Re: previous declaration of Table was here / conflicting types for

Michael.Z wrote, On 03/05/08 08:22:
> Anyone who can help:
> 
> Given a Table.h file I am writing a Table.c file.
> I keep getting the compile error:
> 
> previous declaration of Table was here /  conflicting types for
> 
> 
> I think the problem was the result of two pieces of code.
> First: typedef struct Table;  /* in Table.c*/

This says that Table is a struct.

> Second: struct Table { /*struct definition */ }  *Table;  /* in
> Table.h */

This says it is a pointer to a struct, that is what the * means.

> How can I solve the problems?

By not providing different definitions.

> Here are the two files

<snip>

> typedef void * Table ;

This is not what you said you had and is defining table as yet another
type.

<snip>

> typedef struct Table{
>     int sizeTable;
>     unsigned sizeData;
>     int (*diff)();
>     unsigned (*hash)();
>     void *(*copy)();
>     void (*free)();
> } * Table;


This is what you said. However pointers to void and pointers to structs 
are different things for the simple reason that void and struct are 
different.

Also hiding pointers behind a typedef is generally considered a bad thing.
-- 
Flash Gordon