/in/foo.cc: In function 'int main()':
/in/foo.cc:29:13: warning: 'n' is used uninitialized [-Wuninitialized]
   29 |     while (n--) {
      |            ~^~
/in/foo.cc:24:9: note: 'n' was declared here
   24 |     int n;
      |         ^