ERROR:_radians Referenced From

Question

It might be duplicate. But what my problem is i added the CGPointUtils.c/.h into my project. I got the error in the .h file. error is "_radiansToDegree" referenced from like CGRect referenced from error message.

I checked the code everything in it is correct, CGFloat data types it returns radiansToDegree(rads). This is where i got the error.

code:

CGFloat angleBetweenPoints(CGPoint first, CGPoint second) {
CGFloat height = second.y - first.y;
CGFloat width = first.x - second.x;
CGFloat rads = atan(height/width);
return radiansToDegrees(rads);

In the last line, where the error is? Could any one give me a solution for that. Thanks

Answer 1

radiansToDegrees isn't in math.h.

Probably the simplest solution is to write one, (it's just a multiply by 180/M_PI).