Main.cc: In function ‘int main()’:
Main.cc:8:5: error: ‘cout’ was not declared in this scope
cout << "Nhap so nguyen duong n: ";
^~~~
Main.cc:8:5: note: suggested alternative: ‘cosl’
cout << "Nhap so nguyen duong n: ";
^~~~
cosl
Main.cc:9:5: error: ‘cin’ was not declared in this scope
cin >> n;
^~~
Main.cc:9:5: note: suggested alternative: ‘sin’
cin >> n;
^~~
sin
Main.cc:19:5: error: expected primary-expression before ‘return’
return 0;
^~~~~~