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lexical_cast and float

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Claude

19 Jun 2011 19 Jun '11

5:44 p.m.

Hi! I use this code to control if a sdt::string is a "float" value: string value("3.14"); try { lexical_cast<float>(value); } catch(bad_lexical_cast& ) { cout<http://boost.2283326.n4.nabble.com/lexical-cast-and-float-tp3609634p3609634.... Sent from the Boost - Users mailing list archive at Nabble.com.

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Igor R

19 Jun 19 Jun

5:56 p.m.

I use this code to control if a sdt::string is a "float" value:

string value("3.14"); try { lexical_cast<float>(value); } catch(bad_lexical_cast& ) { cout<
I always obtain a bad_lexical_cast exception.

Perhaps, your locale requires comma as fp: "3,14"

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Claude

7:55 p.m.

Thanks! :-) -- View this message in context: http://boost.2283326.n4.nabble.com/lexical-cast-and-float-tp3609634p3609835.... Sent from the Boost - Users mailing list archive at Nabble.com.

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asif saeed

20 Jun 20 Jun

7:10 a.m.

Hi, On Sun, Jun 19, 2011 at 10:56 PM, Igor R wrote:

...
string value("3.14"); try { lexical_cast<float>(value); } catch(bad_lexical_cast& ) { cout<
Perhaps, your locale requires comma as fp: "3,14"

But what if one did want to convert from "3.14" instead of "3,14"? How can one specify the customization in this case? Best regards, Asif

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Igor R

8:34 a.m.

...
Perhaps, your locale requires comma as fp: "3,14"

But what if one did want to convert from "3.14" instead of "3,14"? How can one specify the customization in this case?

I believe, the default C locale uses dot as decimal point, so setlocale(LC_ALL, NULL) should help.

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asif saeed
Claude
Igor R