Re: Truncation of FLOAT values

[l117593@cliffy.lfwc.lockheed.com (Cordes MJ)]

Robert Dewar (dewar@cs.nyu.edu) wrote:

: First, you clearly meant to say subtract rather than round,

oops!

: e.g. 2.3 - 0.5 = 1.8, conversion rounds to 2 = integer part of 2.3

: but that's wrong, because

: 3.0 - 0.5 = 2.5, which is allowed in Ada 83 to round to 2 when you want 3.

Unless you are telling me that single implementation of an Ada compiler
_may_, in practice, round 2.5 to 3 and round 3.5 to 3, you can write
an implementation specific solution. However, in the case where a 
compiler does round x.5 to x (and not x+1), the solution is less
simple.

: There is no trivial solution  to this in Ada 83, which is why the
: truncation attribues was added to Ada 95.


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Michael J Cordes
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