CODEWITHSUNDEEP
ctypedef
CDT
CDT

Reputation: 10621

typedef - does not name a type

i have two headers

in header “BinTree.h":

typedef struct node {
    ElemType data;
    struct node *lchild;
    struct node *rchild;
}BTNode;

in header "Queue.h"(which includes BinTree.h):

typedef BTNode* Dataype;

at compiling the compilor said: error: ‘BTNode’ does not name a type

What's wrong?

Upvotes: 2

Views: 15435

Answers (2)

SomeWittyUsername
SomeWittyUsername

Reputation: 18348

If you have mutual inclusion you need a forward declaration of your node type. Add this before the typedef: typedef struct node BTnode;

Upvotes: 1

Ed Heal
Ed Heal

Reputation: 59997

Did you include BinTree.h in Queue.h before the declaration?

Or have you .cpp (or moral equivalent) include it beforehand

EDIT FOR CDT

Forward declarations are the answer.

As you did not post the code it is difficult to tell.

But I would hazzard a guess here

typedef struct node BTNode;

whould hit the ticket in Queue.h

Upvotes: 2

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