Hi everybody,

i tried a simple calculation with several units of measure - so far it works but there are still two questions left i can't answer:

-> how can i use Math.Pow() or Math.Round() or something like that without getting

"error FS0193: Type constraint mismatch. The type
float<m/s>
is not compatible with type
float.
The unit of measure 'm/s' does not match the unit of measure '1'"

Is there another way than Math.Round(float(...),2)?

-> how can i show the used unit of measure of a variable like "ft" if the type is float<ft>? For example i want to show it als string in a MessageBox.

Here is a part of the code i wrote so far:

#light

open System
open System.Windows.Forms

[<Measure>] type kg
[<Measure>] type s
[<Measure>] type m

let g_Earth = 9.81<m/s^2>
let m_Apple = 0.2<kg>
let h_Apple = 4.0<m>

[<Measure>] type J = (kg*m^2)/s^2

///potential energy
let E_pot (m:float<kg>) (g:float<m/s^2>) (h:float<m>) : float<J> = m*g*h

let pot_Energy = E_pot m_Apple g_Earth h_Apple

let Result = MessageBox.Show ("potential energy: " + "\r\n" +
"\t" + Convert.ToString(Math.Round(float(pot_Energy),3)) + " ft")