foo.cc: In function 'int Daybefore(date*)':
foo.cc:24:35: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   24 |             case 2:if(q->year%4==0&&q->year%100!=0||q->year%400==0)
      |                       ~~~~~~~~~~~~^~~~~~~~~~~~~~~~
foo.cc:11:11: warning: unused variable 'answer' [-Wunused-variable]
   11 |     int l,answer=0;
      |           ^~~~~~
foo.cc: In function 'int Dayafter(date*)':
foo.cc:49:35: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   49 |             case 2:if(p->year%4==0&&p->year%100!=0||p->year%400==0)
      |                       ~~~~~~~~~~~~^~~~~~~~~~~~~~~~
foo.cc: In function 'int Midday(int)':
foo.cc:61:14: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   61 |     if(d%4==0&&d%100!=0||d%400==0)
      |        ~~~~~~^~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:73:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   73 |         scanf("%d%d%d",&p2.year,&p2.month,&p2.day);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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