Sams Teach Yourself C++ in 21 Days

Answers 857

D

2. The following is one possible answer:
   class boundedArray : public Array
   {
   //...
   }


3. The following is one possible answer:
   class Set : private Array
   {
   // ...
   }


4. The following is one possible answer:
   0: #include <iostream.h>
   1: #include <string.h>
   2:
   3: class String
   4: {
   5: public:
   6: // constructors
   7: String();
   8: String(const char const);
   9: String(const String &);
   10: ~String();
   11:
   12: // overloaded operators
   13: char & operator[](int offset);
   14: char operator[](int offset) const;
   15: String operator+(const String&);
   16: void operator+=(const String&);
   17: String & operator= (const String &);
   18: friend ostream& operator<<( ostream&
   19: theStream,String& theString);
   20: friend istream& operator>>( istream&
   21: theStream,String& theString);
   22: // General accessors
   23: int GetLen()const { return itsLen; }
   24: const char GetString() const { return itsString; }
   25: // static int ConstructorCount;
   26:
   27: private:
   28: String (int); // private constructor
   29: char * itsString;
   30: unsigned short itsLen;
   31:
   32: };
   33:
   34: ostream& operator<<( ostream& theStream,String& theString)
   35: {
   36: theStream << theString.GetString();

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