DecimalSeparator: what changed
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Title: DecimalSeparator
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| 1 | + | > **Warning:** This variable is deprecated. Please see hints for information on replacement. | |
| 2 | + | ||
| 3 | + | **DecimalSeparator** is a [[Global variables|global char variable]] whose contents is determined by the used [[locale]]. It is used for representation of floating point numbers on screen and within functions like StrToFloat() and FloatToStr(). | |
| 4 | + | ||
| 5 | + | As long as every instance of a program uses the same decimal separator everything will behave as expected. However, if one instance of a program has its locale set to Dutch (nl_NL), writes a file containing some floating point numbers which is read by another instance of the same program with a locale set to US-English (en_US) you run into trouble because a formatted number like 123,456 will generate a conversion exception... | |
| 6 | + | ||
| 7 | + | A workaround can be to use a function like: | |
| 8 | + | ||
| 9 | + | ``` pascal | |
| 10 | + | function DecFloat2Str( const d: double ): string; | |
| 11 | + | var | |
| 12 | + | myseparator: char; | |
| 13 | + | begin | |
| 14 | + | myseparator := DecimalSeparator; | |
| 15 | + | DecimalSeparator := '.'; | |
| 16 | + | Result := FloatToStr( d ); | |
| 17 | + | DecimalSeparator := myseparator; | |
| 18 | + | end; | |
| 19 | + | ``` | |
| 20 | + | ||
| 21 | + | DecimalSeparator is defined in sysinth.inc as: | |
| 22 | + | ||
| 23 | + | ` DecimalSeparator : Char absolute DefaultFormatSettings.DecimalSeparator deprecated;` | |
| 24 | + | ||
| 25 | + | ## Important hint | |
| 26 | + | ||
| 27 | + | DecimalSeparator is deprecated. In all new projects, it should be replaced by the [[DefaultFormatSettings]] variable. | |
| 28 | + | ||
| 29 | + | ## See also | |
| 30 | + | ||
| 31 | + | - [[ThousandSeparator]] | |
| 32 | + | - [[ListSeparator]] | |
| 33 | + | - [Documentation on DecimalSeparator](http://www.freepascal.org/docs-html/rtl/sysutils/decimalseparator.html) | |
| 34 | + | ||
| 35 | + | --- | |
| 36 | + | *From the Free Pascal wiki, page "DecimalSeparator", as it stood on 2023-04-06 after a change by Jwdietrich, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).* |