update

Task/Inheritance-Single/Seed7/inheritance-single.seed7

@@ -0,0 +1,21 @@
+$ include "seed7_05.s7i";
+
+const type: Animal is new struct
+    # ...
+  end struct;
+
+const type: Dog is sub Animal struct
+    # ...
+  end struct;
+
+const type: Lab is sub Dog struct
+    # ...
+  end struct;
+
+const type: Collie is sub Dog struct
+    # ...
+  end struct;
+
+const type: Cat is sub Animal struct
+    # ...
+  end struct;