A little help?

[D4rkL3on]

Hi a friend give me this exercise to tell him which the solution is but I don't know C if anyone can solve this it will be very helpfully

To write a program (only using operators and without orders if / for / while etc) to read a positive integer , and displays the nearest larger number that is power of 2. For example, if the user enters 35, program display 64 (after 2 ^ 5 = 32 < 35 < 64 = 2 ^ 6)

[0pt1musPr1m3]

he probably gave you that exercise so that you would fucking learn something.

This is basic shit bruh, go figure it out.

[D4rkL3on]

he didn't gave to me to solve it myself he doesn't know the solution and he wants to learn it

[Kurajber]

(only using operators and without orders if / for / while etc)

Not sure why is that.
 
Anyways, here's how you use logarithms in C:
http://www.codecogs.com/library/computing/c/math.h/log.php

[D4rkL3on]

thank you

[ArkPhaze]

You don't need to use log for this:

Code: [Select]

#include <stdio.h>

int main(void)
{
  unsigned int v = 35;

  v |= v >> 1;
  v |= v >> 2;
  v |= v >> 4;
  v |= v >> 8;
  v |= v >> 16;

  printf("%u\n", -~v);
  return 0;
}

[Kurajber]

Interesting code, I'm not sure if you think that this guy can understand bitwise operations or just shared this for others, but, anyway, interesting.