I like this simple class

codingTests/cplusplus/simpleClass.cpp

@@ -0,0 +1,26 @@
+// example: class constructor
+#include <iostream>
+using namespace std;
+
+class Rectangle {
+    int width, height;
+  public:
+    Rectangle (int,int);
+    int area () {return (width*height);}
+    ~Rectangle ();
+};
+
+Rectangle::Rectangle (int a, int b) {
+  width = a;
+  height = b;
+}
+
+Rectangle::~Rectangle() {}
+
+int main () {
+  Rectangle rect (3,4);
+  Rectangle rectb (5,6);
+  cout << "rect area: " << rect.area() << endl;
+  cout << "rectb area: " << rectb.area() << endl;
+  return 0;
+}