Hey guys what do you think of my highly optimized code :^)?

>Not using assembly
Come back when you're an actual programmer, kid.

I actually kind of like cin/cout, it's a guaranteed indicator that the poster is a first semester CS student and doesn't know shit.

>>59169662
What's better, passing in as an argument? Never really touched C++.

>>59169662
>College
>Implying

>>59169705
I'm fully convinced cin/cout was added to C++ to make it easier to do hello world.

>>59169589

> optimized

Streams are very inefficient senpai.

>>59169735
As opposed to what? printf? Give me a break.

Well, at least you're using CodeBlocks.

>>59169589
>no indentation
D R O P P E D

>>59169786
That's what makes it optimized desu

>>59169589
>no indentation
Unreadable.
>using a Windows IDE and probably a Windows compiler
>doesn't follow GNU standards
I barfed

>>59169825
the compiler doesn't see whitespace

>>59169827
What's a GNU standard?

File: 1488126240517.jpg (32KB, 853x465px) Image search: [Google]

32KB, 853x465px

>>59169825
Indentations and comments are stripped by the compiler...

rate

function isntprime(argument) {
    while (true) if (argument % Math.floor(Math.random()*100) === 0) break
    return true
}

>>59169847
Example of the GNU standard:

int
main (int argc, char *argv[])
{
  struct gizmo foo;

  fetch_gizmo (&foo, argv[1]);

 check:
  if (foo.type == MOOMIN)
    puts ("It's a moomin.");
  else if (foo.bar < GIZMO_SNUFKIN_THRESHOLD / 2
           || (strcmp (foo.class_name, "snufkin") == 0)
               && foo.bar < GIZMO_SNUFKIN_THRESHOLD)
    puts ("It's a snufkin.");
  else
    {
      char *barney;  /* Pointer to the first character after
                        the last slash in the file name.  */
      int wilma;     /* Approximate size of the universe.  */
      int fred;      /* Max value of the `bar' field.  */

      do
        {
          frobnicate (&foo, GIZMO_SNUFKIN_THRESHOLD,
                      &barney, &wilma, &fred);
          twiddle (&foo, barney, wilma + fred);
        }
      while (foo.bar >= GIZMO_SNUFKIN_THRESHOLD);

      store_size (wilma);

      goto check;
    }

  return 0;
}

return isPrime(input);

isPrime() is left as an exercise for the reader.

>>59169840
>>59169872
But it makes the source code smaller

>>59169988
who cares?
if you wanna compress text just tar and gzip it

>>59169988

Yes, we all get this. Stop being a smartass.

>>59169589
You need to be 18 years old to post here.

>>59169662
>>59169735
This is the worst kind of person

>>59169735
Tiers of C++ programmers:

>Newbie tier: thinks << syntax is so cool
>Disillusioned tier: le operator overloading is bad meme, le c++ is overcomplicated meme
>Ascended tier: found his inner peace, embraces the iostream

>>59169662
>t. someone who has never written C++ for a living

>>59169827
Kill yourself, you dumb fucking shit stain.

Cs101

>>59169589
Step it up.

|_  {bowl $~}
::
++  prim
  |=  x/@
  =+  i=2
  |-  ^-  ?
  ?:  =(x i)  &
  ?:  =(0 (mod x i))  |
  $(i +(i))
::
++  poke-noun
  |=  a/@
  ~&  ?:((prim a) [a %is-prime] [a %not-prime])
  [~ +>.$]
--

>>59170131
Have you been following me around recently?

>>59169662
WTF are you supposed to do for "solve this puzzle" type command line shit???

>>59169589
I'm gonna hurt you

for i:=1 to trunc(sqrt(x)) you retarded faggot

>>59169589
>abusing namespace std;

>>59170320
printf

non-descriptive, cryptic code != Optimized code

I took the bait

OP you only have to try factors up the square root of x

>>59169589
>using the smiley with a carat nose

step up your game nigga and use scanf/printf

>>59171368
just fwrite to stdout

>>59169589
No sieve of eratosthenes. Kill yourself.

>>59171368
Why?

>not putting it all on a single line
3/10, see me after class

>>59171450

iostream is way slower than cstdio.
but, the compiler replaces your brain when you're using iostream, because it's using type safety.

>>59169589
You should only loop until sqrt(x), all the other divisors can be obtained from x/i, where i is an integer smaller than sqrt(x).
For example:
Let's obtain the divisors of 20
1 2 4 5 10 20

Sqrt(20) is somewhere between 4 and 5.

20 is 20/1
10 is 20/2
And 5 is 20/4

So it's useless to check numbers above sqrt(x). Try it out!

File: 1488157846436.png (549KB, 1023x574px) Image search: [Google]

549KB, 1023x574px

>>59169589
>"Enter a Positive Integer"
>1

>>59169589
>highly optimized
>not using inline functions
>O(n) prime checker
>iostream and not write()
>unportable system() bullshit because you're too stupid to run your shit properly
>implying more chars = more slow
unreadable dogshit, 2/10

>>59171902
>isPrime(1)
>skips the for loop because 2 > 1
>returns true
It works you stupid shit

>>59169589
What does no formatting have to do with optimization?

>>59169589
0/8 total piece of crap

>>59169988
>optimizing for disk space
WHAT YEAR IS IT?

>>59172121
1 is not prime

File: a04.jpg (217KB, 1423x927px) Image search: [Google]

217KB, 1423x927px

>>59172207
shut up, we are glad it finally works

>i<x
>"""highly""" optimized
Agh

>>59170298
Wew hoon

>>59171616

You can also first check 2, then start the loop at 3 and increment by two each time - if the number is divisible by any even number, it is divisible by 2 anyway.