Mã chấm: 14238

Main.cc:1:1: error: ‘include’ does not name a type; did you mean ‘__has_include’?
 include
 ^~~~~~~
 __has_include
Main.cc: In function ‘int main()’:
Main.cc:6:5: error: ‘cin’ was not declared in this scope
     cin >> a >> b >> c >> x;
     ^~~
Main.cc:6:5: note: suggested alternative: ‘main’
     cin >> a >> b >> c >> x;
     ^~~
     main
Main.cc:7:5: error: ‘cout’ was not declared in this scope
     cout << a * (x*x) + b * x + c;
     ^~~~