Main.cc:4:1: error: expected initializer before 'int'
int a, b;
^
Main.cc:5:1: error: 'cin' does not name a type
cin >> a >> b;
^
Main.cc:6:1: error: 'cout' does not name a type
cout << a + b << endl;
^
Main.cc:7:1: error: expected unqualified-id before '{' token
{
^