Inheriting private members from base class to derived classes c++

Question

I'm trying to inherit the name,skeletonType, and numLegs from my base class to my derived class. I have a base class named Invertebrates and derived class named Spider. I want to be able to use the private variables with the derived class from my base class. I keep getting a compiling error on line 47 and it says expected primary-expression before ','.

I'm trying to get my output to look like this:

Spider:Brown Recluse, number of legs = 8, skeleton type = EXOSKELETON

Could someone help me out and point me in the right direction please. Here is what I put together so far.

// invertebrates.h
// invertebrate specifications

#ifndef _INVERTEBRATE_H_
#define _INVERTEBRATE_H_

#include <iostream>

using namespace std;

enum Skeleton_Type { NONE, HYDROSTATIC, EXOSKELETON };

class Invertebrate {
  private:
    string name;
    Skeleton_Type skeletonType;
    int numLegs;
  protected:
    void setSkeletonType(Skeleton_Type skeletonType);
    void setNumLegs(int numLegs);
  public:
    Invertebrate();
    Invertebrate(string name, Skeleton_Type skeletonType, int numLegs);
    string getName();
    Skeleton_Type getSkeletonType();
    int getNumLegs();
    virtual void print() = 0;
};

class Spider : public Invertebrate {
  private:
    const string NAME_PREFIX = "Spider: ";
  public:
    Spider();
    Spider(string name);
    virtual void print();
};
#endif // _INVERTEBRATE_H_ 
**********************************************************************

//invertebrates.cpp

#include "invertebrate.h"

void Invertebrate::setSkeletonType(Skeleton_Type skeletonType)
{
     this->skeletonType = skeletonType;
}

void Invertebrate::setNumLegs(int numLegs)
{
    this->numLegs = numLegs;
}
Invertebrate::Invertebrate()
{
    name = "noName";
    skeletonType = NONE;
    numLegs = 0;
}

Invertebrate::Invertebrate(string name, Skeleton_Type skeletonType, int     numLegs)
{
    this->name = name;
    this->skeletonType = skeletonType;
    this->numLegs = numLegs;
}

string Invertebrate::getName()
{
    return this->name;
}

Skeleton_Type Invertebrate::getSkeletonType()
{
    return this->skeletonType;
}

int Invertebrate::getNumLegs()
{
    return this->numLegs;
}


Spider::Spider(string name):Invertebrate(name,EXOSKELETON,8)
{
    name =   Invertebrate::getName();
}



void Spider::print()
{
    string strSkType = "";
    if(this->getSkeletonType() == 0)
          strSkType= "none";
    else if(this->getSkeletonType() == 1)
          strSkType= "Hydrostatic";
    else if(this->getSkeletonType() == 2)
          strSkType= "exoskeleton";

    cout << this->NAME_PREFIX + getName();
    cout << ", number of legs = " << this->getNumLegs() << ", skeleton type = " << strSkType << endl;
 }


int main()
{
    Spider *sp = new Spider("Brown Recluse");
    sp->print();

    return 0;
}

OUTPUT:

Answer 1

Here are the issues in your code :-

1. In .h file -

const string NAME_PREFIX = "Spider: ";

is not a valid way to initialize cont members - const should be initialized through constructor initializer list (till C++11).

Correct way in .cpp

Spider::Spider(string name):NAME_PREFIX(name),Invertebrate(name,EXOSKELETON,8)
{
    name = NAME_PREFIX + Invertebrate::getName();
}

2. In the same constructor you have written name&, which is wrong, just pass name.

Spider::Spider(string name):NAME_PREFIX(name),Invertebrate(name,EXOSKELETON,8)