/in/foo.cc: In function 'int main()':
/in/foo.cc:7:18: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    7 |         if(y%4==0&&y%100!=0||y%400==0);
      |            ~~~~~~^~~~~~~~~~
/in/foo.cc:7:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    7 |         if(y%4==0&&y%100!=0||y%400==0);
      |         ^~
/in/foo.cc:8:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
    8 |                 days[2]=29;
      |                 ^~~~