/in/foo.cc: In function 'int main()':
/in/foo.cc:13:22: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   case 2:if(year%4==0&&year%100!=0||year%400==0)
             ~~~~~~~~~^~~~~~~~~~~~~
/in/foo.cc:15:10: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
          else
          ^~~~
/in/foo.cc:17:12: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'else'
            break;
            ^~~~~