text: #include <iostream>
  #include <cstring>
  
  int main()
  {
      using namespace std;
      char first_name[20];
      char last_name[20];
      char full_name[40];
  
      cout << "Enter your first name: \n";
      cin.getline(first_name, 20);
      cout << "Enter your last name: \n";
      cin.getline(last_name, 20);
      strcpy(full_name, last_name);
      strcat(full_name, ", ");
      strcat(full_name, first_name);
      cout << "Here's the information in a single string: " << full_name << endl;
  }