Re: ANN: DX-Forth 4.57

On 25/12/2024 3:06 pm, John wrote:

...
Also, I seem to have some trouble with the floating point.
Keep getting f-stack error messages, which the manual says are under/over flows.
 
 
1 9 / <return>  returns a zero, not the expected 0.11111
 
So, I'm guessing the F* (etc.) are the floating point arithmetic.
3 5 F* <return>  however gives an "f-stack" error. 15 is an overflow?

Reals are entered with an 'e' thus:

3e 5e f* f. 15.  ok

The forth interpreter must be in DECIMAL for this to work.
 

And not sure how to enter decimals, I though maybe entering a ".0" after my numbers would flag them as reals not integers, but...
3.14  2.96  <return> does not put both numbers on the stack

Those would be illegal numbers - neither reals nor integers.  Integers
take the form:

Singles:  1 -2 3
Doubles:  1. -2. 3.

Doubles have their own operators  D+ D* D. etc.  There are also mixed operators
e.g. UM* that takes two unsigned singles and leaves an unsigned double.

 
Maybe I'm not doing it right, I'm just doing what's intuitive to me.
And yes, I'm running FORTH-F.  This is the DOS version.
Please help a wayward user....

Since Forth is rather different it has had to develop its own conventions.
A bit of practice and it will become second nature!

HTH