是否有glibc附带的自动调整大小/动态数组实现？

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

int main() {
    int *arr;
    int n, i;

    printf("Enter the number of elements: ");
    scanf("%d", &n);

    arr = (int *)malloc(n * sizeof(int));

    printf("Enter %d integers:\n", n);
    for (i = 0; i < n; i++)
        scanf("%d", &arr[i]);

    // 增加数组大小
    n += 5;
    arr = (int *)realloc(arr, n * sizeof(int));

    printf("Enter %d more integers:\n", 5);
    for (i = n - 5; i < n; i++)
        scanf("%d", &arr[i]);

    printf("Updated array: ");
    for (i = 0; i < n; i++)
        printf("%d ", arr[i]);
    printf("\n");

    free(arr);

    return 0;
}