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I have the following code:
C
#include<stdio.h>
#include<math.h>
int main() {

  double R;      
  double omega;   
  double x, y,t;
  R=6.2;
  omega=0.1;
  t=0;
  x=R*cos(omega*t);
  y=R*sin(omega*t);
  printf("t=%lf\n x=%lf\n y=%lf\n",t, x, y);
}




When compiling it with gcc test.c I get the following error, and I can't work out why:
/usr/bin/ld: /tmp/ccf5Bi7l.o: in function `main':
circle.c:(.text+0x5e): undefined reference to `cos'
/usr/bin/ld: circle.c:(.text+0x7b): undefined reference to `sin'
collect2: error: ld returned 1 exit status


What I have tried:

Can someone help me with this problem?
Posted
Updated 28-Dec-20 21:05pm
v2

1 solution

You must link with the math library.
gcc test.c -lm
 
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Comments
CPallini 29-Dec-20 2:05am    
5.
Shao Voon Wong 29-Dec-20 2:22am    
Thanks!

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