On 9/15/07, Nicholas Blatter <[EMAIL PROTECTED]> wrote:
> I remember seeing some discussion before about a problem in C++ so I
> thought I might send one of my own. It has been a looong time since
> I've done much at all in C++ and I'm having problems with some
> (seemingly simple) memory management.
>
> I'm trying to expand an array of cstrings with a function call. I'm
> sure there's something simple I'm not remembering... here's the whole
> thing:
[snip]
> void GrowArray(char ** array, int oldSize, int newSize)
> {
> char ** temp = new char * [newSize];
>
> for (int i = 0; i < oldSize; i++)
> temp[i] = array[i];
>
> delete [] array;
> array = temp;
> }
>
The problem is that the char ** pointer that points to the words array
is being passed to GrowArray() by value and not by reference. Thus the
pointer to the new array you create inside the function is lost as
soon as you return out of it, since the variable array is only a copy
of the pointer to words and not the original pointer itself. Change
the function declaration to this (if I recall the syntax for passing a
pointer by reference) and that should fix it:
void GrowArray(char ** & array, int oldSize, int newSize)
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