Inheritance

what the hell? i didnt do anything wrong lol. so far as i can see...

linkedList.h

Code:

class linkedList:public linkedQueue
{
      public:
             linkedList();
             ~linkedList();
      
      private:

};

linkedQueue.h

Code:

struct Node 
{
       int elem;
       Node *next; 
};

class linkedQueue
{  
      typedef int el_t;
         
      public:
             linkedQueue();
             ~linkedQueue();
             
             void addRear(el_t newNum);
             void deleteFront();
             
             bool isEmpty();
             int getSize();
             void displayAll();
             
      private:
              int count;
              Node *front,*rear,*temp;//front and rear used to show the front
                                      //and the rear of the queue respectivley.
                                      //temp is used for deleteing elements
              void queueError(char* mesg);
};

it keeps saying 'expected class-name before '{' token'

Are you including linkedQueue.h in your linkedList.h?

--
Mats

ya i tried including it and not including it. this is what i have for the whole files...

linkedList.h

Code:

#ifndef linkedList_H
#define linkedList_H

#include<iostream>
#include "linkedQueue.h"

using namespace std;

class linkedList:public linkedQueue
{
      public:
             linkedList();
             ~linkedList();
             
             void addFront(el_t newNum);
             void deleteRear(el_t& oldNum);
             int search(el_t& key);
             void deleteIth(int I,el_t& oldNum);
      
      private:

};

#endif //linkedList_H

linkedQueue.h

Code:

#ifndef linkedQueue_H
#define linkedQueue_H

#include<iostream>

using namespace std;

struct Node 
{
       int elem;
       Node *next; 
};

class linkedQueue
{  
      typedef int el_t;
         
      public:
             linkedQueue();
             ~linkedQueue();
             
             void addRear(el_t newNum);
             void deleteFront();
             
             bool isEmpty();
             int getSize();
             void displayAll();
             
      private:
              int count;
              Node *front,*rear,*temp;//front and rear used to show the front
                                      //and the rear of the queue respectivley.
                                      //temp is used for deleteing elements
              void queueError(char* mesg);
};


#endif

Not sure what's wrong, but don't use "using namespace std" in a header-file - that wil screw up the entire system of "namespaces".

Oh, and don't put "Node *temp; // used for deleting" inside your class - it just occupies extra space, and since it's just a temporary that isn't needed for to be kept around, it's doesn't belong in the class - it belongs in the delete member function.

Can you post the exact error message with line numbers, please.

--
Mats

ooo, good advice about the temp thanks. i think i got it now, seemed to be something with my ide. it was telling me that i had invalid classes and they couldnt be found even though they were there, i messed around witht the project settings and seemed to have gotten it. btw which ide would you reccommend? im using dev C++ at the moment.

I'm a bit old-fashioned, so I often use Emacs and gcc on standalone - but Visual Studio Express is a slick environment with very good integration of all necessary tools - Windows only, of course.

--
Mats

ya ive still to try and use visual studio. well thanks a lot for all your advice, it really helped me out.

You should also make your destructors virtual, otherwise the wrong destructor might get called and leak resources.