/in/foo.cc: In function 'int main()':
/in/foo.cc:22:4: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
  if(month<13&&month>0)
    ^
/in/foo.cc:30:8: warning: 'day' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<day<<endl;
        ^~~