string i delete lptr;j void printo cout<<ptr<<end; y p rivate char *ptr, void maino string pl(book); string p2("pen"); p1=p2 cout<< p2 p2. printo cout<<" pl pl printo;~string() { delete []ptr; } void print() { cout<<ptr<<endl; } private: char *ptr; }; void main() { string p1("book"); string p2("pen"); p1=p2; cout<<"p2:"; p2.print(); cout<<"p1:"; p1.print(); }