foo.c: In function 'main':
foo.c:14:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   14 |  for(k=0;k<mon;k++)
      |  ^~~
foo.c:16:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   16 |   sum+=day;
      |   ^~~
foo.c:11:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   11 |  scanf("%d%d%d",&year,&mon,&day);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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