/in/foo.cc:24:47: error: empty character constant
   24 |         cout<<y<<'      '<<m<<  <<d<<'  '<<h<<'';
      |                                               ^~
/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)mon[2]=29;
      |            ~~~~~~^~~~~~~~~~
/in/foo.cc:24:33: error: expected primary-expression before '<<' token
   24 |         cout<<y<<'      '<<m<<  <<d<<'  '<<h<<'';
      |                                 ^~