Re: realloc problem, corrupt last item

Igal wrote:
> hay, i have this werid problem with my book adding function, this how
> it looks
>
> book* AddBook(book *bp, unsigned *size) {
> ...
> //then i use realloc to allocate space for the new item in the bp
> pointer
> bp = (book*)realloc(bp, sizeof(book));

realloc accepts the pointer to the prevoiusly allocated block, and the new

size.  Since you are passing sizeof( book ) you are only allocating enough

space for 1 item.

You probably meant something like:
bp = realloc( bp, sizeof( book ) * *size );
or
bp = realloc( bp, sizeof( book ) * (*size + 1) )
or something.  I'm not sure how many additional items you want to allocate

for nor what size represents (new size or old size).

> ...
> }
>
> when i do this, the next them is added in this right space. but let's
> say *bp hold 2 book type items, first item will be ok, second one will
> get garbage content, then the third item (the new reallocated one)
> will get the new data.
> i just have no idea will the last item gets corruped, this also
> happens with more items in array.
>
> i know that to use linked lists is a lot better solution, but i still
> dunno how to use them right just yet.



-- 
Jim Langston
tazmaster@[EMAIL PROTECTED]