1 files changed, 53 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/SNIP/stats.c b/reference/C/CONTRIB/SNIP/stats.c
new file mode 100755
index 0000000..c17f8d6
--- /dev/null
+++ b/reference/C/CONTRIB/SNIP/stats.c
@@ -0,0 +1,53 @@
+/****************************************************************/
+/*                                                              */
+/*      Collect file statistics                                 */
+/*                                                              */
+/*      Public domain demo program for analyzing encrypted      */
+/*      files. By: Bob Stout                                    */
+/*                                                              */
+/****************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <assert.h>
+
+main(int argc, char *argv[])
+{
+      int i, ch, hist = 0;
+      long n = 0L;
+      double mean = 0., stdev = 0., ftmp;
+      static unsigned bins[256];
+      FILE *infile;
+
+      assert(infile = fopen(argv[1], "rb"));
+      while (!feof(infile))
+      {
+            if (EOF == (ch = fgetc(infile)))
+                  break;
+            bins[ch] += 1;
+            ++n;
+      }
+      fclose(infile);
+      for (i = 0; i < 256; ++i)
+      {
+            mean += (double)(bins[i]);
+            if (bins[i])
+                  ++hist;
+      }
+      mean /= 256.;
+      for (i = 0; i < 256; ++i)
+      {
+            ftmp = (double)(bins[i]) - mean;
+            stdev += (ftmp * ftmp);
+      }
+      ftmp  = stdev / 255.;
+      stdev = sqrt(ftmp);
+      printf("%ld Characters were read from %s\n"
+            "There are an average of %f occurances of each character\n"
+            "%d Characters out of 256 possible were used\n"
+            "The standard deviation is %f\n"
+            "The coefficient of variation is %f%%\n",
+            n, argv[1], mean, hist, stdev, (100. * stdev) / mean);
+      return EXIT_SUCCESS;
+}