CSC134 OOP in C++ - Classes Homework II

Homework: Classes II

Consider the following nonsense class:

   class A
   {
   public:
      A();
      A(int A);
      void f();
      void g();
      int h();
      void k();
   private:
     int n;
   };
   A::A()
   {
     n = 0;
   }
   A::A(int a)
   {
     n = a;
   }
   void A::f()
   {
     n++;
   }
   void A::g()
   {
      f();
      n = 2 * n;
      f();
   }
   int A::h()
   {
      return n;
   }
   void A::k()
   {
      cout << n << endl;
   }

Determine what the following program prints, using the nonsense class. Work through this problem by hand, don’t type it in and run it on the computer.

   int main()
   {
      A x,z;
      A y(2);
      A d = A(3);
      z = y;
      x.f();
      y.g();
      z.f();
      d.g();
      d.k();
      A e(x.h() + y.h() + z.h());
      e.k();
      return 0;
   }

State which constructor is called during the declaration of each A object in the program shown in the previous problem.
Add a member function int e(A) that returns true if the parameter contains the same value for n as the invoking object, and returns false otherwise.
Write the definition for a class B which has two data members: val (a float) and myA (an A object), and member functions:
1. default constructor (sets val to 1)
2. void p(), which multiplies val by 10 and increments data member n of the data member myA in the invoking object
3. void q(float), which divides val by its parameter
4. void pr(), which prints the data members of the invoking object
Write a main function which declares two B objects called bOne and bTwo, and an A object called aOne. This function should
1. set the data member of aOne to 9
2. set the myA data member of bOne to contain 3, and the val data member of bOne to 10
3. print all three objects