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Hello everybody
I am writing a program that uses floats, but I have some problems.
If I write
/******/
float p;
p = 0.3;
if(p == 0.4)
do something;
/******/
The if statement evaluates to true.
Is there anything special I have to do to use floats in legOS? Or am I
doing something wrong. All help will be greatly appreciated.
Niels Sandholt Busch
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Message has 3 Replies:
 | | Re: Floating ponts ??
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| (...) Double check the actual program you are test to make sure that you don't have: p = 0.4 /* Only one = */ This is the number one "c" typo and is easy to overlook Lester been there, done that (23 years ago, 4-May-01, to lugnet.robotics.rcx.legos)
| | | Re: Floating ponts ??
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| Hi there! (...) 0th law of computer science: NEVER use == on floats; it simply doesn't work as expected. In most cases a value cannot be exactly represented as a float variable; so MOST comparisons for equality WILL fail. (this is NOT an issue of (...) (23 years ago, 17-May-01, to lugnet.robotics.rcx.legos)
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