CS 340 - 2/11/12

create a class MyString

Dynamic Array Class

=============================
// file MyString.h
#include <cstring>

class MyString
{
  private:
     char *str_;
     int  length_;
     MyString (int);

  public:
     MyString ();
     MyString (char);
     MyString (const char *);

     MyString (const MyString&);   // the big three
     ~MyString ();                 // the big three
     MyString& operator= (const MyString&); // the big 3

     int getLength();
     char&  operator[] (int);
     char   operator[] (int) const;
     MyString operator+ (const MyString&) const;
};

inline int MyString::getLength()
   {
     return length_;
   }

====================================
// file: MyString.cpp
#include "MyString.h"

MyString::MyString ()
  : length_ (0), str_ (new char [1])
{
  str_[0] = '\0';
}

MyString::MyString (char ch)
   : length_ (1), str_ (new char [2])
{
  str_[0] = ch;
  str_[1] = '\0';
}

MyString::MyString (const char* word)
  :  str_ (new char [strlen(word) + 1]),
     length_ (strlen(word))
{
  strcpy (str_, word);
}

MyString::~MyString()
{
  delete [] str_;
}