Restrict a class object to be allocated only on the stack or only on the stack.

1. Set the class constructor attribute to private, and provide the static member function create to create a new object in the function. The implemented class can only be allocated on the stack.

Class base {

Protected: static base * single; base () {} public :~ Base () {} static base * Create () {single = new base (); Return single;} void destroy () {Delete this ;}}; base * B = base:: Create ();

2. Reload the new operator of the class to empty the function of the new operator after the reload. In this way, the outer program cannot allocate objects on the stack, but can only allocate objects on the stack.