Implement argument passing

example.elna

@@ -103,6 +103,22 @@ begin
     writei("Test not false")
 end;
 
+proc test_param(d: Int, e: Int);
+begin
+  writei("");
+  writei("Test param");
+  writei(d);
+  writei(e)
+end;
+
+proc test_const_char();
+const x = 'u';
+begin
+  writei("");
+  writei("Test constant character");
+  writei(x)
+end;
+
 begin
   test_primitive();
   test_string();
@@ -111,5 +127,7 @@ begin
   test_record();
   test_const();
   test_if();
-  test_not()
+  test_not();
+  test_param(8, 7);
+  test_const_char()
 end.