Common list of operations to obtain the number of list node

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Gets the number of nodes list, is the most simple, you need to pay attention to whether the list is empty!

int GetListNodeLen(LIST_NODE * m_pHead)
{
    if (m_pHead == NULL)
    {
        return 0;
    }

    LIST_NODE * pTemp = m_pHead;
    int aListLen = 0;
    while(pTemp != NULL)    //判断当前节点指针是否为空
    {
        aListLen ++;
        pTemp = pTemp->next;
    }
    return aListLen;
}