using System.Text;

namespace opg1
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine($"AddAndMultiply: {AddAndMultiply(2, 4, 5)}");
            Console.WriteLine($"CToF(0): {CtoF(0)}");
            Console.WriteLine($"CToF(100): {CtoF(100)}");
            Console.WriteLine($"CToF(-300): {CtoF(-300)}");
            Console.WriteLine($"ElementaryOperations(3, 8): {string.Join(", ", ElementaryOperations(3, 8))}");
            Console.WriteLine($"IsResultTheSame(2+2, 2*2): {IsResultTheSame(2 + 2, 2 * 2)}");
            Console.WriteLine($"IsResultTheSame(9/3, 16-1): {IsResultTheSame(9 / 3, 16 - 1)}");
            Console.WriteLine($"ModuloOperations(8, 5, 2): {ModuloOperations(8, 5, 2)}");
            Console.WriteLine($"CubeOf(2): {CubeOf(2)}");
            Console.WriteLine($"CubeOf(-5.5): {CubeOf(-5.5)}");
            Console.WriteLine($"SwapTwoNumbers(87, 45): {SwapTwoNumbers(87, 45)}");
            Console.WriteLine($"SwapTwoNumbers(-13, 2): {SwapTwoNumbers(-13, 2)}");
        }

        static int AddAndMultiply(int a, int b, int c)
        {
            return (a + b) * c;
        }

        static string CtoF(int celcius)
        {
            if (celcius <= -271.15)
                return "Temperature below absolute zero!";

            double fahrenheit = (celcius * 1.8) + 32;

            return $"T = {fahrenheit}F";
        }

        static List<double> ElementaryOperations(double a, double b)
        {
            List<double> retval = [a + b, a - b, a * b];
            if (a > 0 && b > 0)
                retval.Add(a / b);

            return retval;
        }

        static bool IsResultTheSame(double a, double b)
        {
            return a == b;
        }

        static int ModuloOperations(int a, int b, int c)
        {
            return (a % b) / c;
        }

        static double CubeOf(double a)
        {
            return a * a * a;
        }

        static string SwapTwoNumbers(int a, int b)
        {
            var sb = new StringBuilder();

            sb.Append($"Before: a = {a}, b = {b}; ");

            (a, b) = (b, a);

            sb.Append($"After: a = {a}, b = {b}");

            return sb.ToString();
        }
    }
}