foo.c: In function 'main':
foo.c:7:13: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'enum month *' [-Wformat=]
  scanf("%d-%d-%d", &year, &month, &day);
            ~^             ~~~~~~
foo.c:7:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d-%d-%d", &year, &month, &day);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.c:51:10: warning: 'result' may be used uninitialized in this function [-Wmaybe-uninitialized]
   result += 1;
   ~~~~~~~^~~~

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