text: #include<iostream> 
  #include<cstring> 
  using namespace std; 
  
  class String 
  { 
  private: 
  	char *s; 
  	int size; 
  public: 
  	String(const char *str = NULL); // constructor 
  	~String() { delete [] s; }// destructor 
  	String(const String&); // copy constructor 
  	void print() { cout << s << endl; } // Function to print string 
  	void change(const char *); // Function to change 
  }; 
  
  String::String(const char *str) 
  { 
  	size = strlen(str); 
  	s = new char[size+1]; 
  	strcpy(s, str); 
  } 
  
  void String::change(const char *str) 
  { 
  	delete [] s; 
  	size = strlen(str); 
  	s = new char[size+1]; 
  	strcpy(s, str); 
  } 
  
  String::String(const String& old_str) 
  { 
  	size = old_str.size; 
  	s = new char[size+1]; 
  	strcpy(s, old_str.s); 
  } 
  
  int main() 
  { 
  	String str1("GeeksQuiz"); 
  	String str2 = str1; 
  
  	str1.print(); // what is printed ? 
  	str2.print(); 
  
  	str2.change("GeeksforGeeks"); 
  
  	str1.print(); // what is printed now ? 
  	str2.print(); 
  	return 0; 
  } 
  
  