scan

//в четырехугольном классе
istream& operator>>(istream &in, quadrangle &q)
{
    point a;
    for (int i = 0; i < 4; i++)
    {
        in >> a.x >> a.y;
        q.table[i].x = a.x;
        q.table[i].y = a.y;
    }
    if (!in)
        throw "Error of reading!";
    return cin;
}
//майн
void scanF(FILE *f, node *first)
{
    ifstream in(f);
    node *tmp=first, *newtmp;
    while (!feof(f))
    {
        fflush(stdin);
        newtmp = new node;
        try
        {
            in >> newtmp->info;
        }
        catch (char *error)
        {
            cerr << error << endl;
        }
        if (in)
        {
            tmp->next = newtmp;
            newtmp->prev = tmp;
            newtmp->next = 0;
            tmp = tmp->next;
        }
        in.clear();
    }
}