Consider the following class definition: //username.h #include lt;iostreamgt; #include lt;stringgt; class username { public: void getName();...

1.

Consider the following class definition:

//username.h

#include <iostream>

#include <string>

class username 

{

  public:

     void getName();           

     void display_usernames();

  private:

     std::string first;

     std::string last;

};            

Which functions can carry out an assignment