运行 ID: 71185

Main.cc: In function ‘int main()’:
Main.cc:5:5: error: ‘cin’ was not declared in this scope
     cin >> a >> b >> c;
     ^~~
Main.cc:5:5: note: suggested alternative: ‘main’
     cin >> a >> b >> c;
     ^~~
     main
Main.cc:6:5: error: ‘cout’ was not declared in this scope
     cout << setw(7) << a << " "
     ^~~~
Main.cc:8:29: error: ‘endl’ was not declared in this scope
          << setw(7) << c << endl;
                             ^~~~
Main.cc:8:29: note: suggested alternative: ‘enum’
          << setw(7) << c << endl;
                             ^~~~
                             enum