class member access denied
Hi, I need some help with this topic...
I've got a base clase "layer" like this :
class layer
{
protected:
int num_inputs;
int num_outputs;
float *outputs;
float *inputs;
friend network;
friend kohonen_network;
public:
layer();
virtual ~layer();
virtual int calc_out()=0;
};
two dervide classes of "layer"
class input_layer : public layer
{
private:
public:
input_layer(int,int);
~input_layer();
virtual int calc_out();
};
class network
{
private:
layer *layer_ptr[MAX_LAYERS];
int number_of_layers;
int layer_size[MAX_LAYERS];
float *buffer;
fpos_t position;
unsigned training;
public:
network();
virtual ~network();
void set_training(const unsigned &);
unsigned get_training_value();
void get_layer_info();
void set_up_network();
void randomize_weights();
void update_weights(const float);
void write_weights(FILE *);
void read_weights(FILE *);
void list_weights();
void write_outputs(FILE *);
void list_outputs();
void list_errors();
void forward_prop();
void backward_prop(float &);
float fill_IObuffer(FILE *);
int set_up_pattern();
};
class kohonen_layer: public layer
{
protected:
float *weights;
int winner_index;
float win_distance;
int neighborhood_size;
friend kohonen_network;
public:
kohonen_layer(int,int,int);
virtual ~kohonen_layer();
virtual int calc_out();
void randomize_weights();
void update_neigh_size(int);
void update_weights(const float);
void list_weights();
void list_outputs();
float get_win_dist();
};
And another class :
class kohonen_network
{
private:
layer *layer_ptr[2];
int layer_size[2];
int neighborhood_size;
float alpha;
public:
kohonen_network();
virtual ~kohonen_network();
void get_layer_info(int,int);
int set_up_network(int);
void randomize_weights();
void update_neigh_size(int);
void update_weights(const float);
void list_weights();
void list_outputs();
void list_structure(CFile *);
void get_next_vector(CFile *);
void process_next_pattern();
float get_win_dist();
int get_win_index();
int train_network(CFile *inputfile,int period);
};
In kohonen_network class I've declared the member layer_ptr as array of
layer *.
When I'm creating an object of this class I do the following :
layer_ptr[0] = new input_layer(0,layer_size[0]);
layer_ptr[1] = new
kohonen_layer(layer_size[0],layer_size[1],neighborhood_size);
So I've redefined each element with a distinct derived class of layer.
My problem is : when I'm trying to get the weights member of kohonen_layer
class thru this statement :
layer_ptr[1].weights , wich is in a kohonen_network function member (note
tha kohonen_network is declares as friend so has access to private or
protectes members )
I get the following compiler error : error C2039: 'weights' : is not a
member of 'layer'
So, I define an array of pointers to a base class, then , assign each
pointer a derived class, but, I can't acces to member of the derived class ?
I'm compiling this with a Microsoft C++ Compiler.
Thanks in advance.
