Demo on the uses of the static reserved word

ch_04/static_demo/number.h

@@ -0,0 +1,12 @@
+
+
+/* Does something to a number. This function is static and
+ * will not be accessible outside of this file. Functions and
+ * variables defined as static are not visible to outside
+ * files. This function is private to this file and can only
+ * be called from within.
+ */
+static void do_something(void);
+
+
+int Number_get_number(void);