Updates to lecture 11

Grzegorz Jabłoński
1 parent 1b0b1f67
Showing 3 changed files with 8 additions and 4 deletions
examples11/02-funptr/funptr2.cpp
slides-english/oopc-11.pdf
slides-polish/po-11.pdf
@@ -3,10 +3,13 @@ using namespace std;
  
 class X
 {
+protected:
+  int val;
 public:
+  X(int v) : val(v) {};
   virtual void f (double a)
   {
-    cout << "X::f with parameter "<<a<<endl;
+    cout << a + val <<endl;
   }
   virtual ~X(){};
 };
@@ -15,9 +18,10 @@ public:
 class Y: public X
 {
 public:
+  Y(int v) : X(v) {};
   void f (double a)
   {
-    cout << "Y::f with parameter "<<a<<endl;
+    cout << 2 * a + val <<endl;
   }
 };
  
@@ -34,7 +38,7 @@ test (X * p, X * q)
 int
 main ()
 {
-  X i;
-  Y j;
+  X i(3);
+  Y j(4);
   test (&i, &j);
 }