/* nag_mills_ratio (g01mbc) Example Program.
 *
 * Copyright 2001 Numerical Algorithms Group.
 *
 * Mark 7, 2001.
 */

#include <stdio.h>
#include <nag.h>
#include <nagx04.h>
#include <nag_stdlib.h>
#include <nagg01.h>

int main(int argc, char *argv[])
{
  FILE    *fpin, *fpout;
  /* Scalars */
  Integer exit_status = 0;
  double  rm, x, xmu, xsig, z;
  Integer i;

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

  fprintf(fpout, "nag_mills_ratio (g01mbc) Example Program Results\n");

  /* Skip heading in data file */
  fscanf(fpin, "%*[^\n] ");

  fprintf(fpout, "\n%2sMean%5sSigma%4sX%8sReciprocal", "", "", "", "");
  fprintf(fpout, "\n                             Mills Ratio\n\n");
  for (i = 1; i <= 3; ++i)
    {
      fscanf(fpin, "%lf%lf%lf%*[^\n] ", &x, &xmu, &xsig);
      z = (x - xmu) / xsig;
      /* nag_mills_ratio (g01mbc).
       * Computes reciprocal of Mills' Ratio
       */
      rm = nag_mills_ratio(z) / xsig;
      fprintf(fpout, "%7.4f%2s%7.4f%2s%7.4f%2s%7.4f", xmu, "", xsig, "", x, "",
              rm);
      fprintf(fpout, "\n");
    }

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