Merge pull request #2661 from corob-msft/cr-1764

PRMerger20 · web-flow · commit 83cea86de56f · 2020-02-03T02:56:03.000-08:00
Fix example in dynamic_cast for 1764
diff --git a/docs/cpp/dynamic-cast-operator.md b/docs/cpp/dynamic-cast-operator.md
@@ -1,6 +1,7 @@
 ---
 title: "dynamic_cast Operator"
-ms.date: "11/19/2018"
+description: "Overview of the C++ language dynamic_cast operator."
+ms.date: "02/03/2020"
 f1_keywords: ["dynamic_cast_cpp"]
 helpviewer_keywords: ["dynamic_cast keyword [C++]"]
 ms.assetid: f380ada8-6a18-4547-93c9-63407f19856b
@@ -122,11 +123,13 @@ A pointer to an object of type `D` can be safely cast to `B` or `C`. However, if
 // dynamic_cast_4.cpp
 // compile with: /c /GR
 class A {virtual void f();};
-class B {virtual void f();};
-class D : public B {virtual void f();};
+class B : public A {virtual void f();};
+class C : public A {virtual void f();};
+class D : public B, public C {virtual void f();};
 
 void f() {
    D* pd = new D;
+   A* pa = dynamic_cast<A*>(pd);   // C4540, ambiguous cast fails at runtime
    B* pb = dynamic_cast<B*>(pd);   // first cast to B
    A* pa2 = dynamic_cast<A*>(pb);   // ok: unambiguous
 }
