[BUG] maybe or please explain me if I'm wrong

Question

https://code.sololearn.com/cGA5S2L0DhZo/?ref=app

Answer 1

Yeah. SL is buggy af
Found out today morning
Drove me nuts lol

Answer 2

my original theory was correct perhaps

Answer 3

yes. floating point values are never to be trusted to be whole numbers that 10 is like a 9.87657743 or something dumb

Answer 4

seeds of doubt were getting sown in my head lol.. glad we sorted it otherwise I would of gone a bit crazy! :) I was sure i thought correctly. but i guess the moral of the story here is assume nothing. investigate everything

Answer 5

lol its bugging me now too lol

Answer 6

https://code.sololearn.com/c86d015HFYVY/?ref=app

check this.. maybe thats it there

Answer 7

Think I found the answer..

if any datatype in a formula is floating point/double type all types are converted to this for the calculation

http://www.brighthub.com/computing/linux/articles/11239.aspx

Answer 8

what happens if they are done seperately?

convert pow function. store that. then do the multiply?

Answer 9

true words!

Answer 10

So the conclusion is if we store a double value to int, no matter whether it is integer or decimal, some of the data is still lost.

Answer 11

I suggest you don't use power function for ints, as the numbers get messed up during conversion from double to int and so lose some precision.

If you save this in a double, you will get 600, not 599.

Eg - Trying pow(5,2) usually returns 24, but 5*5 always returns 25...

This is just a case of lost precision, as 5.0*5.0 is taken by the PC as 4.999 and 4.999 and their product is 24.999867 which is floored for int conversion to 24 and given to you...

IDK why that happens, but this is why the answers are wrong...

So, please try forcing the result to be of type double or float...

Answer 12

But all the variable are int except "pow" and if i convert it implicitly to int then it further reduces to
6*100=594

Answer 13

Let me try it

Answer 14

@jay
I think the difference lies in implicit type conversion, because as in your code the double variable gives exact answer but in my code integer variable gives wrong answer.

Answer 15

No progress, still the same results.