运行 ID: 51574

Main.cc: In function ‘int main()’:
Main.cc:5:37: error: ‘setprecision12’ is not a member of ‘std’
     std::cout << std::fixed << std::setprecision12) << n;
                                     ^~~~~~~~~~~~~~
Main.cc:5:37: note: suggested alternative: ‘setprecision’
     std::cout << std::fixed << std::setprecision12) << n;
                                     ^~~~~~~~~~~~~~
                                     setprecision