How can I ensure that all double values generated by my windows application has the thousand comma seperator

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I just developed this window application.

I often have to display monetary values to users, and I noticed that users will not be able to tell at a glance the value of large double values,(unless there are separating gaps or comma separator that seperates multiple of thousand value like thousand , million billion etc).

Please is there a way I can make double vales to have the thousand or comma separator?

Posted 3-Oct-11 6:38am

Gbenbam

Updated 3-Oct-11 21:36pm

Dalek Dave

v2

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Manfred Rudolf Bihy 3-Oct-11 12:46pm

Which flavor of C++ are you talking about? MFC or CLI

Dalek Dave 4-Oct-11 3:37am

Edited for Readabilty.

5 solutions

Solution 3

I will never understand why you do not search for code first. Second line in Bing's search results yields working code sample:
Locale fun (formatting numbers)

Update: Much better solution (recommended): Get a moneypunct facet for cout for a locale

Posted 3-Oct-11 7:18am

Sergey Chepurin

Updated 21-Oct-11 23:45pm

v2

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Emilio Garavaglia 4-Oct-11 2:57am

That's exacly how the standar C++ shold deal with number representation: replace the num_put / num_get facet of the locale.

Solution 4

Here is a link to the IEEE 754-2008[^] page on wikipedia that you may find of interest. It explains what SAKryukov means by "binary".

Best regards
Espen Harlinn

Posted 3-Oct-11 9:39am

Espen Harlinn

Comments

Sergey Alexandrovich Kryukov 3-Oct-11 19:04pm

Thank you for explaining what I mean; my 5.
--SA

Espen Harlinn 3-Oct-11 19:06pm

Thanks, Sergey - I figured it might be useful :)

Solution 5

Hi,

If you are on Microsoft Windows you should consider using the GetNumberFormat Function[^] with the locale id of English_USA.1252

C++

TCHAR szFormatted[MAX_PATH] = {0};
LCID lc = MAKELCID(MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US),SORT_DEFAULT);
GetNumberFormat(lc,0,_T("1234567.890"),NULL,szFormatted,ARRAYSIZE(szFormatted));

Best Wishes,
-David Delaune

Posted 3-Oct-11 12:09pm

Randor

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-10-03T06:48:00

Solution 1

Double values has no separators or anything like that. All numeric values are "binary". You really need to understand what are you asking about.

Thousand or comma separators, numeric base of number presentation are, well, the features of presentation of numbers of different types as human-readable strings, no more no less. This is a matter of string formatting. In particular, see the function sprintf, http://www.cplusplus.com/reference/clibrary/cstdio/sprintf/[^].

—SA

Posted 3-Oct-11 6:48am

Sergey Alexandrovich Kryukov

Comments

Espen Harlinn 3-Oct-11 15:34pm

5'ed!

Sergey Alexandrovich Kryukov 3-Oct-11 18:12pm

Thank you, Espen.
--SA

Manfred Rudolf Bihy 3-Oct-11 15:43pm

Take a 5!

Sergey Alexandrovich Kryukov 3-Oct-11 18:12pm

Thank you, Manfred.
--SA

Manfred Rudolf Bihy · Accepted Answer · 2011-10-03T06:52:00

In case your flavor is CLI please look into this: http://msdn.microsoft.com/en-us/library/system.globalization.numberformatinfo(v=VS.80).aspx[^], this here: http://msdn.microsoft.com/en-us/library/system.globalization.numberformatinfo.numbergroupseparator(v=VS.80).aspx[^] and this also: http://msdn.microsoft.com/en-us/library/system.globalization.numberformatinfo.numberdecimalseparator(v=VS.80).aspx[^].

This page is also of interest: http://msdn.microsoft.com/en-US/library/0c899ak8(v=VS.80).aspx[^].

Cheers!

—MRB

How can I ensure that all double values generated by my windows application has the thousand comma seperator

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