tan functions

[elevationsnow]

need help using atan2 function
code so far just excerpts

Code: Select all

#include <math.h>

#define PI 3.14159265

    while&#40;1&#41;&#123;
         sceCtrlReadBufferPositive&#40;&pad, 1&#41;;
         x= pad.Lx - 130;
         y= pad.Ly - 130;
         rotation = float atan2 &#40;x,y&#41; /&#40;PI/180&#41;;
         for&#40;loop=0; loop < 10; loop++&#41;&#123;
         printf&#40;"rotation&#58; %i",rotation&#41;;
         &#125;
    &#125;

what it should do:
find the rotation of the analog stick just for testing purposes

error codes:
undefined reference to atan2
error 1

[Agoln]

did you link in the math library? (-lm)