/in/foo.cc: In function 'int Fib(int)':
/in/foo.cc:12:20: error: 'fib' cannot be used as a function
  fib[n] = fib(n - 1) + fib(n - 2);
                    ^
/in/foo.cc:12:33: error: 'fib' cannot be used as a function
  fib[n] = fib(n - 1) + fib(n - 2);
                                 ^