将C二叉树根值保存在变量中

Question

Im working on a C library for binary tree, and Im wondering how I could save the value of the root of the tree to be able to display it later in a function.

My tree struct:

struct Node {
    int value;
    struct Node *left;
    struct Node *right;
};

typedef struct Node TNode;
typedef struct Node *binary_tree;

The binary tree root is initialised with the 3 value like this:

caller:

tree = NewBinaryTree(3);

NewBinaryTree method:

binary_tree NewBinaryTree(int value_root) {
    binary_tree newRoot = malloc(sizeof(TNode));
    if (newRoot) {
        newRoot->value = value_root;
        newRoot->left = NULL;
        newRoot->right = NULL;
    }
    return newRoot;
}

Basically I would like to be able to do a function that just display the value_root function even after adding elements to the binary tree and be able to still display the value_root value.This might be very basic but im learning C and im not sure.

thank you

Answer 1

在调用方中： printf( "%d\\n", tree->value ) – user3386109