Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Random Number
Message
 
 
À
26/11/2001 11:26:18
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Titre:
Divers
Thread ID:
00585489
Message ID:
00585794
Vues:
25
>>>>Hi all:
>>>>
>>>>How do I get a random number between 1 and 1000 in VFP6
>>>>I could not find it in help.
>>>>
>>>>Thank you.
>>>
>>>
? INT(1000 * RAND( ) + 1)
>>Instead of using 1000 in the equation above, use 999. The +1 could give you 1001, if RAND() returns 1 which it could.
>
>I was going to suggest that, but I did a small test
>
>
>do while .T.
> if ( int( 1000 * rand() + 1 ) > 1000 )
>   ? "Error"
>  endif
>enddo
>
>
>I let it run for 1/2 hour without getting "Error" printed. It is just a possibility that 1001 could be generated, but very unlikely.
>
>could try
>
>? round( 999 * rand() + 1, 0 )
>
I have a scheduler type program that was running on multiple PC's for years under FPD 2.6a w/o any errors. After PC's were upgraded the program would generate an error from time to time on one PC only. Further investigation showed that it was a result of RAND() function returning value 1.0. The bottom line, RAND() function can return value 1.0 :)
--sb--
Précédent
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform