C语言中动态增长的字符串数组

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct Node {
    char *data;
    struct Node *next;
} Node;

Node *createNode(const char *str) {
    Node *newNode = (Node *)malloc(sizeof(Node));
    newNode->data = strdup(str);
    newNode->next = NULL;
    return newNode;
}

void appendNode(Node **head, const char *str) {
    if (*head == NULL) {
        *head = createNode(str);
    } else {
        Node *current = *head;
        while (current->next != NULL) {
            current = current->next;
        }
        current->next = createNode(str);
    }
}

void printList(Node *head) {
    Node *current = head;
    while (current != NULL) {
        printf("%s\n", current->data);
        current = current->next;
    }
}

void freeList(Node *head) {
    Node *current = head;
    while (current != NULL) {
        Node *temp = current;
        current = current->next;
        free(temp->data);
        free(temp);
    }
}

int main() {
    Node *head = NULL;
    appendNode(&head, "Hello");
    appendNode(&head, "World");
    appendNode(&head, "C");
    appendNode(&head, "Language");

    printList(head);

    freeList(head);
    return 0;
}