Ejemplo n.º 1
0
    private static void roots_to_r8poly_test()

    //****************************************************************************80
    //
    //  Purpose:
    //
    //    roots_to_typeMethods.r8poly_test tests roots_to_r8poly();
    //
    //  Licensing:
    //
    //    This code is distributed under the GNU LGPL license.
    //
    //  Modified:
    //
    //    18 January 2007
    //
    //  Author:
    //
    //    John Burkardt
    //
    {
        const int MAXROOT = 5;

        double[] c  = new double[MAXROOT + 1];
        int      nc = 0;

        double[] roots = new double[MAXROOT];

        Console.WriteLine("");
        Console.WriteLine("roots_to_typeMethods.r8poly_test");
        Console.WriteLine("  roots_to_r8poly() computes polynomial coefficients from roots.");
        Console.WriteLine("");

        int nroot = 1;

        roots[0] = 3.0;
        typeMethods.r8vec_print(nroot, roots, "  The roots:");

        Roots.roots_to_r8poly(nroot, roots, ref nc, ref c);

        typeMethods.r8poly_print(nc, c, "  The polynomial:");

        nroot    = 2;
        roots[0] = 3.0;
        roots[1] = 1.0;
        typeMethods.r8vec_print(nroot, roots, "  The roots:");

        Roots.roots_to_r8poly(nroot, roots, ref nc, ref c);

        typeMethods.r8poly_print(nc, c, "  The polynomial:");

        nroot    = 3;
        roots[0] = 3.0;
        roots[1] = 1.0;
        roots[2] = 2.0;
        typeMethods.r8vec_print(nroot, roots, "  The roots:");

        Roots.roots_to_r8poly(nroot, roots, ref nc, ref c);

        typeMethods.r8poly_print(nc, c, "  The polynomial:");

        nroot    = 4;
        roots[0] = 3.0;
        roots[1] = 1.0;
        roots[2] = 2.0;
        roots[3] = 4.0;
        typeMethods.r8vec_print(nroot, roots, "  The roots:");

        Roots.roots_to_r8poly(nroot, roots, ref nc, ref c);

        typeMethods.r8poly_print(nc, c, "  The polynomial:");
    }