Ejemplo n.º 1
0
        static void Main(string[] args)
        {
            Console.WriteLine("ax^2 + bx + c = 0");

            Console.Write("Enter a: ");
            var    aString = Console.ReadLine();
            double a       = InputValidation.CheckValidity(aString);

            Console.Write("Enter b: ");
            var    bString = Console.ReadLine();
            double b       = InputValidation.CheckValidity(bString);

            Console.Write("Enter c: ");
            var    cString = Console.ReadLine();
            double c       = InputValidation.CheckValidity(cString);

            var discriminant = SquareEquationMath.Discriminant(a, b, c);

            Console.WriteLine($"Discriminant = {discriminant}");

            if (discriminant == 0)
            {
                var firstRoot = SquareEquationMath.FirstRoot(discriminant, a, b);

                Console.WriteLine("Equation has 1 root");
                Console.WriteLine($"x1 = {firstRoot:F2}");

                Console.WriteLine($"{a}x^2 + {b}x + {c} = {a}*(x - {firstRoot:F2})*(x - {firstRoot:F2})");
            }
            if (discriminant > 0)
            {
                var firstRoot  = SquareEquationMath.FirstRoot(discriminant, a, b);
                var secondRoot = SquareEquationMath.SecondRoot(discriminant, a, b);

                Console.WriteLine("Equation has 2 roots");
                Console.WriteLine($"x1 = {firstRoot:F2}");
                Console.WriteLine($"x2 = {secondRoot:F2}");

                Console.WriteLine($"{a}x^2 + {b}x + {c} = {a}*(x - {firstRoot:F2})*(x - {secondRoot:F2})");
            }
            if (discriminant < 0)
            {
                Console.WriteLine("Equation has no roots");
            }

            Console.ReadKey();
        }
Ejemplo n.º 2
0
        private void btnCalculate_Click(object sender, EventArgs e)
        {
            var stringA = txtA.Text;
            var stringB = txtB.Text;
            var stringC = txtC.Text;

            double a;

            if (double.TryParse(stringA, out a) == false)
            {
                MessageBox.Show("Supplied value 'a' is not a number, please try again");
            }

            double b;

            if (double.TryParse(stringB, out b) == false)
            {
                MessageBox.Show("Supplied value 'b' is not a number, please try again");
            }

            double c;

            if (double.TryParse(stringC, out c) == false)
            {
                MessageBox.Show("Supplied value 'c' is not a number, please try again");
            }

            var discriminant = SquareEquationMath.Discriminant(a, b, c);

            if (discriminant < 0)
            {
                MessageBox.Show("D < 0, equation has no roots!");
            }

            var firstRoot  = SquareEquationMath.FirstRoot(discriminant, a, b);
            var secondRoot = SquareEquationMath.SecondRoot(discriminant, a, b);

            lblDiscriminant.Text = discriminant.ToString();
            lblFirstRoot.Text    = firstRoot.ToString();
            lblSecondRoot.Text   = secondRoot.ToString();
            lblPolyFactor.Text   = $"{a}x² + {b}x + {c} = {a}*(x - {firstRoot:F2})*(x - {secondRoot:F2})";
        }