foo.cc: In function 'int isLeapYear(int)':
foo.cc:5:18: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    5 |  return year%4==0&&year%100!=0||year%400==0;
      |         ~~~~~~~~~^~~~~~~~~~~~~
foo.cc: In function 'int passDays(int, int, int)':
foo.cc:31:15: warning: unused variable 's' [-Wunused-variable]
   31 |  int m,days=0,s;
      |               ^
foo.cc: In function 'int daysOfYear(int)':
foo.cc:40:14: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   40 |  if(year%4==0&&year%100!=0||year%400==0)
      |     ~~~~~~~~~^~~~~~~~~~~~~

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