comparing double to integer

[cool dude]

how would i compare a number that is declared as a double although it is an integer that just has a zero at the end. ex: 123.0 to an integer. i can't declare the double number as an integer because i'm using Math.Pow and it always makes it double, but i wanna take the answer from that and see if it equals to an integer number. for example does 123.0 = 123. this will not be equal, thus i will not get any results. any suggestions?

[Justin_]

Have you tried: instead of casting the Math.Pow variable cast the integer you are comparing to a float? Just a suggestion.

(Math.Pow.float_int == (float) int_variable)

[Justin_]

Or wait, I misunderstood. Just cast the double returned from Math.Pow and compare...

if ((int) power_returned == int_)

[wtd]

Keep in mind that floating point numbers are inherently imprecise. Thus it can be difficult to directly compare two such numbers for equality.

[r.3volved]

also, casting a double to an int will either truncate the decimals or round them...

You would have to cast your integer to a double to compare the two, not visa versa

[bugzpodder]

add some epsilon constant to the result and truncate it by casting to an int

[McKenzie]

Floating point numbers are imprecise only when representing fractions, or extreamely large numbers. Casting it should be fine.

[bugzpodder]

http://www.topcoder.com/tc?module=Static&d1=tutorials&d2=integersReals

[bugzpodder]

cool! i forgot all about x&(x-1) !! now i can use it to improve my AI