the program itself will not indicate to the user whether it's working or not.
the program simply declares a variable, then exits. any compiler errors?
using namespace std;
cout << "Enter your first name: ";
cin >> first_name;
cout << "\n\nEnter your last name: ";
cin >> last_name;
cout << "\n\nYour full name is: " << first_name << " " << last_name;
cout << "\n\nYour initials are: " << first_name << ". " << last_name << ".";