/in/foo.cc: In function 'int main()':
/in/foo.cc:6:2: error: 'cout' was not declared in this scope
  cout<<"输入年份:";
  ^~~~
/in/foo.cc:7:2: error: 'cin' was not declared in this scope
  cin>>year;
  ^~~
/in/foo.cc:8:23: error: expected primary-expression before '!=' token
  if(year%4==0 && year%!=0 || year%400==0)
                       ^~
/in/foo.cc:9:22: error: 'endl' was not declared in this scope
   cout<<year<<"yes"<<endl;
                      ^~~~
/in/foo.cc:11:21: error: 'endl' was not declared in this scope
   cout<<year<<"no"<<endl;
                     ^~~~