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From: Adam Beneschan <adam@irvine.com>
Newsgroups: comp.lang.ada
Subject: Re: Real Time IO routines
Date: Fri, 26 Oct 2007 15:34:24 -0700
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On Oct 26, 2:14 pm, andrew <andrew.carr...@okstate.edu> wrote:

> Something seems to be wrong though.  In my program I am basiclly
> doing:
>
> start := clock;
> --I run my algorithm here
> finish := clock;
> ada.Text_IO.put_line("time = " & duration'image(to_duration(finish -
> start)));
>
> the output is always time = 0.000000000.  I know it had to take some
> time because it takes about 10 seconds for the program to reach that
> point in the code.  Overflow maybe?

The RM says that "Time" is supposed to be able to represent a value,
from program start, of at least 50 years.  So if a 10-second program
is overflowing that time, you've got a problem.

I tried a program similar to the above on two different compilers,
with "delay 10.0" in the place where you have "I run my algorithm
here"; and in both cases the output is around 10.0.  I don't know why
you'd be seeing zero, assuming the system you're on has a working
clock.  What type of machine are you running on, and what compiler?

                      -- Adam