No rounding

[Robert E. Carneal]

Hello. I am having trouble with rounding. If after several
caluclations, Xval = .29859932, the value rounds to just .3.

I tried:
Xval = round(Xval,4)
So that I could obtain ".2986", but it wants to round to just .3.

Can I preserve Xval without any rounding for later use in the
program? Even it if were .298989898, I would prefer it show
.29899 at the worst. Not just .3.

Am I using ROUND wrong?

Thank you.

Robert

------------------

[Bob Zale]

No way of giving you an answer without much more information. Please post a small complete program to demonstrate your issue -- then someone can help you.

Best regards,

Bob Zale
PowerBASIC Inc.


------------------

[Arthur Gomide]

Robert,

Try this simple test - works fine with PB32/35

'Testing program between
' - intrinsic function ROUND  - double-precision argument / result
' - defined function MyRound# - double-precision argument / result
'    simple rounding function - no bankers rounding!

DEFINT A-Z

Xval#  = 0.29898989#
Xval2# = Xval#                    ' value preserved for later use

Xval# = ROUND(Xval#,5%)

PRINT fnMyRound#(0.29898989#,5%)  ' must print 0.29899 !!!
PRINT      ROUND(0.29898989#,5%)  ' must print 0.29899 !!!
PRINT Xval#			  ' must print 0.29899 !!!
PRINT Xval2#			  ' must print 0.29898989 !!!

END

' from my old Turbo Basic library
DEF fnMyRound#(Arg#, Dec%)
' esta função retorna o valor de arg# arredondado em dec%
 LOCAL Sinal%, Dec#, Temp#, Temp$
 LET Temp# = ABS(Arg#)
 IF Temp# >= 1d16 THEN
    fnMyRound# = Arg#
    EXIT DEF
 END IF
 LET Dec# = EXP10(Dec%)
 LET Sinal% = SGN(Arg#)
 LET Temp$ = STR$(Temp# * Dec# + .5#)
 LET Temp$ = LEFT$(Temp$, INSTR(Temp$, ".") - 1%) + "#"
 LET Temp$ = RIGHT$(Temp$, LEN(Temp$) - 1%)
 IF Sinal% < 0% THEN LET Temp$ = "-" + Temp$
 fnMyRound# = VAL(Temp$) / Dec#
END DEF 'Round#

edited in 11/21
- added Xval2#
- printout changed

------------------
Arthur Gomide
Como diria nosso profeta da bola, Dadá Maravilha:
"Para toda Problemática existe uma Solucionática!"



[This message has been edited by Arthur Gomide (edited November 21, 2006).]