C中保存字符串的Arraylist

typedef struct {
    char** data;  // 指向字符串的指针数组
    int size;     // Arraylist的大小
} ArrayList;

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

typedef struct {
    char** data;
    int size;
} ArrayList;

ArrayList* createArrayList() {
    ArrayList* list = (ArrayList*)malloc(sizeof(ArrayList));
    list->data = NULL;
    list->size = 0;
    return list;
}

void addElement(ArrayList* list, const char* element) {
    list->size++;
    list->data = (char**)realloc(list->data, sizeof(char*) * list->size);
    list->data[list->size - 1] = (char*)malloc(strlen(element) + 1);
    strcpy(list->data[list->size - 1], element);
}

void removeElement(ArrayList* list, int index) {
    if (index < 0 || index >= list->size) {
        printf("Invalid index\n");
        return;
    }

    free(list->data[index]);
    for (int i = index; i < list->size - 1; i++) {
        list->data[i] = list->data[i + 1];
    }
    list->size--;
    list->data = (char**)realloc(list->data, sizeof(char*) * list->size);
}

const char* getElement(ArrayList* list, int index) {
    if (index < 0 || index >= list->size) {
        printf("Invalid index\n");
        return NULL;
    }

    return list->data[index];
}

void destroyArrayList(ArrayList* list) {
    for (int i = 0; i < list->size; i++) {
        free(list->data[i]);
    }
    free(list->data);
    free(list);
}

int main() {
    ArrayList* list = createArrayList();

    addElement(list, "Hello");
    addElement(list, "World");
    addElement(list, "Cloud");

    printf("Elements in the ArrayList:\n");
    for (int i = 0; i < list->size; i++) {
        printf("%s\n", getElement(list, i));
    }

    removeElement(list, 1);

    printf("Elements in the ArrayList after removal:\n");
    for (int i = 0; i < list->size; i++) {
        printf("%s\n", getElement(list, i));
    }

    destroyArrayList(list);

    return 0;
}