/in/foo.cc:2:1: error: 'cout' does not name a type
 cout<<"年份:"<<endl; 
 ^~~~
/in/foo.cc:3:1: error: 'cin' does not name a type
 cin>>year;
 ^~~
/in/foo.cc:4:1: error: 'cout' does not name a type
 cout<<"月份:"<<endl;
 ^~~~
/in/foo.cc:5:1: error: 'cin' does not name a type
 cin>>month;
 ^~~
/in/foo.cc:6:1: error: expected unqualified-id before 'if'
 if((year%4==0&&year%100!=0)||year%400==0)//闰年 
 ^~
/in/foo.cc:15:1: error: expected unqualified-id before 'else'
 else//平年 
 ^~~~
/in/foo.cc:24:1: error: 'cout' does not name a type
 cout<<"天数为:"<<days<<endl;
 ^~~~
/in/foo.cc:25:1: error: expected unqualified-id before 'return'
 return 0;
 ^~~~~~
/in/foo.cc:26:1: error: expected declaration before '}' token
 }
 ^