Question

I am trying to build a Linked list application using C++ programming language & features such as inheritance etc.

I have split the interface & implementation in different files but not able to compile.

Below are the list of files

Interface files :- node.h , abstractList.h , singleLinkedList.h

Implementation files: singleLinkedList.cpp

node.h

#ifndef NODE_H
#define NODE_H

#include <iostream>

struct nodeType {
        int data;
        struct nodeType *next;
}listNode;


#endif

abstractList.h

#ifndef ABSTRACT_LIST_H
#define ABSTRACT_LIST_H

#include <iostream>
#include "node.h"
#include "singleLinkedList.h"

class abstractList {
        public:
        virtual ~abstractList();
        virtual bool isEmpty(Node* ) = 0;
        virtual int get(const int&) = 0;
        virtual int indexOf(const int& ) = 0;
        virtual Node insert(const int& , const int& ) = 0;
        virtual void delete(const int& ) = 0;
};

#endif

singleLinkedList.h

#ifndef SINGLE_LIST_H
#define SINGLE_LIST_H

#include <iostream>
#include "node.h"
#include "abstractList.h"

class singleLinkedList : public abstractList {

        public:

        singleLinkedList();
        ~singleLinkedList();
        Node populateList( );

        private:

        void checkIndex();
        int data;
        Node head;
};

#endif

So far i have just coded the populateList() function in the implentation file, here goes the implementation file.

singleLinkedList.cpp

#include <iostream>
#include "node.h"
#include "singleLinkedList.h"
#include "abstractList.h"


    Node singleLinkedList :: populateList()
    {
            Node temp;
            int data;
            temp = head;
            char ch;
            std::cout<<"Enter Data? (y/n) " << std::endl;
            std::cin>>ch;

            while(ch == 'Y' || ch == 'y')
            {
                    std::cout<<"Enter the data that you would like to store.\n"<<std::endl;
                    std::cin>>data;
                    temp = new Node();
                    temp->data = data;
                    temp->next = head;
                    head = temp;
                    std::cout<<"Enter more data?"<<std::endl;
                    std::cin>>"\n">>ch;
            }

            return temp;
    }

When i give g++ -c singleLinkedList.cpp , i am getting lot of errors. I am pretty sure i have done something stupid. Can anyone please pin point my error?

EDIT: Error Log With specfic issues.

struct nodeType {
int data;
struct nodeType *next;
}listNode;

virtual listNode *insert();

Is the above statement correct?

Thanks
Kelly

Answer 1

delete is a keyword in C++, you can’t use it as a method name. You need to use a different name here:

class abstractList {
        public:
        //...
        virtual void delete(const int& ) = 0;
        //-----------^^^^^^ rename this.
};