Click here to Skip to main content
11,718,589 members (83,765 online)
Rate this: bad
Please Sign up or sign in to vote.
See more: c/c++
I need your help writing in C, compile with GCC.


int i will get from user command line;
the main function is to get x;
x will output as integer;
if x output as float,i.e, 3.2, the function outputs 3 dropping value behind " . ";
how to write in C Program?
I appreciate any kind of programming type and your help.
I'm beginner.
Posted 27-Sep-12 19:03pm
Edited 27-Sep-12 19:06pm
Kenneth Haugland at 28-Sep-12 1:06am
x = Math.Log(3000)/Math.Log(2) ?
Spacez Ly Wang at 28-Sep-12 1:28am
Thank you, Maths Genius.
Kenneth Haugland at 28-Sep-12 1:29am

1 solution

Rate this: bad
Please Sign up or sign in to vote.

Solution 1

The thing is called "binary logarithm". Isn't there a log2(number) function in C++? If not, then take some other logarithm, and some math: log(number)/log(2).

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

  Print Answers RSS
0 Sergey Alexandrovich Kryukov 651
1 OriginalGriff 210
2 F-ES Sitecore 185
3 Jochen Arndt 160
4 Maciej Los 130
0 OriginalGriff 535
1 Maciej Los 529
2 Richard MacCutchan 440
3 CHill60 415
4 F-ES Sitecore 415

Advertise | Privacy | Mobile
Web01 | 2.8.150901.1 | Last Updated 28 Sep 2012
Copyright © CodeProject, 1999-2015
All Rights Reserved. Terms of Service
Layout: fixed | fluid

CodeProject, 503-250 Ferrand Drive Toronto Ontario, M3C 3G8 Canada +1 416-849-8900 x 100