Ruby examples added.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@853 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/ruby/pointer/example.c

@@ -0,0 +1,16 @@
+/* File : example.c */
+
+void add(int *x, int *y, int *result) {
+  *result = *x + *y;
+}
+
+void sub(int *x, int *y, int *result) {
+  *result = *x - *y;
+}
+
+int divide(int n, int d, int *r) {
+   int q;
+   q = n/d;
+   *r = n - q*d;
+   return q;
+}