vc6.0没问题啊：
#include "stdafx.h"
#include
using namespace std;
class clock
{
public:
void settime(int Hour=0, int Minute=0, int Second=0);
void showtime()
{
cout< };
private:
int hour,minute,second;
};//There is a mistake here!
void clock::settime(int Hour, int Minute, int Second)
{
hour=Hour;
minute=Minute;
second=Second;
}
int main(void)
{
clock myclock;
myclock.settime();
myclock.showtime();
myclock.settime(8,1,2);
myclock.showtime();
return 0;
}