3094: 下面哪段代码可以实现换行输出？
[Creator : ]
Description
A.cout << "hello" << end;
cout << "code";
B.cout << "hello" << endl;
cout << "code";
cout << "code";
cout << "code";
A.cout << "hello" << end;
cout << "code";
B.cout << "hello" << endl;
cout << "code";
cout << "code";
cout << "code";