Delete All X

void delAllX(list &l, int x)
{
    for (node *cur = l.pHead; cur->pNext != NULL;)
    {
        node *pBuffer;
        while (l.pHead != NULL && l.pHead->data == x)
        {
            pBuffer = l.pHead;
            l.pHead = l.pHead->pNext;
            cur = l.pHead;
            delete pBuffer;
            if (l.pHead == NULL)
            {
                l.pTail = NULL;
                return;
            }
        }

        if (cur->pNext->data == x)
        {
            if (cur->pNext == l.pTail)
                l.pTail = cur;
            pBuffer = cur->pNext;
            cur->pNext = cur->pNext->pNext;
            delete pBuffer;
        }
        else
        {
            cur = cur->pNext;
        }

    }
}