[Boost-users] Help! //回复:Re: [units] Conversions from quantities

Always deadlock, what is the problem, who can review my code attached in the ticket and give me an answer? Thanks very much . My problem url: https://svn.boost.org/trac/boost/ticket/11537 At 2015-08-14 03:20:47, "Michael Powell" wrote:

On Thu, Aug 13, 2015 at 3:14 PM, Steven Watanabe wrote:

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AMDG

On 08/12/2015 04:39 PM, Michael Powell wrote:

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Just wanted to clarify something. These should convert from given quantities to the desired units?

If what you really want is a raw double, than, yes, this should work.

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double unit_conversion::from_length_to_inches(quantity<length> const & L) { const quantity result_(L); return result_.value(); }

double unit_conversion::from_mass_to_pounds(quantity<mass> const & M) {

Pounds is a unit of force, not mass. To do such a conversion, you need to multiply by g.

Pound-force (literally, "lbf") or pounds (i.e. "lb")? Interestingly enough, I may also need to work in Pound-force, or a neighboring unit, i.e. "slugs.ft/s"

http://en.wikipedia.org/wiki/Pound_(mass)

http://en.wikipedia.org/wiki/Pound_(force)

Would you mind disambiguating that in terms of Boost.Units? As far as I can tell from the US base unit (BOOST_UNIT_SYSTEMS_US_POUND_HPP_INCLUDED), we're talking about Mass in this instance.

Thank you...

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const quantity result_(M); return result_.value(); }

In Christ,

BTW, did you find the PR okay for next version(s) of Units and/or Boost?

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Steven Watanabe

In Him.

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