foo.c: In function 'main':
foo.c:18:18: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
   18 |          scanf("%d",a[i]);
      |                 ~^  ~~~~
      |                  |   |
      |                  |   int
      |                  int *
foo.c:18:10: warning: 'a' may be used uninitialized [-Wmaybe-uninitialized]
   18 |          scanf("%d",a[i]);
      |          ^~~~~~~~~~~~~~~~
foo.c:15:10: note: 'a' declared here
   15 | {int n=0,a[10000];
      |          ^

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