/in/foo.cc: In function 'int main()':
/in/foo.cc:7:17: error: 'n' was not declared in this scope
  for(int i=1;i<=n;i++)
                 ^
/in/foo.cc:11:2: error: expected primary-expression before '}' token
  }
  ^
/in/foo.cc:12:10: error: expected ';' before string constant
   cout<<a" "<<b;
          ^~~