Merge pull request Astrodevil#398 from gaonkarsahil/virtual-function-cpp

Program to implement virtual function.

Author: Astrodevil

C++/virtualFunction.cpp

@@ -0,0 +1,45 @@
+// Program to implement virtual function.
+
+#include <iostream>
+
+using namespace std;
+
+class Base {
+    public:
+        void display() {
+            cout<< "Display Base function.\n";
+        }
+        
+        virtual void show() {
+            cout<< "Show Base function.\n\n";
+        }
+};
+
+class Derived: public Base {
+    public: 
+        void display() {
+            cout<< "Display Base function.\n";
+        }
+        
+        void show() {
+            cout<< "Show Base function.\n";
+        }
+};
+
+int main() {
+    Base B;
+    Derived D;
+    Base *bptr;
+    
+    cout<<"bptr points to Base\n";
+    bptr = &B;
+    bptr->display();
+    bptr->show();
+    
+    cout<<"bptr points to Derived\n";
+    bptr = &D;
+    bptr->display();
+    bptr->show();
+  
+  return 0;
+}