diff --git a/tree-traversals-CPP b/tree-traversals-CPP new file mode 100644 index 0000000..363a3de --- /dev/null +++ b/tree-traversals-CPP @@ -0,0 +1,84 @@ +#include +using namespace std; + +/* structure of binary tree node which has data, pointer to left child +and a pointer to right child */ +struct Node +{ + int data; + struct Node* left, *right; + Node(int data) + { + this->data = data; + left = right = NULL; + } +}; + +/* "bottom-up" postorder traversal. */ +void printPostorder(struct Node* node) +{ + if (node == NULL) + return; + + // left subtree + printPostorder(node->left); + + // right subtree + printPostorder(node->right); + + // node + cout << node->data << " "; +} + +/* Print binary tree nodes in inorder*/ +void printInorder(struct Node* node) +{ + if (node == NULL) + return; + + /* left child */ + printInorder(node->left); + + /* print the data of node */ + cout << node->data << " "; + + /* right child */ + printInorder(node->right); +} + +/* print its nodes in preorder*/ +void printPreorder(struct Node* node) +{ + if (node == NULL) + return; + + /* data of node */ + cout << node->data << " "; + + /* left sutree */ + printPreorder(node->left); + + /* right subtree */ + printPreorder(node->right); +} + +/* Mainfunction test above functions*/ +int main() +{ + struct Node *root = new Node(1); + root->left = new Node(2); + root->right = new Node(3); + root->left->left = new Node(4); + root->left->right = new Node(5); + + cout << "\nPreorder traversal of binary tree is \n"; + printPreorder(root); + + cout << "\nInorder traversal of binary tree is \n"; + printInorder(root); + + cout << "\nPostorder traversal of binary tree is \n"; + printPostorder(root); + + return 0; +} \ No newline at end of file