foo.c: In function 'main':
foo.c:9:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    9 |     scanf("%d %d %d",&z.h,&z.m,&z.s);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.c:10:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   10 |     scanf("%d",&n);
      |     ^~~~~~~~~~~~~~

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