我在重载流插入运算符“<<”和重载流提取运算符“>>”遇到了6个错误，请各位老师指教，谢谢

C/C++ code

#include <iostream>      using namespace std;      class CTime      {      private:          unsigned short int hour;    // 时          unsigned short int minute;  // 分          unsigned short int second;  // 秒      public:          CTime(int h=0,int m=0,int s=0);          //重载流插入运算符“<<”    friend ostream& operator << (ostream&,CTime&);    //重载流提取运算符“>>”    friend istream& operator >> (istream&,CTime&);};CTime::CTime(int h,int m,int s)      {          hour=h;          minute=m;          second=s;      }      //比较运算符(二目)的重载         ostream& operator << (ostream&output,CTime&c){     output<<c.hour <<":"<<c.minute <<":"<<c.second <<endl;     return output;}   istream& operator >> (istream& input,CTime & c){     cout<<"请输入时间：（以aa bb cc的格式输入）";    input>>c.hour>>c.minute>>c.second;    return input;}void main()      {          CTime t1(8,20,25),t2(11,20,50),t;          int n;     cin>>t1>>t2;    cout<<"t1为：";          cout<<t1;          cout<<"t2为：";          cout<<t2;          system("PAUSE");      }        

[解决办法]
vc6.0吗?
如果是。 iostream 换为 iostream.h 同时去掉using namespace std;