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   1 #include <stdio.h>
   2 #include <string.h>
   3 #include "config.h"
   4
   5 /**
   6  * tally - running tally of integers
   7  *
   8  * The tally module implements simple analysis of a stream of integers.
   9  * Numbers are fed in via tally_add(), and then the mean, median, mode and
  10  * a histogram can be read out.
  11  *
  12  * Example:
  13  *      #include <stdio.h>
  14  *      #include <err.h>
  15  *      #include <ccan/tally/tally.h>
  16  *
  17  *      int main(int argc, char *argv[])
  18  *      {
  19  *              struct tally *t;
  20  *              unsigned int i;
  21  *              size_t err;
  22  *              ssize_t val;
  23  *              char *histogram;
  24  *
  25  *              if (argc < 2)
  26  *                      errx(1, "Usage: %s <number>...\n", argv[0]);
  27  *
  28  *              t = tally_new(100);
  29  *              for (i = 1; i < argc; i++)
  30  *                      tally_add(t, atol(argv[i]));
  31  *
  32  *              printf("Mean = %zi\n", tally_mean(t));
  33  *              val = tally_approx_median(t, &err);
  34  *              printf("Median = %zi (+/- %zu)\n", val, err);
  35  *              val = tally_approx_mode(t, &err);
  36  *              printf("Mode = %zi (+/- %zu)\n", val, err);
  37  *              histogram = tally_histogram(t, 50, 10);
  38  *              printf("Histogram:\n%s", histogram);
  39  *              free(histogram);
  40  *              return 0;
  41  *      }
  42  *
  43  * License: LGPL (3 or any later version)
  44  * Author: Rusty Russell <rusty@rustcorp.com.au>
  45  */
  46 int main(int argc, char *argv[])
  47 {
  48         if (argc != 2)
  49                 return 1;
  50
  51         if (strcmp(argv[1], "depends") == 0) {
  52                 printf("ccan/build_assert\n");
  53                 printf("ccan/likely\n");
  54                 return 0;
  55         }
  56
  57         return 1;
  58 }