foo.c: In function 'main':
foo.c:23:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   if(x==n)
   ^~
foo.c:25:4: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
    break;
    ^~~~~
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ^~~~~~~~~~~~~~
foo.c:9:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a[i]);
   ^~~~~~~~~~~~~~~~~
foo.c:16:2: warning: 'min' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(j=2;j<=min/2;j++)
  ^~~

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