using System;

public class Program
{
    static void Main(string[] args)
    {
        int x, y;

        Console.WriteLine("Введите первое число: ");
        x = int.Parse(Console.ReadLine());
        Console.WriteLine("Введите второе число: ");
        y = int.Parse(Console.ReadLine());

        int greater = Utils.Greater(x, y);

        Console.WriteLine("Большим из чисел {0} и {1} является {2} ", x, y, greater);

        Console.WriteLine("До swap: \t" + x + " " + y);
        Utils.Swap(ref x, ref y);
        Console.WriteLine("После swap: \t" + x + " " + y);

        int f;
        bool ok;

        Console.WriteLine("Number for factorial:");
        x = int.Parse(Console.ReadLine());

        ok = Utils.Factorial(x, out f);

        if (ok)
            Console.WriteLine("Factorial(" + x + ") = " + f);
        else
            Console.WriteLine("Cannot compute this factorial");

        Console.WriteLine("choose the type of the triangle. type 1 for equilateral else 2: ");
        int triangleType = int.Parse(Console.ReadLine());

        switch (triangleType)
        {

        
        case 1:
            Console.WriteLine("input side length: ");
            double a = double.Parse(Console.ReadLine());
            Console.WriteLine("area = {0}", Operation.TriangleArea(a));
            break;
        case 2:
            Console.WriteLine("input first side length: ");
            double sideA = double.Parse(Console.ReadLine());
            Console.WriteLine("input second side length: ");
            double sideB = double.Parse(Console.ReadLine());
            Console.WriteLine("input third side length: ");
            double sideC = double.Parse(Console.ReadLine());
            Console.WriteLine("area = {0}", Operation.TriangleArea(sideA, sideB, sideC));
            break;
        default:
            Console.WriteLine("invalid triangle type");
            break;
        }


        Console.WriteLine("input coefficient a: ");
        int coef_a = int.Parse(Console.ReadLine());
        Console.WriteLine("input coefficient b: ");
        int coef_b = int.Parse(Console.ReadLine());
        Console.WriteLine("input coefficient c: ");
        int coef_c = int.Parse(Console.ReadLine());

        double x1, x2;
        int res = Operation.SolveQuadratic(coef_a, coef_b, coef_c, out x1, out x2);

        if (res == 1)
        {
            Console.WriteLine("Корни уравнения с коэффициентами a = {0}, b = {1}, c = {2} равны x1 = {3}, x2 = {4}.", coef_a, coef_b, coef_c, x1, x2);
        }
        else if (res == 0)
        {
            Console.WriteLine("Корень уравнения с коэффициентами a = {0}, b = {1}, c = {2} равны один x1 = x2 = {0}", coef_a, coef_b, coef_c, x1);
        }
        else
        {
            Console.WriteLine("Корней уравнения с коэффициентами a = {0}, b = {1}, c = {2} нет.", coef_a, coef_b, coef_c);
        }

    }
}