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Re: Value with type float [message #58235 is a reply to message #58234]

Fri, 01 April 2022 14:03

Tom1
Messages: 1302
Registered: March 2007

Ultimate Contributor

Hi,

The following code portrays the float rounding issue:

#include <Core/Core.h>

using namespace Upp;

CONSOLE_APP_MAIN
{
	Value v(0.002f);
	Cout() << v << "\n";
	Cout() << FormatDouble(v) << "\n";
	Cout() << FormatG(v,7) << "\n";
}

The result of running the above follows:

0.0020000000949949
0.0020000000949949
0.002
<--- Finished, press [ENTER] to close the window --->

I do not know how to solve this cleanly. In any case a regular user seeing 0.002000000095 in a field where he expects to see 0.002, will not be happy about it. For years I have used roundr() all over the code to fix this up, but having a solution hidden in Core would be awesome! Smile

Best regards,

Tom

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[Message index]

		Value with type float By: abductee23 on Thu, 03 March 2022 13:34
		Re: Value with type float By: mirek on Sat, 19 March 2022 10:38
		Re: Value with type float By: abductee23 on Thu, 31 March 2022 11:51
		Re: Value with type float By: Tom1 on Thu, 31 March 2022 13:49
		Re: Value with type float By: Tom1 on Thu, 31 March 2022 15:14
		Re: Value with type float By: mirek on Fri, 01 April 2022 11:07
		Re: Value with type float By: Tom1 on Fri, 01 April 2022 11:13
		Re: Value with type float By: Tom1 on Fri, 01 April 2022 12:06
		Re: Value with type float By: Tom1 on Fri, 01 April 2022 14:03
		Re: Value with type float By: Tom1 on Fri, 01 April 2022 15:26
		Re: Value with type float By: mirek on Sat, 02 April 2022 01:31
		Re: Value with type float By: mirek on Sat, 02 April 2022 01:31
		Re: Value with type float By: mirek on Sat, 02 April 2022 09:43
		Re: Value with type float By: Tom1 on Sat, 02 April 2022 10:55
		Re: Value with type float By: mirek on Sat, 02 April 2022 11:26
		Re: Value with type float By: Tom1 on Sat, 02 April 2022 13:31
		Re: Value with type float By: mirek on Mon, 11 April 2022 16:52
		Re: Value with type float By: Tom1 on Tue, 12 April 2022 09:26
		Re: Value with type float By: mirek on Tue, 12 April 2022 13:40
		Re: Value with type float By: Tom1 on Tue, 12 April 2022 13:54
		Re: Value with type float By: Tom1 on Tue, 10 May 2022 13:21
		Re: Value with type float By: mirek on Tue, 10 May 2022 15:44
		Re: Value with type float By: Tom1 on Tue, 10 May 2022 20:08
		Re: Value with type float By: mirek on Tue, 10 May 2022 21:26
		Re: Value with type float By: Tom1 on Wed, 11 May 2022 08:20
		Re: Value with type float By: mirek on Fri, 03 June 2022 10:52
		Re: Value with type float By: Tom1 on Fri, 03 June 2022 12:03
		Re: Value with type float By: mirek on Wed, 04 October 2023 09:55
		Re: Value with type float By: Tom1 on Wed, 04 October 2023 12:08
		Re: Value with type float By: mirek on Fri, 06 October 2023 12:51
		Re: Value with type float By: Tom1 on Fri, 06 October 2023 13:40
		Re: Value with type float By: mirek on Fri, 06 October 2023 13:54
		Re: Value with type float By: Tom1 on Fri, 06 October 2023 14:28
		Re: Value with type float By: mirek on Mon, 30 October 2023 10:34
		Re: Value with type float By: Tom1 on Mon, 30 October 2023 12:27
		Re: Value with type float By: mirek on Mon, 30 October 2023 13:37
		Re: Value with type float By: mirek on Fri, 01 April 2022 11:03
		Re: Value with type float By: jimlef on Tue, 06 September 2022 01:41
		Re: Value with type float By: Oblivion on Tue, 06 September 2022 22:42
		Re: Value with type float By: jimlef on Thu, 08 September 2022 14:49

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