/* nag_dawson (s15afc) Example Program.
 *
 * Copyright 2002 Numerical Algorithms Group.
 *
 * Mark 7, 2002.
 */

#include <nag.h>
#include <nagx04.h>
#include <stdio.h>
#include <nag_stdlib.h>
#include <nags.h>

int main(int argc, char *argv[])
{
  FILE    *fpin, *fpout;
  double  x, y;
  Integer exit_status = 0;

  /* Check for command-line IO options */
  fpin = nag_example_file_io(argc, argv, "-data", NULL);
  fpout = nag_example_file_io(argc, argv, "-results", NULL);

  /* Skip heading in data file */
  fscanf(fpin, "%*[^\n]");
  fprintf(fpout, "nag_dawson (s15afc) Example Program Results\n");
  fprintf(fpout, "       x            y\n");
  while (fscanf(fpin, "%lf", &x) != EOF)
    {
      /* nag_dawson (s15afc).
       * Dawson's integral
       */
      y = nag_dawson(x);
      fprintf(fpout, "%12.3e %12.3e\n", x, y);
    }

  if (fpin != stdin) fclose(fpin);
  if (fpout != stdout) fclose(fpout);
  return exit_status;
}