/in/foo.cc: In function 'int main()':
/in/foo.cc:39:18: error: 'Array::Array(int)' is private within this context
   39 |         Array a(n);
      |                  ^
/in/foo.cc:8:9: note: declared private here
    8 |         Array(int n){
      |         ^~~~~
/in/foo.cc:39:18: error: 'Array::~Array()' is private within this context
   39 |         Array a(n);
      |                  ^
/in/foo.cc:23:9: note: declared private here
   23 |         ~Array(){
      |         ^
/in/foo.cc:40:17: error: 'void Array::output()' is private within this context
   40 |         a.output();
      |         ~~~~~~~~^~
/in/foo.cc:17:14: note: declared private here
   17 |         void output(){
      |              ^~~~~~
/in/foo.cc:42:14: error: 'void Array::Del(int)' is private within this context
   42 |         a.Del(k);
      |         ~~~~~^~~
/in/foo.cc:26:14: note: declared private here
   26 |         void Del(int k){
      |              ^~~
/in/foo.cc:43:17: error: 'void Array::output()' is private within this context
   43 |         a.output();
      |         ~~~~~~~~^~
/in/foo.cc:17:14: note: declared private here
   17 |         void output(){
      |              ^~~~~~