How to initialize the array using malloc in Binary Tree Inorder Traversal in C ?

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    • Definition for a binary tree node.
    • struct TreeNode {
    • int val;
    • struct TreeNode *left;
    • struct TreeNode *right;
    • };
    • Return an array of arrays of size *returnSize.
    • The sizes of the arrays are returned as *columnSizes array.
    • Note: Both returned array and columnSizes array must be malloced, assume caller calls free().
      levelOrder(struct TreeNode* root, int** columnSizes, int* returnSize) {

    What is the meaning of returnSize, columnSizes here?
    How do you initialize the array using malloc with the help of returnSize and ColumnSizes in C?
    Please provide your code snippet.

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