From: emery@gypsy.UUCP
Subject: An Ada quiz on type conversions
Date: Mon, 27-Oct-86 16:33:00 EST [thread overview]
Date: Mon Oct 27 16:33:00 1986
Message-ID: <38000033@gypsy.UUCP> (raw)
quiz time, Ada fans:
consider
declare
x : integer;
y : my_float := 1.5;
begin
x := integer(y);
end;
What is the value of x?
(a) 1
(b) 2
(c) constraint_error is raised
(d) it depends
The right answer is (d), it depends.
"4.6 (a)
... The conversion of a real value to an integer type rounds
to the nearest integer; if the operand is halfway between two
integers (within the accuracy of the real subtype), rounding may
be either up or down.
"
So the implementor can pick how he wants to round. This strikes me as
a portability bug, but, on the other hand, I don't have a lot of sympathy
for people who depend on these kinds of type conversion....
Dave Emery
Siemens Research
...princeton!siemens!emery
princeton!siemens!emery@seismo.css.gov
next reply other threads:[~1986-10-27 21:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
1986-10-27 21:33 emery [this message]
1986-11-03 13:59 ` An Ada quiz on type conversions Anton Gibbs
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