foo.cc: In function ‘int main()’:
foo.cc:13:5: warning: this ‘while’ clause does not guard... [-Wmisleading-indentation]
   13 |     while (scanf("%d", a+(++n)) != EOF) ; --n;
      |     ^~~~~
foo.cc:13:43: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘while’
   13 |     while (scanf("%d", a+(++n)) != EOF) ; --n;
      |                                           ^~