# Unit Converter
# Sean Smith 08/19/2022
# sean@spacealien.xyz

# anonymous function to convert celcius to farenheit. returns float
c_to_f = fn c -> c * 9 / 5 + 32 end

# anonymous function to convert farenheit to celcius. returns float
f_to_c = fn f -> (f - 32) * 5 / 9 end

IO.puts("Convert Celcius -> Farenheit -OR- Farenheit -> Celcius")
IO.puts("1) C->F ")
IO.puts("2) F->C")

argv1 = IO.gets("Enter selection number: ") |> String.trim() |> String.to_integer()

argv2 = IO.gets("Enter temperature: ") |> String.trim() |> String.to_float()

case argv1 do
  1 -> IO.puts(c_to_f.(argv2))
  2 -> IO.puts(f_to_c.(argv2))
  true -> {:error, "bad input"}
end