Re: Does the order matter to add a sequence of floating numbers
- From: Richard Heathfield <rjh@xxxxxxxxxxxxxxx>
- Date: Tue, 30 Oct 2007 16:29:00 +0000
JosephLee said:
Let's say float arr[100], we want to add them up, does the order
matter? what is the different between arr[0] +..+ arr[99], and
arr[99]+...+arr[0]?
You wouldn't think it would make a difference, would you? But it can,
nevertheless, especially when some or all of the values are near the
limits of what can be represented.
I tried fairly hard to write a program to demonstrate this, and failed. :-)
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