Hi there,
I have a float called counter that goes from 0 to 31 and then back to 0. I want to be able to specify a number x (0-31) and a threshold th, and check if the number is within th units from the counter.
Sounds easy at first:
if( abs(x - counter) <= th )
But this doesn't work if x is close to 0 and counter is close to 31. I've thought about this for quite a while but can't seem to come up with a solution. Help would be greatly appreciated!
First of all the abs function has this prototype:
int abs(int j);
It aspects an int not a float.
Use one of this instead:
#include <math.h>
double fabs(double x);
float fabsf(float x);
I have stopped reading Stephen King novels. Now I just read C code instead.
Thanks ralu, I'm using a language very similar to C but which has an abs function that is overloaded for many types.
Code:Anyway, I found a solution: if(abs(a - (ctr % 32)) <= threshold) return true; else if(abs(32 + a - (ctr % 32)) <= threshold) return true; else return false;
