The Code has several errors


ugtweak.c:12:11: error: result of comparison against a string literal is
      unspecified (use strncmp instead) [-Werror,-Wstring-compare]
    if (s == "Alice" || "Bob") 
          ^  ~~~~~~~
ugtweak.c:26:93: error: use of undeclared identifier 's'
  ...to see you again, %s, you are looking so elegant this evening.\n", s);
                                                                        ^
2 errors generated.