Problem Multiple definition of enum

[puneetsardana88]

Hi

I was implementing BFS and DFS

So I have three class stack,queue,nod e and main class

I have put Node class in Node.h

#define SIZE_NEIGHBOURS 10
#define SIZE_GRAPH 100
#include<iostream>
enum STATUS{ready=0,waiting=1,processed=2};
class Node
 {
     public:
     char info;
     int distance;
      STATUS node_status;
     Node *adjacent[SIZE_NEIGHBOURS];
     Node *next;
     Node()
     {
        // cout<<"Hui";
         info=0;
         distance=0;
         next=NULL;
         node_status=ready;
         for(int i=0;i<SIZE_NEIGHBOURS;i++)
            adjacent[i]=NULL;
     }
 };

I #include"node.h " in both stack and queue headers..

Now when I #include"stack. h" and #include"queue. h" I got an error multiple definition of enuf status. I know the reason that it is defined twice

1) node of stack
2) node of queue
Whats the possible solution to avoid this???Please help...

[RedSon]

Your names are colliding with standard names, please try renaming your class names to something a bit different and try again.

[Banfa]

You include files should use multiple include protection mechanisms, the most ubiquitous being use of preprocessor symbols like this

#ifndef NODE_H_INCLUDED
#define NODE_H_INCLUDED

// Declarations and definitions of node.h

#endif

This will stop the declarations in node.h being processed more than once which is what the problem is.

[puneetsardana88]

@Redson

It worked earlier with same names

@banfa

I copy pasted the code(of yours) it still gave same error...Now what i did

#ifndef SIZE_GRAPH
#define SIZE_NEIGHBOURS 10
#define SIZE_GRAPH 100
#include<iostream>
enum STATUS{ready=0,waiting=1,processed=2};
class Node
 {
     public:
     char info;
     int distance;
      STATUS node_status;
     Node *adjacent[SIZE_NEIGHBOURS];
     Node *next;
     Node()
     {
        // cout<<"Hui";
         info=0;
         distance=0;
         next=NULL;
         node_status=ready;
         for(int i=0;i<SIZE_NEIGHBOURS;i++)
            adjacent[i]=NULL;
     }
 };
#endif

It worked....Can you please tell me what you were saying?Hope I ll learn something...And thanks for your help

[puneetsardana88]

got the answer

it should be

#ifndef NODE_H
#define NODE_H

Many Thanks to all