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/* This testcase is part of GDB, the GNU debugger.
Copyright 2020 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <iostream>
#include <vector>
struct node {
int id;
node *left;
node *right;
bool visited;
};
node node_array[50];
unsigned int CUR_IDX = 0;
node *
make_node (int val)
{
node *new_node = &(node_array[CUR_IDX++]);
new_node->left = NULL;
new_node->right = NULL;
new_node->id = val;
new_node->visited = false;
return new_node;
}
void
tree_insert (node *root, int val)
{
if (val < root->id)
{
if (root->left)
tree_insert (root->left, val);
else
root->left = make_node(val);
}
else if (val > root->id)
{
if (root->right)
tree_insert (root->right, val);
else
root->right = make_node(val);
}
}
void
inorder (node *root)
{
std::vector<node *> todo;
todo.push_back (root);
while (!todo.empty())
{
node *curr = todo.back();
todo.pop_back(); /* break-here */
if (curr->visited)
std::cout << curr->id << " ";
else
{
curr->visited = true;
if (curr->right)
todo.push_back (curr->right);
todo.push_back (curr);
if (curr->left)
todo.push_back (curr->left);
}
}
}
int
main (int argc, char **argv)
{
node *root = make_node (35);
tree_insert (root, 28);
tree_insert (root, 20);
tree_insert (root, 60);
inorder (root);
return 0;
}
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