = 0; i < num_objects; i++) {
objects[i]->print();
}
}
I ran it and it game me no errors.

Answer 2

The type of Game_Window::objects is char** (pointer to pointer to char). Hence objects[i] is the ith pointer, and pointers don't have print() methods, which is why (objects[i])->print(); fails with the described error.
Perhaps you meant to use print(objects[i]); instead?