[Qt-interest] QString::number question

[Constantin Makshin]

On Wednesday 26 May 2010 22:39:41 Marc Ferland wrote:
> ...
> Am I forced to use a small epsilon to detect when the value is near
> zero?
It's a bad idea to compare floating point values directly (a == b) no matter what is the number you're comparing with. You should always check that the difference between two numbers is less than some very small value (fabs(a - b) < epsilon) to consider these numbers equal.