Subject:
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IC Floating Point Bug
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 27 Jul 1998 23:59:45 GMT
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Original-From:
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Rick Moll <rickmoll@[avoidspam]mvp.net>
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Viewed:
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1147 times
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I've been making use of floating point for the first time on the HB and
am having problems. The following program demonstrates the kinds of
bugs I've been encountering:
----(cut here)-----------------------------------
int
main()
{
float a;
float b;
float c;
/*
This program prints out the proper values for
"a" and "b", but prints "c" to be ".1250034"
rather than something closer to "0.25" as expected.
*/
a = 1.570796;
b = 6.2831;
c = a/b;
printf("%f %f %f\n", a, b, c);
}
----(cut here)-----------------------------------
I would appreciate hearing if others can duplicate this bug. I'm using
the standard "free" IC off of the "ic2853r2.zip" file.
Thanks for your help,
Rick
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Message has 3 Replies:
 | | Re: IC Floating Point Bug
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| (...) <snip> I get the same results with version 3.2. Curiously, if I remove the last digit in the a = 1.570796 statement (or replace it with a zero), then I get the correct answer. I guess it has something to do with specifying too many significant (...) (26 years ago, 28-Jul-98, to lugnet.robotics.handyboard)
| | | RC Car Robot Base
|
| All: I am trying to find a World Scale RC Car/Truck base for my robot. One of the items I have been looking at was the Thunder King RC Monster Truck from MRC/Tower Hobbies, but they have recently discontinued that part. Does anyone have any (...) (26 years ago, 8-Aug-98, to lugnet.robotics.handyboard)
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