int main()       //想让数组逆置失败，为什么失败了，哪里出错了，求高手指点
{
    int buf[10] = { 99,89,54,67,1,21,5,76,90,32 };
    int low = 0;
    int high = 0;
    while (low < high)
    {
        int tmp = buf[low];
        buf[low] = buf[high];
        buf[high] = tmp;
        low++;
        high--;
    }
    for (int i = 0; i < 10; i++)
    {
        printf("%d\n", buf[i]);
    }
    getch(); return 0;
}

哦 不好意思  high的初始值应该是9 。。。头晕眼花的