reverse binary tree c

Reversing a Binary Tree in C

To reverse a binary tree in C, you can use a simple recursive approach. Here are the steps involved in reversing a binary tree:

  1. Define the Binary Tree Structure:

  2. First, you need to define the structure for the binary tree. This structure typically includes a data value and pointers to the left and right child nodes.

  3. Create a Function to Reverse the Binary Tree:

  4. Define a function to reverse the binary tree. This function will take the root of the tree as an argument and recursively swap the left and right child nodes of each node in the tree.

  5. Implement the Recursive Algorithm:

  6. Use a recursive algorithm to traverse the binary tree and swap the left and right child nodes at each step. This can be achieved by using a simple recursive function that swaps the left and right child nodes and then calls itself on the left and right subtrees.

  7. Base Case Handling:

  8. Ensure that the recursive function has a base case to handle the termination of the recursion. This base case is typically when the current node being processed is a leaf node (i.e., it has no children).

  9. Example Code:

  10. Here's an example of how the function to reverse a binary tree might look in C: ``` struct TreeNode { int val; struct TreeNode left; struct TreeNode right; };

struct TreeNode invertTree(struct TreeNode root) { if (root == NULL) { return NULL; } struct TreeNode* temp = root->left; root->left = invertTree(root->right); root->right = invertTree(temp); return root; } ```

  1. Testing the Reversed Tree:
  2. After implementing the function, you can test the reversed binary tree by traversing it in pre-order, in-order, or post-order to verify that the tree has indeed been reversed.

By following these steps and implementing the provided example code, you can successfully reverse a binary tree in C.

[[SOURCE 1]]