写一个函数，实现字符串的逆序

#include<stdio.h>
#include<string.h>
void reverse_string(char* str)
{
    //assert(arr);
    int len = strlen(str);
    char* left = str;
    char* right = str + len - 1;
    while (left < right)
    {
        char tmp =* left;
        *left = *right;
        *right = tmp;
        left++;
        right--;
    }
}
int  main()
{
    char arr[562] = { 0 };
    printf("变化前的：\n");
    scanf("%s", arr);
    reverse_string(arr);
    printf("变化后的：%s\n", arr);
    return 0;
}