foo.c: In function 'Insert':
foo.c:16:1: warning: control reaches end of non-void function [-Wreturn-type]
   16 | }
      | ^
foo.c: In function 'main':
foo.c:21:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   21 |  scanf("%d",&n);
      |  ^~~~~~~~~~~~~~
foo.c:24:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   24 |   scanf("%d",&a[i]);
      |   ^~~~~~~~~~~~~~~~~
foo.c:26:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   26 |  scanf("%d",&x);
      |  ^~~~~~~~~~~~~~
foo.c: In function 'Insert':
foo.c:4:8: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
    4 |  int i,k;
      |        ^

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