// P8_08M.cpp
// member function definitions for p8_08.cpp
// operator + taken out for assignment
// class String
#include <iostream> 

using std::cout; 
using std::ostream;

#include <cstring>		// strcpy and strcat prototypes 

#include "p8_08.h"		// String class definition

// Conversion constructor: Convert a char * to String
String::String( const char * const zPtr )
{
   length = strlen( zPtr );			// compute length
   sPtr = new char[ length + 1 ];	// allocate storage
   assert( sPtr != 0 );		// terminate if memory not allocated
   strcpy( sPtr, zPtr );			// copy literal to object
} // end String conversion constructor

// Copy constructor
String::String( const String &copy )
{
   length = copy.length;			// copy length
   sPtr = new char[ length + 1 ];	// allocate storage
   assert( sPtr != 0 );				// ensure memory allocated
   strcpy( sPtr, copy.sPtr );		// copy string
} // end String copy constructor

// Destructor
String::~String() { delete [] sPtr; }  // reclaim string

// Overloaded = operator; avoids self assignment
const String &String::operator=( const String &right )
{
   if ( &right != this ) {			// avoid self assignment
      delete [] sPtr;				// prevents memory leak
      length = right.length;		// new String length
      sPtr = new char[ length + 1 ];// allocate memory
      assert( sPtr != 0 );			// ensure memory allocated
      strcpy( sPtr, right.sPtr );	// copy string
   }
   else
      cout << "Attempted assignment of a String to itself\n";

   return *this;   // enables concatenated assignments
} // end function operator=

// Concatenate right operand and this object and
// store in temp object.

// OVERLOADED + OPERATOR GOES HERE

 // end function operator+

// overloaded output operator
ostream & operator<<( ostream &output, const String &s )
{
   output << s.sPtr;
   return output;					// enables concatenation
} // end function operator<< 




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