update

basic_content/virtual/set3/copy_consrtuct.cpp

@@ -0,0 +1,41 @@
+#include <iostream> 
+using namespace std; 
+
+class Base 
+{ 
+    public: 
+
+}; 
+
+class Derived : public Base 
+{ 
+    public: 
+        Derived() 
+        { 
+            cout << "Derived created" << endl; 
+        } 
+
+        Derived(const Derived &rhs) 
+        { 
+            cout << "Derived created by deep copy" << endl; 
+        } 
+
+        ~Derived() 
+        { 
+            cout << "Derived destroyed" << endl; 
+        } 
+}; 
+
+int main() 
+{ 
+    Derived s1; 
+
+    Derived s2 = s1; // Compiler invokes "copy constructor" 
+    // Type of s1 and s2 are concrete to compiler 
+
+    // How can we create Derived1 or Derived2 object 
+    // from pointer (reference) to Base class pointing Derived object? 
+
+    return 0; 
+} 
+