/in/foo.cc: In function 'int main()':
/in/foo.cc:15:17: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'int' [-Wformat=]
   15 |         scanf("%d", x);
      |                ~^   ~
      |                 |   |
      |                 |   int
      |                 int*
/in/foo.cc:15:14: warning: 'x' is used uninitialized [-Wuninitialized]
   15 |         scanf("%d", x);
      |         ~~~~~^~~~~~~~~
/in/foo.cc:14:13: note: 'x' was declared here
   14 |         int x;
      |             ^