void reverse(char *head)
    {
        char *start = head, *end = head;
        while(1)
        {
            if(*end == '\0')
            {
                end--;
                break;
            }
            end++;
            cout << *end << endl;
        }

        while(start != end)
        {
            char cTemp = *start;
            *start = *end;
            *end = cTemp;
            start++;
            end--;
        }
        cout << head << endl;
    }