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

int main()
{
  double xmin=0,xmax=3.14,dx=0.01,x;
  FILE *F;

  x=xmin;
  F=fopen("sin.txt","w");
  while (x<xmax) {
    fprintf(F,"%f %f\n",x,sin(x));
    x=x+dx;
  }
  fclose(F);
  return 0;
}