#include <iostream>
#include <stdio.h>

#ifndef node_
#define node_

class node {

public:
		  node(char *aname=0);
		  virtual ~node() { delete [] name;}
public: 
		  node &getknext(int k);
		  node &get_next(){return *pnext;}
		  node *addnext(node *an);
		  bool isLast(){return pnext==0;}
		  double set_h(double aval);
		  const double get_h() {return h;}
		  double adderr(double derr){d+=dfa()*derr; err_ready=true; return d;}
		  virtual double eval() {eval_ready=true; return h;}
		  virtual double fa(){return h;}
		  virtual double dfa(){return 1.0;}
		  virtual void reset() {eval_ready=false;}
		  virtual void reset_err() {err_ready=false;}
		  double operator=(double val) {
					 	eval_ready=true; return h=val;
		  				}
		  double operator=(node &val) {
					 	eval_ready=true; return h=val.get_h();
		  				}
		  int getCount(int st=0){
					 	if(!pnext) return st+1; 
						return pnext->getCount(st+1);
		  				}
protected:
		  node *pnext;
		  double h;
		  double d;
		  bool eval_ready;
		  bool err_ready;
		  int ncount;
		  char *name;
};

class neuron : public node{

public:
		  neuron(char *aname=0);
		  ~neuron();
		  node &operator[](int k);
		  node &connect(node *an);
		  virtual void initw();
		  virtual double fa();
		  virtual double dfa();
		  double eval();
		  virtual void bpg();
		  virtual void dw(double n);
		  void dumpw();
		  void reset();
		  void reset_err();

private:
		  const node &get_finput() {return *pinput;}
		  
protected:
		  node *pinput;
		  double *pw;
		  double w0;
};


#endif