more continious examples

exercises/05/vslc/vsl_programs/ps3-simplify/function_call.vsl

@@ -0,0 +1,9 @@
+func add(a, b) begin
+    return a + b
+end
+
+func main() 
+begin
+    print add(40, 2)
+    return 0
+end

exercises/05/vslc/vsl_programs/ps3-simplify/globals.vsl

@@ -0,0 +1,12 @@
+var global_var0, global_var1
+
+func my_func(param0, param1) begin
+    var a
+    return 0
+end
+
+func main() begin
+    var a
+    print "a string"
+    return 0
+end

exercises/05/vslc/vsl_programs/ps3-simplify/shadow.vsl

@@ -0,0 +1,28 @@
+// Checking symbol shadowing
+
+var a
+
+func shadow() begin
+    var a, b
+    a := 1
+    begin
+        var a
+        a := 2
+        b := 40
+        begin
+            var a
+            a := b + 2
+            print a, b
+        end
+        print a
+        begin
+            var b
+            b := 38
+            a := b + 3
+            print a, b
+        end
+        print a
+    end
+    print b
+    return 0
+end