从const char arr[]转换为char **

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

char** convert(const char arr[]) {
    int length = strlen(arr);
    char** result = (char**)malloc((length + 1) * sizeof(char*));
    
    for (int i = 0; i < length; i++) {
        result[i] = (char*)malloc(sizeof(char));
        result[i][0] = arr[i];
    }
    
    result[length] = (char*)malloc(sizeof(char));
    result[length][0] = '\0';
    
    return result;
}

int main() {
    const char arr[] = "Hello";
    char** converted = convert(arr);
    
    printf("Converted string: %s\n", *converted);
    
    // 释放内存
    for (int i = 0; converted[i] != NULL; i++) {
        free(converted[i]);
    }
    free(converted);
    
    return 0;
}