int main()
{
    int a, b, c, D, x, y;

    cout << "Zadejte parametry a, b, c kvadraticke rovnice" << endl;
    cin >> a;
    cin >> b;
    cin >> c;

    D = sqrt((b * b) - 4 * a * c);

    if (D < 0)
    {
        cout << "Zadana kvadraticka rovnice nema v mnozine realnych cisel reseni" << endl;
    }

    if (D == 0)
    {
        x = -b / (2 * a);
        cout << "Kvadraticka rovnice ma pouze jeden koren: x = " << x << endl;
    }

    if (D > 0)
    {
        x = (-b + D) / (2 * a);
        y = (-b - D) / (2 * a);
        cout << "Koreny kvadraticke rovnice jsou: x1 = " << x << " a x2 = " << y << endl;
    }

    getchar();
    getchar();
    return 0;
}