Calling a constructor to re-initialize object

Question

is it possible to re-initialize an object of a class using its constructor?

Answer 1

While most answers are reinitializing an object in two steps; first, creating an initial object, and second creating another object and swapping it with the first one using placement new, this answer covers the case that you first create a pointer to an empty object and later allocate and construct it:

class c *c_instance; // Pointer to class c
c_instance = new c(arg1, ..., argn) // Allocate memory & call the proper constructor 
// Use the instance e.g. c->data
delete c_instance; // Deallocate memory & call the destructor