foo.c: In function 'main':
foo.c:13:8: warning: implicit declaration of function 'abs' [-Wimplicit-function-declaration]
   13 |   min+=abs(a[i]-a[0]);
      |        ^~~
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    6 |  scanf("%d",&n);
      |  ^~~~~~~~~~~~~~
foo.c:9:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    9 |   scanf("%d",&a[i]);
      |   ^~~~~~~~~~~~~~~~~

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