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Numbers dot separated sum up bug?


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Guys I have  no idea what's wrong so I think it's a bug in autoit or I am lack of some knowledge.

Please take a look:

#include <Array.au3>
local $array[0]
_ArrayAdd($array, "54.83")
_ArrayAdd($array, "48.99")
_ArrayAdd($array, "25.58")
_ArrayAdd($array, "26.99")
_ArrayAdd($array, "43.99")
_ArrayAdd($array, "40")
_ArrayAdd($array, "29.94")
_ArrayAdd($array, "183.68")
_ArrayAdd($array, "20.99")
_ArrayAdd($array, "35.98")
_ArrayAdd($array, "26.99")
_ArrayAdd($array, "80.99")
_ArrayAdd($array, "35.89")
_ArrayAdd($array, "87")
_ArrayAdd($array, "60.99")
_ArrayAdd($array, "60.99")
_ArrayAdd($array, "29.39")
_ArrayAdd($array, "382")
_ArrayAdd($array, "47.98")
_ArrayAdd($array, "42.99")
_ArrayAdd($array, "40.99")
_ArrayAdd($array, "44.98")
_ArrayAdd($array, "86.99")
_ArrayAdd($array, "31.49")
_ArrayAdd($array, "169.99")
_ArrayAdd($array, "40.98")
_ArrayAdd($array, "37.88")
_ArrayAdd($array, "47.99")
_ArrayAdd($array, "35.89")
_ArrayAdd($array, "257.21")
_ArrayAdd($array, "29.39")
_ArrayAdd($array, "37.99")
_ArrayAdd($array, "83.99")
_ArrayAdd($array, "26.99")
_ArrayAdd($array, "40.99")
_ArrayAdd($array, "23.98")
_ArrayAdd($array, "117.4")
_ArrayAdd($array, "37.99")
_ArrayAdd($array, "525.4")
_ArrayAdd($array, "40.99")
_ArrayAdd($array, "26.99")
_ArrayAdd($array, "35.88")
_ArrayAdd($array, "29.99")
_ArrayAdd($array, "50.98")
_ArrayAdd($array, "53.66")
_ArrayAdd($array, "43.99")
_ArrayAdd($array, "54")
_ArrayAdd($array, "40.99")
_ArrayAdd($array, "26.99")
_ArrayAdd($array, "24.49")
_ArrayAdd($array, "49.49")
_ArrayAdd($array, "42.99")
_ArrayAdd($array, "46.99")
_ArrayAdd($array, "97")
_ArrayAdd($array, "21.48")
_ArrayAdd($array, "80")
_ArrayAdd($array, "69")
_ArrayAdd($array, "167.7")
_ArrayAdd($array, "103.93")
_ArrayAdd($array, "319.2")
_ArrayAdd($array, "112.96")
_ArrayAdd($array, "55.99")
_ArrayAdd($array, "32.89")
_ArrayAdd($array, "43.99")
_ArrayAdd($array, "83.99")
_ArrayAdd($array, "86.99")
_ArrayAdd($array, "32.89")
_ArrayAdd($array, "34.98")
_ArrayAdd($array, "40.99")
_ArrayAdd($array, "33")
_ArrayAdd($array, "35.49")
_ArrayAdd($array, "26.78")
_ArrayAdd($array, "150.7")
_ArrayAdd($array, "87")
;when you sum up this all number it should gives result 5370.6 but it gives 5370.05999999999

_ArrayDisplay($array)
$Result = "0.0"
for $i=0 to Ubound($array) - 1
    $Result += $array[$i]
Next
msgbox(0,0,$Result)

 

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maniootek,

No bug. Look up "floating point arithmetic" and you will see it is a result of how computers store doubles.

The solution? Convert to integers and then reconvert the result:

$Result = 0
For $i = 0 To UBound($array) - 1
    $Result += 100 * $array[$i]
Next
MsgBox(0, 0, $Result / 100)

M23

Public_Domain.png.2d871819fcb9957cf44f4514551a2935.png Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind

Open spoiler to see my UDFs:

Spoiler

ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area

 

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