Floating Point Math Help!

[dexter]

Hello,

I've been checking out the demo version all day and would like to know if it's possible to use numbers to 4 decimal places e.g 1.2345

When I use the following;

Print 500+1.2345

I get 501.234 instead of 501.2345

Is there anyway to specify the number of decimal places used?

I hope somebody can help me with this' it's been puzzling me all day!

Thanks in advance

[kevin]

Displayed floats are truncated, floats also are automatically rounded.    The user can't control this.   You can roll your own display though.

PlayBASIC Code: [Select]

Print 500+1.2345

print DecPlaces(500+1.2345)
;I get 501.234 instead of 501.2345




sync
waitkey

Psub DecPlaces(V#)
   iv=V#
   t=(v#-iv)*10000
   s$=str$(iv)+"."+str$(t)
EndPsub s$

[dexter]

Brilliant!, Thanks alot Kevin for the quick response :D

I'll be purchasing PlayBasic as soon as I can find a free rs232 DLL to use with it.

Thanks again.

[empty]

as soon as I can find a free rs232 DLL to use with it.

You want to access the serial port?

[dexter]

You want to access the serial port?

yes...sort of...

A USB GPS Unit that uses a virtual COM port driver

any ideas?

[empty]

It is possible to access the serial ports via the Windows API. If time allows, I'll write an example some time this week. You'd need to test it though as I don't think I have a device that requires the serial ports. :)

[dexter]

Thanks empty, that would be great!  

Can PlayBasic access the Windows API?
If you could point me in the right direction with regards to which command(s) to use I might be able to muddle through.

I think the content of the Help file for PlayBasic is extreemly good the only thing lacking is some sort of search function (or has it got one?)

Thanks again.

[kevin]

You can access API functions using the DLL commands.

There's not search for help ATM.   One day :)

[empty]

If you could point me in the right direction with regards to which command(s) to use I might be able to muddle through.

The functions in question are all in the Kernel32.dll, if I remember correctly. You need
CreateFile
ConfigurePort
SetCommTimeouts
ReadFile
WriteFile
CloseFile

[dexter]

Thanks again, :D

time for a bit of googling