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#include <iostream>
#include <string>
const int MAX_NODES = 10; // Maximum number of nodes in the tree
class TreeNode {
public:
std::string name;
TreeNode* _parent;
TreeNode* children[MAX_NODES]; // Array to store children
int childCount;
TreeNode(const std::string& nodeName) : name(nodeName), _parent(nullptr), childCount(0) {
for (int i = 0; i < MAX_NODES; i++) {
children[i] = nullptr;
}
}
void addChild(TreeNode* child) {
if (childCount < MAX_NODES) {
children[childCount++] = child;
child->_parent = this;
}
}
};
class GeneralTree {
public:
TreeNode* nodes[MAX_NODES];
int nodeCount;
GeneralTree() : nodeCount(0) {
for (int i = 0; i < MAX_NODES; i++) {
nodes[i] = nullptr;
}
}
TreeNode* findNode(const std::string& name) {
for (int i = 0; i < nodeCount; i++) {
if (nodes[i]->name == name) {
return nodes[i];
}
}
return nullptr;
}
void addNode(const std::string& name, const std::string& parentName) {
if (nodeCount >= MAX_NODES) {
std::cerr << "Maximum number of nodes reached!" << std::endl;
return;
}
TreeNode* node = new TreeNode(name);
nodes[nodeCount++] = node;
if (parentName != "null") {
TreeNode* parent = findNode(parentName);
if (parent != nullptr) {
parent->addChild(node);
} else {
std::cerr << "Parent node " << parentName << " not found!" << std::endl;
}
}
}
void printTree() {
// Find root (node with no parent)
TreeNode* root = nullptr;
for (int i = 0; i < nodeCount; i++) {
if (nodes[i]->_parent == nullptr) {
root = nodes[i];
break;
}
}
if (root) {
printSubtree(root, 0);
} else {
std::cout << "No root found (tree might be empty or cyclic)" << std::endl;
}
}
void printSubtree(TreeNode* node, int depth) {
for (int i = 0; i < depth; i++) {
std::cout << " ";
}
std::cout << node->name << std::endl;
for (int i = 0; i < node->childCount; i++) {
printSubtree(node->children[i], depth + 1);
}
}
~GeneralTree() {
for (int i = 0; i < nodeCount; i++) {
delete nodes[i];
}
}
};
int main() {
GeneralTree tree;
// Build the tree as described
tree.addNode("E", "null"); // E is root
tree.addNode("D", "E");
tree.addNode("C", "D");
tree.addNode("B", "D");
tree.addNode("A", "D");
// Print the tree structure
tree.printTree();
return 0;
}
#include <iostream>
#include <string>
const int MAX_NODES = 10;
class Tree {
private:
struct Node {
std::string name;
Node* _parent;
Node* children[MAX_NODES];
int childCount;
Node(const std::string& nodeName) : name(nodeName), _parent(nullptr), childCount(0) {
for (int i = 0; i < MAX_NODES; i++) {
children[i] = nullptr;
}
}
void addChild(Node* child) {
if (childCount < MAX_NODES) {
children[childCount++] = child;
child->_parent = this;
}
}
};
Node *_root;
public:
int nodeCount;
Node* nodes[MAX_NODES];
Tree() : nodeCount(0) {
for (int i = 0; i < MAX_NODES; i++) {
nodes[i] = nullptr;
}
}
Node* findNode(const std::string& name) {
for (int i = 0; i < nodeCount; i++) {
if (nodes[i]->name == name) {
return nodes[i];
}
}
return nullptr;
}
void addNode(const std::string& name, const std::string& parentName) {
if (nodeCount >= MAX_NODES) {
std::cerr << "Maximum number of nodes reached!" << std::endl;
return;
}
Node* node = new Node(name);
nodes[nodeCount++] = node;
if (parentName != "ROOT") {
Node* parent = findNode(parentName);
if (parent != nullptr) {
parent->addChild(node);
} else {
std::cerr << "Parent node " << parentName << " not found!" << std::endl;
}
}
}
void printTree() {
// Find root (node with no parent)
Node* root = nullptr;
for (int i = 0; i < nodeCount; i++) {
if (nodes[i]->_parent == nullptr) {
root = nodes[i];
break;
}
}
if (root) {
printSubtree(root, 0);
} else {
std::cout << "No root found (tree might be empty or cyclic)" << std::endl;
}
}
void printSubtree(Node* node, int depth) {
for (int i = 0; i < depth; i++) {
std::cout << " ";
}
std::cout << node->name << std::endl;
for (int i = 0; i < node->childCount; i++) {
printSubtree(node->children[i], depth + 1);
}
}
~Tree() {
for (int i = 0; i < nodeCount; i++) {
delete nodes[i];
}
}
};
int main() {
Tree tree;
// Build the tree as described
tree.addNode("E", "ROOT"); // E is root
tree.addNode("D", "E");
tree.addNode("C", "D");
tree.addNode("B", "D");
tree.addNode("A", "D");
// Print the tree structure
tree.printTree();
return 0;
}
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