/in/foo.c: In function 'main':
/in/foo.c:6:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
    6 |  scanf("%d",n);
      |         ~^  ~
      |          |  |
      |          |  int
      |          int *
/in/foo.c:6:2: warning: 'n' is used uninitialized [-Wuninitialized]
    6 |  scanf("%d",n);
      |  ^~~~~~~~~~~~~
/in/foo.c:5:6: note: 'n' was declared here
    5 |  int n;
      |      ^