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How should I answer a question of someone else in Stack Overflow?

I came across this post:

http://stackoverflow.com/questions/tagged/cimg+fftw

and wanted to answer:

you can define cimg_use_fftw3 before including CImg, i.e.

#define cimg_use_fftw3 1
#include "CImgpp.h"

Then Cimg will use the fftw3 FFT instead of it's own version which only allows for 2^n-sized (i.e. 1,2,...,1024,2048, etc) inputs. Then call the FFT() method of the CImg struct:

http://cimg.sourceforge.net/reference/structcimg__library_1_1CImg.html#aab0887ae7c3bd1571ea7ccc4a8cac3f6

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Go answer that question. Don't create a new question. There's a big text box underneath the question. –  recursive Mar 3 '11 at 15:55
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Are you asking how to actually submit an answer, or whether your proposed answer is acceptable, or something else? –  Pops Mar 3 '11 at 16:13
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migrated from stackoverflow.com Mar 3 '11 at 15:55

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2 Answers

You're talking about this question?

The filled-in green check next to @CookieOfFortune's answer indicates that the question is already answered. If you still want to answer it, just type your answer in the "Your Answer" box.

enter image description here

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I have that font too: "Paintbrush Gothica Narrow" –  belisarius Mar 3 '11 at 16:14
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I wonder if my answer got 4 upvotes so that it would look just like the picture (and further confuse the OP). –  Matt Ball Mar 3 '11 at 16:15
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Scroll down to the bottom of the page. Where it says "Your Answer" and and has a large textarea is where you would post your answer.

And you can format your code by highlighting it and pressing the { } button.

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