? "Expected fails:",INT(10^(_DECIMALS-_ERRORPOWER)/4*_CICLES)
Could you explain to me how you calculated(which theory) the expected fails, thank you.





>>Thanks Fabio I'll keep that in Mind, May be I need to switch from
>>ROUND(numb,2)
>>
>>To STR(numb1,19,2) = STR(numb2,19,2)
>
>This don't change the issue,
>STR uses round for compute the decimals part:
>

>#DEFINE 	_DECIMALS 		5
>#DEFINE		_ERRORPOWER		8
>#DEFINE		_CICLES			50000
>
>CLEAR
>? "Expected fails:",INT(10^(_DECIMALS-_ERRORPOWER)/4*_CICLES)
>t=0
>FOR K=1 TO _CICLES
>	X=RAND()*1000
>    E=(RAND()-0.5)*1E-_ERRORPOWER
>    IF ROUND(m.x,_DECIMALS) # ROUND(m.x+m.E,_DECIMALS)
>      t=t+1
>    ENDIF
>NEXT
>?? "     fails: ",T
>
>? "Expected fails:",INT(10^(_DECIMALS-_ERRORPOWER)/4*_CICLES)
>t=0
>FOR K=1 TO _CICLES
>	X=RAND()*1000
>    E=(RAND()-0.5)*1E-_ERRORPOWER
>    IF STR(m.x,18,_DECIMALS) # STR(m.x+m.E,18,_DECIMALS)
>      t=t+1
>    ENDIF
>NEXT
>?? "     fails: ",T
>

>
>Another point, 19 in STR() is useless,
>18 is sufficient ( 15,95 digits are used )
>
>STR cannot to be used with a unbound currency:
>

>x=$99999999999999.9900
>? x,STR(x,19,2)
>

>
>Fabio
>