Are you able to set the value of an array of pointers to classes equal to a pointer to a class

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Assuming that there is a functional program built around this will the following work:

C++

Item** items;
Item* item;
int nItems;

items[nItems] = item;

Or would I have to set each member variable of each instance of Item more like this:

C++

int newId = item->getId();


items[i]->setID(newId);

Posted 9-Oct-15 13:11pm

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Matt T Heffron 9-Oct-15 19:40pm

Well items is: pointer to (an array of) pointer(s) to an Item, but items is never initialized to point to the array so, first of all, items needs to be set to point at the (newly allocated) array.

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George Jonsson · Answer 1 · 2015-10-09T17:22:00

The first option will work with some modifications, provided that the variables are initialized properly.

C++

int nItems = 5;
Item** items = (Item**)calloc(nItems, sizeof(Item*));
Item* item = new Item(); // If Item is a class

items[nItems] = item;  // nItems will be outside the length of the array
items[0] = item;



// Cleanup
if (items != null)
{
    for (int i=0; i<nitems;>    {
        if (items[i] != null)
            delete items[i];
    }
    free(items);
    items = null;
}