Initialising array of pointers
Author
I have an array of 4 pointers in a class called QuadTree.
In my constructor, how do I initialize each of these pointers to NULL
class QuadTree {
public:
QuadTree();
~QuadTree();
private:
QuadTree *children[4];
}
Like this:
QuadTree::QuadTree():children(NULL) {}
or like this:
QuadTree::QuadTree() {
for (int i = 0; i < 4; i++) children = NULL;
}
Thanks,
Edo
Like this:
class QuadTree {
public:
QuadTree();
~QuadTree();
private:
(QuadTree*) children[4];
}
QuadTree::QuadTree() {
for (int i = 0; i < 4; i++) children = NULL;
}
class QuadTree {
public:
QuadTree();
~QuadTree();
private:
(QuadTree*) children[4];
}
QuadTree::QuadTree() {
for (int i = 0; i < 4; i++) children = NULL;
}
quote:Original post by edotorpedo
QuadTree::QuadTree():children(NULL) {}
bad idea, will only set the pointer to the pointers to null
for-loop. does the right thing and a good compiler will probably optimize it.
memset(children, 0, 4*sizeof(QuadTree*));
probably too "low level" for some peoples taste *g*
[edited by - Trienco on January 30, 2003 12:21:24 PM]
ZeroMemory( Children, sizeof( QuadTree ) << 2 );
/* Bullmax */
-------------
Reality has many forms : good and evil, black and white, yin and yang.
/* Bullmax */
-------------
Reality has many forms : good and evil, black and white, yin and yang.
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