posted 7 years ago
Have just spent 2 frustrating hours debugging a bouncing ball program that wasn't behaving correctly.
It turned out it was because I had a formula that was something like
So if b is 2 and c is 8, a = ...
yes, that's right, 2.
Seriously, why is Java this stupid?
It turned out it was because I had a formula that was something like
So if b is 2 and c is 8, a = ...
yes, that's right, 2.
Seriously, why is Java this stupid?
posted 7 years ago
Well, a, b, and c were doubles.
Looking at it from a beginner's perspective, it's definitely a bit strange that 1/2 == 0.
I just checked in VB, and it returns 0.5 there, even if you explicitly define two variables as integers and divide one by the other.
+ the whole of mathematics since the dawn of civilization, 1/2 has always been... well, 1/2, not 0.
At least throw a compiler warning or something.
Looking at it from a beginner's perspective, it's definitely a bit strange that 1/2 == 0.
I just checked in VB, and it returns 0.5 there, even if you explicitly define two variables as integers and divide one by the other.
+ the whole of mathematics since the dawn of civilization, 1/2 has always been... well, 1/2, not 0.
At least throw a compiler warning or something.
posted 7 years ago
1/2 with integers always has been 0 since the beginning of computers. That is the way it's implemented in the hardware and there is also a variant for floating point calculation. And throwing a warning will not help. What would that warning be: Warning you're using integer to calculate stuff
"Any fool can write code that a computer can understand. Good programmers write code that humans can understand."  Martin Fowler
Please correct my English.
posted 7 years ago
ummm...I'm not sure you know your math history. The concept of fractions is a relatively new concept, as compared to some others. Think about it...when you were first learning how do divide, did you say that 7 / 3 = 2.333333...., or did you say it was 2 with a remainder of 1?
 1
Luigi Plinge wrote: the whole of mathematics since the dawn of civilization, 1/2 has always been... well, 1/2, not 0.
ummm...I'm not sure you know your math history. The concept of fractions is a relatively new concept, as compared to some others. Think about it...when you were first learning how do divide, did you say that 7 / 3 = 2.333333...., or did you say it was 2 with a remainder of 1?
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