inheritance - my first C++ project using class variables and polymorphism -


i've got read many posts here , tutorials, tried failed. don't know what's wrong class instance , inheritance structure. first language java , don't know c++. want join files 1 namespace compiler. corrupt part of code. hope can help, working in months:

<file: activationfunction.h>  ... using namespace std;  namespace bl {  class activationfunction {  // used abstract class   public:  activationfunction() {} virtual double p(double); virtual double derivate(double);     };  class exponential : public activationfunction { /* concrete implementation inherits abstract class */  public:  exponential(){} //seems error ?  double p(double n) {   return 1/(1 + exp(n));  }  double derivate(double n){ double r = 1/(1+exp(n)); return r - (r*r); } };  class ident : public activationfunction{ /* concrete implementation inherits abstract class */   public:  ident(){}  double p(double n){  return n;  }   double derivate(double n){  return 1.0;  }   };  }  <file: neuron.h>  #include...  namespace bl {/* files shall fused 1 namespace different files */  class neuron{ ////seems error    private: double currentactivity; double derivated; activationfunction phi;   public: neuron(activationfunction f_act){ ////////////////////////seems error  phi = f_act; currentactivity = 0; derivated = 0;    neuron(const neuron & n){//how write correct copy constructor ?     currentactivity = n.currentactivity;     derivated = n.derivated;     }      neuron & operator = (const neuron & n){// how write correct assignment operator ?     neuron nscr = n; // necessery ?     if (&nsrc == this)     return *this;     else{     neuron * buffer = this;     this.this = &nscr;     delete buffer;     }      return *this;       }  neuron & operator = (const neuron & nscr){//how write correct assignment operator ? if(&nscr == this)//////not declared in scope error return *this;  = nscr; return *this;  }  }  ... }; }   <file: layer.h>  #include...  using namespace std;  namespace bl {  class weighttable{...};  class layer { // abstract class use of polymorphism (don't know how implement in c++ correctly public:   virtual void connect(layer,layer); // shall override   virtual void connect(layer) = 0; //ideally class have abstract    layer(){}    weighttable in_weight;   vector<neuron> cell;  //vector of neuron objects    unsigned int getnr(void) const{   return neuronnr;   }    protected:   unsigned int neuronnr;   virtual void update(vector<double>,double); /*only derived class should use protected functions */   virtual void calcactivity(void);  };   class hiddenl : public layer {      public:      layer down;     layer top;      hiddenl(unsigned int nr, activationfunction ph){      neuronnr = nr;      //in_weight = null; ?      neuron z; //seems error      for(int n = 0; n < neuronnr ; n++){// initializing class variables      z = neuron(ph);      cell.push_back(z); }                                                }   void update(vector<double> delta, double nu) { ...  down.update(mdelta,nu);//////////////////error caused protected                                                    }  void calcactivity(void) { ...  top.calcactivity(); ///////////////////////////error caused protected                           }  void connect (layer sub, layer up){      down = sub;     top = up;     in_weight = weighttable(neuronnr, down.getnr() + 1, 1);                                        }  void connect(layer x){ assert(false); }  };   class inputlayer : public layer {  layer top; public:  inputlayer(){}  inputlayer(int nr, activationfunction basis) {   neuronnr = nr; neuron x; // use double x; class variable  for(int n = 0; n < neuronnr ; n++){ x = neuron(basis); cell.push_back(x); }                                                }  inputlayer(int nr){  //in_weight = nullptr; ? neuronnr = nr; activationfunction basis = ident(); //seems error neuron x; //seems error  for(int n = 0; n < neuronnr ; n++){ x = neuron(basis);  cell.push_back(x);                }                    }  void connect(layer t){ top = t;                      }  void netactivity(vector<double> data){ ...  top.calcactivity();//error caused protected }  void update(vector<double> end, double n){ return;  }  void calcactivity(void){ return; }  void connect(layer x, layer y){ top = x; }  };  class outl : public layer {  public:  layer down;  outl(){}  outl(int nr){  // „in_weight“ = nullptr; correct ? neuronnr = nr; activationfunction o = ident();  for(int n = 0; n < neuronnr ; n++){ neuron y = neuron(o); cell.push_back(y);                                    } }  void connect(layer dlayer){  down = dlayer;  in_weight = weighttable(neuronnr, down.getnr() + 1, 1);                            }  void bpupdate(vector<double> t, double nu){ ...  down.update(d,nu);//protected                                                     }                                                                     } void calcactivity(void) { ... return;                         }  void update(vector<double> no, double l){ return; }  void connect(layer x, layer y){ down = x; }  };  }  <file: net.h>  #include...  using namespace std;     namespace bl  {  class net{  public:  outl result;  //outl class variable inputlayer input; // inputlayer class variable //////referece-problems  vector<layer> level;  /* vector of layer objects, using polymorphism referece wrong(not type error) */ net(vector<int> m){     int end = m.size() - 1; // last index of m    exponential act = exponential(); /* creating concrete object of activationfunction abstract class */    layer hidden; //a class type variable using polymorphism    input = inputlayer(m[0]); ///////////////scope-error, no idea why//////    level.push_back(input);   // polymorphism///////////////////type-error    for(int l = 1; l < m.size() - 1 ; l++){    hidden = hiddenl(m[l],act);    level.push_back(hidden);//////////////////type-error    }     result = outl(m[end]); ////////////////////////scope-error//////    level.push_back(result);//polymorphism///////////////type-error  input.connect(level[1]); /////////type-error result.connect(level[end-1]);///////////////error/////  for(int h = 1; h < level.size()-1; h++) level[h].connect(level[h-1],level[h+1]); //type-error  } ...  };  }  <file: main.cpp>  #include <iostream> #include <vector> #include "activationfunction.h" #include "neuron.h" #include "weighttable.h" #include "layer.h" #include "net.h"   using namespace std;    int main(int argc, char** argv){   vector<int> form = {1,20,1};  bl::net knn = bl::net(form);  knn.initialize_weights_random(-4.0,4.0); vector<double> in = {4.3}; knn.test(in);    return 0;  }; // right ?

the code posted neither complete or valid, nor readable or understandable.

it looks you're writing sort of neuronal network simulation program. might not best starting problem code in c++ if new language. maybe should step bit , learn basics language first.

some tutorials online:

also, if you're interested in namespace layouts , best practice guidelines, check google c++ style guide:

to automatically check guideline compatibility of cpp code, try using cpplint:

just few pointers started. question malformed here; please restate after went on c++ basics.


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