运行 ID: 76816

Main.cc: In function ‘long long int fibonacci(int)’:
Main.cc:14:13: error: a function-definition is not allowed here before ‘{’ token
  int main() {
             ^
Main.cc:20:2: error: expected ‘}’ at end of input
  }
  ^
Main.cc:20:2: warning: control reaches end of non-void function [-Wreturn-type]
  }
  ^