反转链表（C语言）

/*
 * 链表格式
 */
typedef struct List{
    int i_Value;
    struct List *p_Next;
}T_List, *PT_List;

/* 链表头 */
PT_List g_ptListHead;


/*
 * 功能  ：反转链表，并返回反转后的头结点 
 * 输入  ：链表头
 * 返回值：反转后的链表头
 */
PT_List ReverseList(PT_List ptListHead)
{
    PT_List ReverseListHead = NULL;
    PT_List ptPer  = NULL;
    PT_List ptCur  = ptListHead;
    PT_List ptNext = NULL;

    while (ptCur != NULL)
        {
            ptNext = ptCur->p_Next;
            if (ptNext == NULL)
                ReverseListHead = ptNext;
            ptCur->p_Next = ptPer;
            ptPer  = ptCur;
            ptCur  = ptNext;
        }
    return ReverseListHead;
}