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

#define MULT 0.5
int main (int argc, char *argv[]) {
  float x,y,r;
  float pi = 3.14159265358979323846264338327950288;
  int i = 0;
  if (argc != 2) {
    fprintf (stderr, "wrong number of arguments (one expected)\n");
    exit (1);
  }
  sscanf(argv[1],"%f", &x);
  while (x != 0) {
     y = sin(x);
    // y = sin(x+2*pi);
    r = x/y;
    printf("%d: x=%.10f, sin(x) = %.10f, sin(x)/x = %.10f\n",i,x,y,r);
    printf("%d: x=%.10g, sin(x) = %.10g, sin(x)/x = %.10g\n",i,x,y,r);
    x = x*MULT;
    i++;
  }
}