pract10(1)

using System;
using System.IO;
namespace C
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                StreamReader f_r = new StreamReader("C:\\users\\read.txt");
            }
            catch
            {
                StreamWriter f_r = new StreamWriter("C:\\users\\read.txt");
                f_r.WriteLine("1,2\n20\n40\n2");
                f_r.Close();
            }
            StreamReader f = new StreamReader("C:\\users\\read.txt");
            double k = Convert.ToDouble(f.ReadLine());
            int xmin = Convert.ToInt32(f.ReadLine());
            int xmax = Convert.ToInt32(f.ReadLine());
            int dx = Convert.ToInt32(f.ReadLine());
            StreamWriter f_w = new StreamWriter("C:\\users\\write.txt", true);

            for(int i = xmin; i <= xmax; i+=dx)
                f_w.WriteLine("({0}):{1:0.00}", i, Math.Pow(1 / Math.Tan(k * i), 1 / 3) + Math.Cos(k * i) / Math.Log(Math.Sin(k * i)));
            f_w.Close();
        }
    }
}