using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("-------------------------------------------------------------------------");

        Console.WriteLine(":輸入電壓(Voltage)、電流(Current)、電組R(Resistance)和頻率(Frequency)     :");

        Console.WriteLine(":計算阻抗Z(Impedance)和電感值L(Inductance)                               :");

        Console.WriteLine(":輸出電壓(voltage)、電流(current)、電感抗(Reactance)和電感值L(Inductance) :");

        Console.WriteLine("-------------------------------------------------------------------------");

        Console.WriteLine("-------------------------------------------");

        Console.WriteLine("Input Voltage,Current,Resistance,Frequency");

        Console.WriteLine("-------------------------------------------");

        Console.Write("Input Voltage=");

        String Voltage = Console.ReadLine();

        Console.Write("Input Current=");

        String Current = Console.ReadLine();

        Console.Write("InpuAt Resistance=");

        String Resistance = Console.ReadLine();

        Console.Write("Input Frequency=");

        String Frequency = Console.ReadLine();

        Console.WriteLine("-------------------------------------------");

        Console.WriteLine("Output Voltage,Current,Reactance,Inductance");

        Console.WriteLine("-------------------------------------------");

        Console.WriteLine("V=" + Voltage + " V");

        Console.WriteLine("I=" + Current + " A");

        double Z = Convert.ToInt16(Voltage) / Convert.ToInt16(Current);

        double R = Convert.ToInt16(Resistance);

        double XL = Math.Pow(((Z * Z) - (R * R)),0.5);

        Console.WriteLine("XL=" + XL.ToString("#0.00") + " ohm");

        int f = 47;

        double L = XL / (2.0 * Math.PI * f);

        Console.WriteLine("L=" + L.ToString("#0.00") + " H");

    }

}