/in/foo.cc: In function 'int Isleap(int, int, int)':
/in/foo.cc:7:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
     if(( y%4 == 0) && (y%100 != 0)||(y%400 == 0))
        ~~~~~~~~~~~~^~~~~~~~~~~~~~~
/in/foo.cc: In function 'int All_day(int, int)':
/in/foo.cc:17:15: warning: the address of 'int Isleap(int, int, int)' will always evaluate as 'true' [-Waddress]
      if(Isleap)
               ^
/in/foo.cc: In function 'void Display_month(int, int)':
/in/foo.cc:64:15: warning: the address of 'int Isleap(int, int, int)' will always evaluate as 'true' [-Waddress]
      if(Isleap)
               ^