Main.c: In function ‘main’:
Main.c:8:11: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
    8 |  if(y%4==0&&y%100!=0||y%400==0)
      |     ~~~~~~^~~~~~~~~~
Main.c:13:10: warning: statement with no effect [-Wunused-value]
   13 |  if(m<13)2
      |          ^
Main.c:13:11: error: expected ‘;’ before ‘{’ token
   13 |  if(m<13)2
      |           ^
      |           ;
   14 |  {
      |  ~         
Main.c:4:6: warning: variable ‘months’ set but not used [-Wunused-but-set-variable]
    4 |  int months[12]={31,28,31,30,31,30,31,31,30,31,30,31};
      |      ^~~~~~