Re: realloc problem, corrupt last item

On May 8, 5:36 pm, "Jim Langston" <tazmas...@[EMAIL PROTECTED]
> wrote:
> 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).

in this function i need to reallocate only space for one new item.
*size is the number of items i have in my array.
correct me if i'm wrong, but if i realloc the size of my array+1,
won't this allocate + n items to the original array?


> Jim Langston
> tazmas...@[EMAIL PROTECTED]