mirror of
https://github.com/Zeal-Operating-System/ZealOS.git
synced 2025-03-14 20:15:05 +00:00
132 lines
2.3 KiB
HolyC
Executable file
132 lines
2.3 KiB
HolyC
Executable file
#define N 32
|
|
|
|
class Node
|
|
{
|
|
Node *left, *right;
|
|
I64 n;
|
|
};
|
|
|
|
I64 n1, n2, common_ancestor;
|
|
Node *root;
|
|
|
|
#define X_SPACING 16
|
|
#define Y_SPACING 45
|
|
#define ARROW_SPACING 3
|
|
|
|
U0 ShowTree(CDC *dc, Node *tmpn, I64 *_node_x, I64 *_tree_x, I64 y)
|
|
{
|
|
I64 node_x;
|
|
|
|
if (tmpn)
|
|
{
|
|
if (tmpn->left)
|
|
{
|
|
ShowTree(dc, tmpn->left, &node_x, _tree_x, y + Y_SPACING);
|
|
dc->color = BLUE;
|
|
GrArrow3(dc, *_tree_x, y, 0, node_x + ARROW_SPACING, y + Y_SPACING - ARROW_SPACING, 0);
|
|
}
|
|
if (tmpn->n == n1 || tmpn->n == n2)
|
|
{
|
|
if (tmpn->n == common_ancestor)
|
|
dc->color = YELLOW;
|
|
else
|
|
dc->color = RED;
|
|
}
|
|
else if (tmpn->n == common_ancestor)
|
|
dc->color = GREEN;
|
|
else
|
|
dc->color = BLUE;
|
|
|
|
*_node_x = *_tree_x;
|
|
GrPrint(dc, *_node_x, y, "%d", tmpn->n);
|
|
*_tree_x += X_SPACING;
|
|
|
|
if (tmpn->right)
|
|
{
|
|
ShowTree(dc, tmpn->right, &node_x, _tree_x, y + Y_SPACING);
|
|
dc->color = BLUE;
|
|
GrArrow3(dc, *_node_x, y, 0, node_x - ARROW_SPACING, y + Y_SPACING - ARROW_SPACING, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
U0 DrawIt(CTask *, CDC *dc)
|
|
{
|
|
I64 node_x = 0, tree_x = 0;
|
|
|
|
ShowTree(dc, root, &node_x, &tree_x, 20);
|
|
}
|
|
|
|
U0 TreeAdd(Node **_root, Node *tmpn)
|
|
{
|
|
Node *root = *_root;
|
|
|
|
if (!root)
|
|
*_root = tmpn;
|
|
else if (tmpn->n == root->n)
|
|
Free(tmpn);
|
|
else if (tmpn->n < root->n)
|
|
TreeAdd(&root->left, tmpn);
|
|
else
|
|
TreeAdd(&root->right, tmpn);
|
|
}
|
|
|
|
U0 TreeNew()
|
|
{
|
|
I64 i;
|
|
Node *tmpn;
|
|
|
|
for (i = 0; i < N; i++)
|
|
{
|
|
tmpn = CAlloc(sizeof(Node));
|
|
tmpn->n = RandU16 % N;
|
|
|
|
if (i == N - 1)
|
|
n1 = tmpn->n;
|
|
else if (i == N - 2)
|
|
n2 = tmpn->n;
|
|
|
|
TreeAdd(&root, tmpn);
|
|
Sleep(50);
|
|
}
|
|
}
|
|
|
|
U0 TreeCommonAncestorFind(Node *root)
|
|
{
|
|
if (root && root->n != n1 && root->n != n2)
|
|
{
|
|
common_ancestor = root->n;
|
|
if (n1 < root->n && n2 < root->n)
|
|
TreeCommonAncestorFind(root->left);
|
|
else if (n1 > root->n && n2 > root->n)
|
|
TreeCommonAncestorFind(root->right);
|
|
}
|
|
}
|
|
|
|
U0 TreeCommonAncestor()
|
|
{//Make tree and find common ancestor to n1 & n2.
|
|
root = NULL;
|
|
n1 = n2 = common_ancestor = 0;
|
|
|
|
SettingsPush; //See $LK,"SettingsPush",A="MN:SettingsPush"$
|
|
Fs->draw_it = &DrawIt;
|
|
DocClear;
|
|
"Scroll with {CTRL-Left Grab}.\n";
|
|
try
|
|
{
|
|
TreeNew;
|
|
TreeCommonAncestorFind(root);
|
|
PressAKey;
|
|
}
|
|
catch
|
|
PutExcept;
|
|
SettingsPop;
|
|
}
|
|
|
|
TreeCommonAncestor;
|
|
/*
|
|
Be careful with recursive routines in ZealOS
|
|
because the stack does not grow and will overflow.
|
|
|
|
See $LK,"::/Demo/StackGrow.ZC"$.
|
|
*/
|