//String.cc
#include "String.hh"

String operator+( const String& lhs, const String& rhs ) {
	String result(lhs); // Copy lhs into res with constructor
	result += rhs ; // Use operator+= function which is a member of the class
	return result ;
}

String& String::operator=( const String& a ) {
		if ( &a != this ) {
			insert(a._s) ;
		}

		return *this ;
}
String& String::operator+=( const String& a ) {
	  int newlen = _len + a._len ;
	  char * newstr = new char[ newlen+1 ] ;

	  strcpy(newstr, _s) ;
	  strcpy(newstr + _len, a._s) ;

	  if (_s) delete[] _s ;
	  
	  _s = newstr ;
	  _len = newlen ;

	  return *this ;
}