/in/foo.cc: In function 'void insert(int*, int, int)':
/in/foo.cc:21:14: warning: statement has no effect [-Wunused-value]
   21 |         for (i; i < n - 1; i++)//2 5 7 9 11,x=6->2 5 6 9 11 0,x=7 ->2 5 6 7 11 0,x=9 ->2 5 6 7 9 0,x=11 ->2 5 6 7 9 11,x=0
      |              ^
/in/foo.cc: In function 'int find_posi(int*, int, int)':
/in/foo.cc:15:1: warning: control reaches end of non-void function [-Wreturn-type]
   15 | }
      | ^