Restructured folders: examples, benchmarks, tests into misc folder.

1 files changed, 45 insertions, 0 deletions

diff --git a/misc/examples/random.c b/misc/examples/random.c
new file mode 100644
index 00000000..fe64290d
--- /dev/null
+++ b/misc/examples/random.c
@@ -0,0 +1,45 @@
+#include <stdio.h>
+#include <time.h>
+#include <stc/crandom.h>
+
+int main()
+{
+    const size_t N = 1000000000;
+    const uint64_t seed = time(NULL), range = 1000000;
+    stc64_t rng = stc64_new(seed);
+
+    uint64_t sum;
+    clock_t diff, before;
+
+    printf("Compare speed of full and unbiased ranged random numbers...\n");
+    sum = 0;
+    before = clock();
+    c_forrange (N)  {
+        sum += (uint32_t)stc64_rand(&rng);
+    }
+    diff = clock() - before;
+    printf("full range\t\t: %f secs, %" c_ZU ", avg: %f\n",
+           (float)diff / CLOCKS_PER_SEC, N, (double)sum / N);
+
+    stc64_uniform_t dist1 = stc64_uniform_new(0, range);
+    rng = stc64_new(seed);
+    sum = 0;
+    before = clock();
+    c_forrange (N)  {
+        sum += stc64_uniform(&rng, &dist1); // unbiased
+    }
+    diff = clock() - before;
+    printf("unbiased 0-%" PRIu64 "\t: %f secs, %" c_ZU ", avg: %f\n",
+            range, (float)diff/CLOCKS_PER_SEC, N, (double)sum / N);
+
+    sum = 0;
+    rng = stc64_new(seed);
+    before = clock();
+    c_forrange (N)  {
+        sum += stc64_rand(&rng) % (range + 1); // biased
+    }
+    diff = clock() - before;
+    printf("biased 0-%" PRIu64 "  \t: %f secs, %" c_ZU ", avg: %f\n",
+            range, (float)diff / CLOCKS_PER_SEC, N, (double)sum / N);
+
+}