private void button_init_Click(object sender, EventArgs e)
        {
            enable = false;

            string s_q = textBox_q.Text;
            string s_b = textBox_b.Text;
            string s_a1 = textBox_a1.Text;
            string s_a2 = textBox_a2.Text;
            string s_T = textBox_T.Text;
            string s_x0 = textBox_x0.Text, s_x1 = textBox_x1.Text, s_x2 = textBox_x2.Text;

            if (!Processing.checkString(s_q, s_b, s_a1, s_a2, s_T, s_x0, s_x1, s_x2))
            {
                MessageBox.Show(" The fields are empty.");
            }

            else
            {
                try
                {
                    Processing.q = Int32.Parse(s_q);

                    Processing.a1          = double.Parse(s_a1);
                    Processing.a2          = double.Parse(s_a2);
                    Processing.b           = double.Parse(s_b);
                    Processing.T           = double.Parse(s_T);
                    Processing.x_0.M[0][0] = double.Parse(s_x0);
                    Processing.x_0.M[1][0] = double.Parse(s_x1);
                    Processing.x_0.M[2][0] = double.Parse(s_x2);



                    Program.k = (int)(30 / Processing.T);

                    if (!Processing.checkComponents(Processing.q, Processing.a1, Processing.a2, Processing.T))
                    {
                        MessageBox.Show(" Incorrect parametres. Please, try to input again.");
                    }
                    else
                    {
                        Processing.function();
                        if (!Processing.checkLimit)
                        {
                            MessageBox.Show(" Limit doesn't exist . Please, Enter correct T.");
                        }

                        enable = true;
                    }

                    button1.Enabled       = enable;
                    button_output.Enabled = enable;
                }
                catch (Exception ex)
                {
                    enable = false;
                    MessageBox.Show(ex.Message);
                    button1.Enabled       = enable;
                    button_output.Enabled = enable;
                }
            }
        }
        private void button_init_Click(object sender, EventArgs e)
        {
            enable       = false;
            buildControl = true;

            string s_q = textBox_q.Text;
            string s_b = textBox_b.Text;
            string s_a1 = textBox_a1.Text;
            string s_a2 = textBox_a2.Text;
            string s_T = textBox_T.Text;
            string s_x0 = textBox_x0.Text, s_x1 = textBox_x1.Text, s_x2 = textBox_x2.Text;
            string s_xx0 = textBox_xx0.Text, s_xx1 = textBox_xx1.Text, s_xx2 = textBox_xx2.Text;
            string s_k0 = textBox_k0.Text;


            if (!Processing.checkString(s_q, s_b, s_a1, s_a2, s_T, s_x0, s_x1, s_x2))
            {
                MessageBox.Show(" The fields are empty.");
            }

            else
            {
                try{
                    Processing.q = Int32.Parse(s_q);

                    Processing.a1          = double.Parse(s_a1);
                    Processing.a2          = double.Parse(s_a2);
                    Processing.b           = double.Parse(s_b);
                    Processing.T           = double.Parse(s_T);
                    Processing.x_0.M[0][0] = double.Parse(s_x0);
                    Processing.x_0.M[1][0] = double.Parse(s_x1);
                    Processing.x_0.M[2][0] = double.Parse(s_x2);

                    Processing.xx.M[0][0] = double.Parse(s_xx0);
                    Processing.xx.M[1][0] = double.Parse(s_xx1);
                    Processing.xx.M[2][0] = double.Parse(s_xx2);
                    Processing.k0         = Int32.Parse(s_k0);

                    if (Processing.k0 <= 0)
                    {
                        throw new WarningException(" Incorrect parametr k0");
                    }
                    if (!(Processing.checkComponents(Processing.q, Processing.a1, Processing.a2, Processing.T) && Processing.checkAccurancy(Processing.q)))
                    {
                        MessageBox.Show(" Incorrect parametres. Please, try to input again.");
                    }
                    else
                    {
                        Processing.function();
                        if (!Processing.checkLimit)
                        {
                            MessageBox.Show(" Limit doesn't exist . Please, Enter correct T.");
                        }
                        // else
                        enable = true;
                    }

                    button1.Enabled          = enable;
                    button_output.Enabled    = enable;
                    button_control.Enabled   = enable;
                    button_outMatrix.Enabled = enable;
                }
                catch (Exception ex)
                {
                    enable = false;
                    MessageBox.Show(ex.Message);
                    button1.Enabled          = enable;
                    button_output.Enabled    = enable;
                    button_control.Enabled   = enable;
                    button_outMatrix.Enabled = enable;
                }
            }
        }