foo.c: In function 'Insert':
foo.c:10:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   10 |         for (i = 0; i < n; i++)
      |         ^~~
foo.c:15:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   15 |                 for (i = n - 1; i >= j; i--)
      |                 ^~~
foo.c:17:18: warning: 'j' may be used uninitialized [-Wmaybe-uninitialized]
   17 |                 a[j] = x;
      |                  ^
foo.c:9:15: note: 'j' was declared here
    9 |         int i,j;
      |               ^

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