/in/foo.cc: In function 'int main()':
/in/foo.cc:12:16: error: request for member 'begin' in 'a', which is of non-class type 'int [n]'
   12 |         sort(a.begin(),a.end());
      |                ^~~~~
/in/foo.cc:12:26: error: request for member 'end' in 'a', which is of non-class type 'int [n]'
   12 |         sort(a.begin(),a.end());
      |                          ^~~