public static void applyMethod(double eps)
{
List <double> coeffs = new List <double>()
{
-55, 119, 280, -634, -209, 514, 131, 3
};
List <double> coeffsA = decreaseCoeffs(coeffs);
List <double> coeffsB = new List <double>(new double[coeffs.Count]);
int n = coeffs.Count - 1, p = 0;
while (!stopCriterion(coeffsA, coeffsB, eps))
{
p++;
for (int k = 0; k <= n; k++)
{
double sum = 0;
for (int j = 1; j <= Math.Min(k, n - k); j++)
{
sum += Math.Pow(-1, j) * coeffsA[k - j] * coeffsA[k + j];
}
coeffsB[k] = Math.Pow(coeffsA[k], 2) + 2 * sum;
}
coeffsA = decreaseCoeffs(coeffsB);
}
List <double> roots = new List <double>(new double[coeffs.Count - 1]);
double root = 0;
for (int i = 1; i < coeffsA.Count; i++)
{
root = Math.Pow(coeffsA[i] / coeffsA[i - 1], Math.Pow(2, -p));
if (Math.Abs(Variant.polynom(root)) < Math.Abs(Variant.polynom(-root)))
{
roots[i - 1] = root;
}
else
{
roots[i - 1] = -root;
}
}
foreach (var r in roots)
{
Console.WriteLine("For: " + r + ".");
double a = r - 0.1;
double b = r + 0.1;
SimpleIterationMethod.applyMethod(Variant.polynom, a, b, eps);
Console.WriteLine("");
}
}
static void Main(string[] args)
{
int userInput;
Console.WriteLine("Choose what you want:\n" +
"0. Exit.\n" +
"1. First equation in Horde Method.\n" +
"2. Second equation in Steffensen Method.\n" +
"3. Second equation in Simple Iterations Method.\n" +
"4. Output the roots of the algebraic equation by the Lobachevsky method (clarifying - SIM)");
int.TryParse(Console.ReadLine(), out userInput);
Console.WriteLine("Enter epsilon or leave empty [ by default eps = 10^(-7) ]:");
string epsInput = Console.ReadLine();
double eps = string.IsNullOrEmpty(epsInput) ? Math.Pow(10, -7) : Convert.ToDouble(epsInput);
double a, b;
while (userInput != 0)
{
switch (userInput)
{
case 0:
Console.Clear();
Console.WriteLine("Have a nice day! :)");
Environment.Exit(0);
break;
case 1:
Console.Clear();
Console.WriteLine("Enter interval start:");
a = Convert.ToDouble(Console.ReadLine(), System.Globalization.CultureInfo.GetCultureInfo("en-US"));
Console.WriteLine("Enter interval end:");
b = Convert.ToDouble(Console.ReadLine(), System.Globalization.CultureInfo.GetCultureInfo("en-US"));
if (!Auxiliary.isInputForFuncValid(Variant.f1, a, b))
{
break;
}
HordeMethod.applyMethod(Variant.f1, eps, a, b);
break;
case 2:
Console.Clear();
Console.WriteLine("Enter interval start:");
a = Convert.ToDouble(Console.ReadLine(), System.Globalization.CultureInfo.GetCultureInfo("en-US"));
Console.WriteLine("Enter interval end:");
b = Convert.ToDouble(Console.ReadLine(), System.Globalization.CultureInfo.GetCultureInfo("en-US"));
if (!Auxiliary.isInputForFuncValid(Variant.f2, a, b))
{
break;
}
NewtonMethod.applyMethod(Variant.f2, a, b, eps);
break;
case 3:
Console.Clear();
Console.WriteLine("Enter interval start:");
a = Convert.ToDouble(Console.ReadLine(), System.Globalization.CultureInfo.GetCultureInfo("en-US"));
Console.WriteLine("Enter interval end:");
b = Convert.ToDouble(Console.ReadLine(), System.Globalization.CultureInfo.GetCultureInfo("en-US"));
if (!Auxiliary.isInputForFuncValid(Variant.f2, a, b))
{
break;
}
SimpleIterationMethod.applyMethod(Variant.f2, a, b, eps);
break;
case 4:
Console.Clear();
LobachevskyMethod.applyMethod(eps);
break;
default:
Console.Clear();
Console.WriteLine("Enter correct number of action!");
int.TryParse(Console.ReadLine(), out userInput);
break;
}
Console.WriteLine("\n---------------------------------------------------->>>>>\n" +
"Choose what you want:\n" +
"0. Exit.\n" +
"1. First equation in Horde Method.\n" +
"2. Second equation in Steffensen's Method.\n" +
"3. Second equation in Simple Iterations Method.\n" +
"4. Output the roots of the algebraic equation by the Lobachevsky method.");
int.TryParse(Console.ReadLine(), out userInput);
}
}
