#include <iostream>
#include <new>
using namespace std;
// dynamic allocation with pointer 
//string_new_delete1.cpp
int main()
{
	string str1; string *strPtr1; string *p1; 
	cout<<"\n Enter a string : "; 
	 getline(cin,str1); 
 if(str1.length()>15)
	 { cout<<"\n You Entered "<<str1.length();
	 cout<<" long \n Bye" ; return 0; }
//strPtr1 = &str1;//allowed, passing reference of a string
   try{
	  // passing string value to a pointer 
	  // creates a bug strPtr1=new string(*p1);
	 // strPtr1=new string(str1); // will complie
	 strPtr1 = new string;// two line codes
	 *strPtr1 = str1;// passing value only
	 cout<<"\n allocated ";
	  }
	catch(bad_alloc errr)
	 {  cout<<"n allocation error"; return 1; }
	 cout<<"\n "<< *strPtr1  << " @ " << &strPtr1;
	  *strPtr1 += " Welcome "; 
	  p1 = strPtr1; 
	  *p1 += "Gforce"; 
	  cout<<"\n *strPtr1 : "<< *strPtr1; 
	  cout<<"\n *p1 : "<< *p1;  
	  delete strPtr1; 
	  // delete p1; // error, can't delete a deleted object
	  cout<<"\n "<< str1; 
    return 0;
}