math, time, seed and randomness - simple test

1 files changed, 32 insertions, 0 deletions

diff --git a/userspace/test-math.c b/userspace/test-math.c
new file mode 100644
index 0000000..acaecad
--- /dev/null
+++ b/userspace/test-math.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <math.h>
+#include <time.h>
+
+int main(int argc, char **argv) 
+{
+     time_t ltime;
+     time(&ltime); 
+     printf("the time is %s", ctime(&ltime));
+
+     unsigned int seed=time(NULL);
+     printf("seed = %u\n",seed);
+
+     srand(seed);
+
+     for(int i=0;i<10;i++)
+     {
+	 int r=rand()%100;
+	 printf("sin(%i) = %f \n",r,sin(r));
+     }
+
+
+     return 0;
+}
+
+
+
+
+