lotto.c
changeset 3 820ed7fb9314
child 8 96d16dfe787a
new file mode 100644
--- /dev/null
+++ b/lotto.c
@@ -0,0 +1,252 @@
+/**
+ * $Id: main.c,v 1.1.1.1 2008-04-28 17:32:53 mbroeker Exp $
+ * $Author: mbroeker $
+ *
+ * lotto.c
+ * computes the best n lottery-values from m loops out of [1..end]
+ *
+ *  ------------------------------------------------------------------------------
+ * | ==18509== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 13 from 1)    |
+ * | ==18509== malloc/free: in use at exit: 0 bytes in 0 blocks.                  |
+ * | ==18509== malloc/free: 10,003 allocs, 10,003 frees, 280,600 bytes allocated. |
+ *  ------------------------------------------------------------------------------
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <time.h>
+
+#ifndef DEBUG
+#warning "NO DEBUG SUPPORT: COMPILE with -DDEBUG"
+#endif
+
+#define ONESECOND 500000
+
+typedef long int LONG;
+
+/*
+ * compare function for qsort
+ */
+
+LONG compare (LONG * a, LONG * b)
+{
+    if (*a > *b)
+        return 1;
+    else
+        return -1;
+}
+
+/*
+ * lottery number generator for num values [ 1..end ]
+ */
+
+LONG *lottery (LONG end, LONG num)
+{
+    int i, j;
+    LONG *z;
+    int unique;
+
+    if ((z = (LONG *) calloc (num + 1, sizeof (int))) == NULL)
+        exit (0);
+
+    for (i = 0; i < num; i++) {
+        do {
+            z[i] = 1 + (int)((float)end * rand () / (RAND_MAX + 1.0));
+            unique = 1;
+            for (j = 0; j < i; j++) {
+                if (z[j] == z[i]) {
+                    unique = 0;
+                    break;
+                }
+            }
+        } while (!unique);
+    }
+
+    qsort (z, num, sizeof (int), (void *)&compare);
+
+    return z;
+}
+
+/*
+ * evaluates an array of numbers with num elements
+ */
+
+LONG *evaluation (LONG * numbers, int num, int verbose)
+{
+    int i, j, k;
+    int printed;
+    LONG *values;
+    LONG *z;
+
+    int found;
+
+    if (verbose) {
+        printf ("\nProbabilistic evaluation\n------------------------\n");
+        for (i = 0; i < num; i++)
+            printf ("%4d: %8ld times\n", i + 1, numbers[i]);
+        printf ("\n");
+    }
+
+    if ((values = calloc (num + 1, sizeof (int))) == NULL)
+        exit (0);
+
+    if ((z = calloc (num + 1, sizeof (int))) == NULL)
+        exit (0);
+
+    for (j = 0; j < num; j++) {
+        values[j] = numbers[j];
+    }
+
+    qsort (numbers, num, sizeof (int), (void *)&compare);
+
+    /*
+     * numbers = sorted list
+     * values  = unsorted list
+     */
+
+    printed = k = 0;
+
+#ifdef DEBUG
+    printf ("The following algorithm seems to be too slow\n");
+#endif
+
+    /*
+     * REPLACE THIS
+     */
+
+    for (i = 0; i < num; i++)
+        for (j = 0; j < num; j++) {
+            if (numbers[i] == values[j]) {
+                found = 0;
+                for (k = 0; k < printed; k++)
+                    if (z[k] == j) {
+                        found = 1;
+                        break;
+                    }
+
+                if (!found)
+                    z[printed++] = j;
+            }
+        }
+
+#ifdef DEBUG
+    printf ("The algorithm ran %d times\n", i * j * k);
+#endif
+
+    /*
+     * SLOW PIECE OF CODE
+     */
+
+    free (values);
+
+    return z;
+};
+
+int main (int argc, char **argv)
+{
+    LONG *values;
+    LONG *numbers;
+    LONG max;
+
+    int i, j;
+
+    int found;
+    int loop;
+
+    int verbose, wide, end, num;
+
+    verbose = wide = 0;
+    end = 49;
+    num = 6;
+    max = ONESECOND;
+
+    while ((i = getopt (argc, argv, "m:e:n:vwh")) >= 0) {
+        switch (i) {
+        case 'm':
+            max = atol (optarg);
+            break;
+        case 'e':
+            end = atoi (optarg);
+            break;
+        case 'n':
+            num = atoi (optarg);
+            break;
+        case 'v':
+            verbose = 1;
+            break;
+        case 'w':
+            verbose = 1;
+            wide = 1;
+            break;
+        case 'h':
+            printf ("Usage: %s [ -e end | -m max | -n num | -v | -w ]\n", argv[0]);
+            printf ("       -e: Numbers from [1..end]\n");
+            printf ("       -m: evaluates max loops\n");
+            printf ("       -n: n-numbers from [1..end]\n");
+            printf ("       -v: verbose output\n");
+            printf ("       -w: verbose and wide output\n");
+            return 0;
+        }
+    }
+
+    if (num >= end)
+        num = end - 1;
+
+    srand (time (NULL));
+
+    if ((numbers = calloc (end + 1, sizeof (int))) == NULL)
+        exit (0);
+
+    for (loop = 0; loop < end; loop++)
+        numbers[loop] = 0;
+
+    for (loop = 0; loop < max; loop++) {
+        values = lottery (end, num);
+        for (i = 0; i < end; i++) {
+            found = 0;
+            for (j = 0; j < num; j++)
+                if (values[j] == i + 1) {
+                    if (verbose)
+                        printf ("%3s", "XX");
+
+                    numbers[i]++;
+                    found = 1;
+                    break;
+                }
+
+            if (verbose) {
+                if (!found)
+                    printf ("%3d", i + 1);
+            }
+
+            if (wide) {
+                if ((i % 7) == 0)
+                    printf ("\n");
+            }
+        }
+
+        if (verbose)
+            printf ("\n");
+
+        free (values);
+    }
+
+    values = evaluation (numbers, end, verbose);
+
+    for (i = 0; i < num; i++)
+        numbers[i] = values[(end - 1) - i];
+
+    qsort (numbers, num, sizeof (int), (void *)&compare);
+
+    for (i = 0; i < num; i++)
+        printf ("%ld ", numbers[i] + 1);
+
+    printf ("\n");
+
+    free (values);
+    free (numbers);
+
+    return 0;
+}