sin/cos of i

[MK27]

Why does this:

#include <stdio.h>
#include <math.h>

int main () {
	float i;
	for (i=0.0f;i<3.1415f;i+=0.1f) printf("%f sin=%f cos=%f\n",i,sin(i),cos(i));
}

cause this:
undefined reference to `cos'
undefined reference to `sin'

[laserlight]

You may need to link the math library, e.g., -lm with gcc.