Sams Teach Yourself C++ in 21 Days

6. The following is one possible answer:
   SimpleCircle::SimpleCircle(const SimpleCircle & rhs)
   {
   int val = rhs.GetRadius();
   itsRadius = new int(val);
   }


7. The following is one possible answer:
   SimpleCircle& SimpleCircle::operator=(const SimpleCircle & rhs)
   {
   if (this == &rhs)
   return this;
   delete itsRadius;
   itsRadius = new int;
   itsRadius = rhs.GetRadius();
   return *this;
   }


8. The following is one possible answer:
   1: #include
   2: using namespace std;
   3:
   4: class SimpleCircle
   5: {
   6: public:
   7: // constructors
   8: SimpleCircle();
   9: SimpleCircle(int);
   10: SimpleCircle(const SimpleCircle &);
   11: ~SimpleCircle() {}
   12:
   13: // accessor functions
   14: void SetRadius(int);
   15: int GetRadius()const;
   16:
   17: // operators
   18: const SimpleCircle& operator++();
   19: const SimpleCircle operator++(int);
   20: SimpleCircle& operator=(const SimpleCircle &);
   21:
   22: private:
   23: int *itsRadius;
   24: };
   25:
   26:
   27: SimpleCircle::SimpleCircle()
   28: {itsRadius = new int(5);}
   29:
   30: SimpleCircle::SimpleCircle(int radius)
   31: {itsRadius = new int(radius);}

840 Appendix D

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