C语言实现数组逆置

#include <stdio.h>
#include <assert.h>
void swap(int *a ,int *b)
{
    int tmp = *a;
    *a = *b;
    *b = tmp;
}
void show(int arr[], int len)
{
    assert(arr);
    assert(len > );
    int i = ;
    for (; i < len; i++){
        printf("%d ", arr[i]);
    }
    printf("\n");
}

void reverse(int arr[], int len)
{
    assert(arr);
    assert(len > );
    int *p = arr;
    int *q = arr + len - ;
    while (p < q){
        swap(p, q);
        p++, q--;
    }
}

int main()
{
    int arr[] = {,,,,,,,};
    int len = sizeof(arr) / sizeof(arr[]);
    show(arr, len);
    reverse(arr, len);
    show(arr, len);
    return ;
}