Wrong Asignment

[Cedric <Cedric.Lannock@gmx.net>]

Hi All,

I am learning Ada since a few days. In my book is a simple excercise to write a program. It looks like this:

with Text_IO;
with My_Int_IO;
with My_Flt_IO;
----------------------------------------------------------------------
procedure chapter2_programming_projects_1 is
   Celsius    : float := 0.0;
   Fahrenheit : float := 0.0;

begin
   -- Input
   Text_IO.Put("Please put in the temperature in Fahrenheit: ");
   My_Flt_IO.Get(Item => Fahrenheit);
   
   -- Processing
   Celsius := (5/9) x (Fahrenheit - 32);
   
   -- Output
   Text_IO.Put(Item => "The temperature in Celsius is ");
   My_Flt_IO.Put(Item => Celsius, Fore => 10, After => 2);
   
end chapter2_programming_projects_1;

The compiler says:

Celsius := (5/9) x (Fahrenheit - 32); -- binary operator expected

Why does this statement result in an binary object?

Kind regards

Cedric