Can you use Enum for Double variables?

Can you use Enum for Double variables?

I have created a class for handling Unit Conversion in C#. It is not working as it should only returning strings.

Here is the class:

using System;  using System.Collections.Generic;  using System.Linq;  using System.Text;  using System.IO;    namespace RestaurantManagementSystem  {      class unitHandler      {          public enum Units          {              Grams = 1,              KiloGrams = 0.001,              Milligram = 1000,              Pounds = 0.00220462,              Ounces = 0.035274,              Tonnes = 0.000001,                Litres = 1,              Millilitres = 1000,              Cups = 4.22675,              FluidOunces = 33.814,              TeaSpoon = 202.884,              TableSpoon = 67.628,              CubicFeet = 0.0353147,              CubicInch = 61.0237,              CubicCentimetres = 0.0001,              CubicMetres = 0.001            }            public double Convert_Value(Units from, Units to, double quantity)          {              double converted_quantity = 0;                double fromValue = quantity * Convert.ToDouble(from.ToString());                converted_quantity = fromValue * Convert.ToDouble(to.ToString());                return converted_quantity;          }      }  }  

I would somehow want the enum type to contain the double values of conversion factors of each unit then use them for conversion and returning the converted quantity.

Answer by John Gathogo for Can you use Enum for Double variables?

You cant use enum with doubles. You can only use it with int and long

Answer by Carson Myers for Can you use Enum for Double variables?

Nope:

I tried giving this to Visual Studio:

public enum Test : double  {      Hello, World  }  

And it said:

Type byte, sbyte, short, ushort, int, uint, long, or ulong expected

Answer by Adil for Can you use Enum for Double variables?

No, The default type for enum is int or long and you could not use fractional numbers with it. You can use a struct or class intead of enum for double

public struct Units  {          public const double Grams = 1;          public const double KiloGrams = 0.001;          public const double Milligram = 1000;          public const double Pounds = 0.00220462;          public const double Ounces = 0.035274;          public const double Tonnes = 0.000001;          // Add Remaining units / values  }  

And use it like

double d = Units.KiloGrams;  

Answer by Habib for Can you use Enum for Double variables?

You can't use float/double with enums. You may have to define constants.

public const double KiloGrams = 0.001;  

Answer by Dmitry S. for Can you use Enum for Double variables?

You can convert a double to a long using the BitConverter.DoubleToInt64Bits(double) method before hand and hardcode them into an enum with the backing long type. Then you would have to convert the enum value back to a double.

It is probably more trouble than it is worth.

Answer by Zaheer Ahmed for Can you use Enum for Double variables?

Sorry, can't be done. Enums are strictly integers/bytes. Really, they are supposed to be their own type.

You can try:

enum Units() {      Grams ,      KiloGrams ,      Milligram   }    public function GetUnitsFloatValue(Units unit) : float  {      switch (unit)      {          case Units.Grams :              return 1;          case Units.KiloGrams :              return 0.001;          case Units.MilliGrams:              return 1000;                 }        //unhandled unit?      return 0;  }  

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