double max value?

[Nando Iavarone <f.iavarone(at)acsys.it>]

Hi.
what do you think?

IDL 5.1 on AIX 4.2

IDL> defsysv,'!PQF_D',1.7976931348623158D308,1
IDL> print,!PQF_D
  1.7976931e+308
% Program caused arithmetic error: Floating underflow
IDL> print,1.7976931348623158D308
  1.7976931e+308
% Program caused arithmetic error: Floating underflow
IDL> a=!PQF_D
IDL> print,a
  1.7976931e+308
% Program caused arithmetic error: Floating underflow

IDL 5.1 on IRIX-SGI 6.3

IDL> defsysv,'!PQF_D',1.7976931348623158D308,1
IDL> print,!PQF_D
  1.7976931e+308
IDL>  print,1.7976931348623158D308
  1.7976931e+308
IDL> a=!PQF_D
IDL> print,a
  1.7976931e+308
 

What is the configuration bit corresponding to double NaN?
How to print a double like 1d300 in extended format
(i.e. 10000000000..........0000000  (300 zero)) if the format don't accept more then
255 digits?

Than you.

-- 
Nando Iavarone
Advanced Computer System - SPACE DIVISION
via Lazzaro Belli, 23
00040  Frascati - RM
Tel: +39-6-944091 (switchboard)
          9440968 (direct)
E-mail: 
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    FrdndVrn@altavista.net