弱弱的问一下

应该是这样：
#include <iostream>
#include <atlstr.h>
using std::cout;
using std::endl;

class Time
{
public:
    void settime(int h, int m, int s);
    void printtime();
    int hour;
    int minute;
    int second;
};

void Time::settime(int h, int m, int s)
{
    hour = h;
    minute = m;
    second = s;
    /*hour = 9;
    minute = 20;
    second = 30;*/
}

int main()
{
    Time t1;
    t1.settime(9,20,30);
    CString str;
    str.Format("%d:%d:%d",t1.hour,t1.minute,t1.second);
    t1.settime(9, 20 ,30);
    cout<<"t1="<<str<<endl;
    return 0;
}