将一个数组中的值按逆序重新存放（简易版）C语言实现

#include<stdio.h>
int main()
{
char arr[10] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
int i = 0;
int len = sizeof(arr) / sizeof(arr[0]);
int tmp = 0;
for (i = 0; i < (len/2); ++i)    //进行len/2次交换
{
tmp = arr[9 - i];
arr[9 - i] = arr[i];
arr[i] = tmp;
}
for (i = 0; i < len; ++i)
{
printf(" %d ", arr[i]);     //输出
}
return 0;
}