Re: Simple Pascal question

On 8/3/2024 1:32 PM, Scott Dorsey wrote:

In article <v8hn3m$3aviu$1@gwaiyur.mb-net.net>,
Uli Bellgardt  <UliBellgardtsSpamSink@online.de> wrote:

The value 1.5 should be an f_float value as well:
>
$ type zzz.pas
program z(input,output);
>
var
    x : f_float;

 This seems very strange to me... Pascal isn't supposed to have such
strong typing, is it?  I don't remember ever having to manually coerce
anything.  Or is f_float sufficiently different from a normal float?

The intended way in Pascal is to use real and double and
let compiler switch determine implementation.
/float=d_f -> F & D
/float=g_f -> F & G
/float=ieee -> S & T
But Pascal also allows for being more explicit.
To quote from the manual:
<quote>
VSI Pascal provides the following built-in data types to declare variables of a specific floating point type regardless of the /FLOAT setting on the command line (or FLOAT attribute on the MODULE):
     F_FLOAT
     D_FLOAT
     G_FLOAT
     S_FLOAT
     T_FLOAT
     X_FLOAT
</quote>
And I "forgot" to read a half page ahead and find:
<quote>
The floating lexical functions %F_FLOAT, %D_FLOAT, %G_FLOAT, %S_FLOAT, and %T_FLOAT can be prefixed on a floating constant to select the floating type regardless of any module-level attribute or command line selection.
</quote>
Arne