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Number in cell and formatting 8 years 4 months ago #8955

  • carmelo peri
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Hello,
I have a problem with pl FPSpreadsheet on codetyphon 5.6 - win32.
If I insert a number in a cell, the number is automatically changed.
For example, entering 1.4 this is transformed into 1.399999999999999.
How can i solve?
thank you

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Number in cell and formatting 8 years 4 months ago #8956

  • Sternas Stefanos
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Sir
my suggestion is to test and LAB CT 5.70 revision 005631 info
has many changes
-Update pl_FPSpreadsheet to Ver 5.7.2 Source 16-01-2016 SVN Rev 4423
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Last edit: by Sternas Stefanos.

Number in cell and formatting 8 years 4 months ago #8957

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thanks for the reply . I'm taking care to download the version 5.7 and will test soon

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Number in cell and formatting 8 years 4 months ago #8958

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I installed the CT version 5.7 but nothing has changed . Some help ?
Tanks!

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Number in cell and formatting 8 years 4 months ago #8959

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Sir, can you make a test project with the problem ?
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Number in cell and formatting 8 years 4 months ago #8972

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Thank you Sir, for your interest.
The example in directory "codeocean/fpspreadsheet/sample/fpschart" generates the error described above. it is necessary to specify that this error was not present with version CT 5.2.

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Number in cell and formatting 8 years 4 months ago #8973

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I attach a picture to explain the problem.
Attachments:

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Number in cell and formatting 8 years 4 months ago #8974

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Sir
I think all are OK
or
I can't see the problem
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Number in cell and formatting 8 years 4 months ago #8975

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Sir,
You did not find the problem in example or believes that the operation is correct ?
why it changes only the numbers 1.1, 1.4, 1.6, 1.9?
I accidentally make a wrong setting?

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Number in cell and formatting 8 years 4 months ago #8976

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i can confirm behavior of compilation with 32 bit compiler , but not with 64 bit compiler. With 64 bit all results are ok. i use windows 8.1 ct 5.7 rev. 005631

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Number in cell and formatting 8 years 4 months ago #8981

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Sir Sternas Stefanos,
I changed the precision in the row
Result := FloatToStrF(AValue, ffGeneral, 16, 16, fs);
//Result := FloatToStrF(AValue, ffGeneral, 20, 20, fs);
into the file fpsNumFormat.pas and everything is back to work.
what do you think about it?

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Number in cell and formatting 8 years 4 months ago #8983

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We put your fix to Lab CT Sir
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Number in cell and formatting 8 years 4 months ago #9001

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Using double for storing floating point numbers means that some numbers like 1.4 can not be stored, but instead closest number like 1.399999999999999 is stored. Similar is for single, too. This "feature" can be hidden by rounding numbers, like you have already found. This is not FPC related (although some FPC changes shows this more often then before), as can be seen here:
social.msdn.microsoft.com/Forums/en-US/e...ded-double-constants

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