#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#define PI 3.1415927
#define MAX(a,b) (a)>(b)?(a):(b)
#define RND (double)rand()/RAND_MAX
#define TRACE(args...) fprintf(stderr,args)
/* #define TRACE(args...) */

int main(){

	TRACE("MAX(0,1)=%g\n",MAX(0.0,1.0));

	srand(13);

	double x,a=0,b=10,dx=0.5;
	for(x=a;x<=b;x+=dx){
		double y=sin(x)+(RND-0.5)/2;
		double e=RND/2;
		printf("%g \t %g \t %g\n",x,y,e);
		}

return 0;
}