哪错了？？？？

[qishumin1014464191]

#include<iostream>
using namespace std;
class Clock{
public:
Clock(int newH,int newM,int newS);
void setTime(int newH=0,int newM=0,int newS=0);
void showTime();
private:
int hour,minute,second;
};
Clock::Clock(int newH,int newM,int newS){
hour=newH;
minute=newM;
second=newS;
}
void Clock::setTime(int newH,int newM,int newS){
hour=newH;
minute=newM;
second=newS;
}
inline void Clock::showTime(){
cout<<hour<<":"<<minute<<":"<<second<<endl;
}
int main(){
Clock myClock;
cout<<"first time set and output"<<endl;
myClock.setTime();
myClock.showTime();
cout<<"second time set and output"<<endl;
myClock.setTime(8,0,0);
myClock.showTime();
return 0;
}

[pengzhixi]

Clock myClock;
这里是需要你提供默认构造函数的，而你没有。

[lengxujun]

学习断点调试和插桩调试.

[無_1024]

#include<iostream>
using namespace std;
class Clock{
public:
	Clock(int newH = 0,int newM = 0,int newS = 0);//缺少一个默认构造函数
	void setTime(int newH=0,int newM=0,int newS=0);
	void showTime();
private:
	int hour,minute,second;
};
Clock::Clock(int newH,int newM,int newS){
	hour=newH;
	minute=newM;
	second=newS;
}
void Clock::setTime(int newH,int newM,int newS){
	hour=newH;
	minute=newM;
	second=newS;
}
inline void Clock::showTime(){
	cout<<hour<<":"<<minute<<":"<<second<<endl;
}
int main(){
	Clock myClock;
	cout<<"first time set and output"<<endl;
	myClock.setTime();
	myClock.showTime();
	cout<<"second time set and output"<<endl;
	myClock.setTime(8,0,0);
	myClock.showTime();
	return 0;
}

[qishumin1014464191]

怎样改呢？？？
[Quote=引用 3 楼 hnuqinhuan 的回复:]
C/C++ code

#include<iostream>
using namespace std;
class Clock{
public:
Clock(int newH = 0,int newM = 0,int newS = 0);//缺少一个默认构造函数
void setTime(int newH=0,int newM=0,int newS=0);
……
[/Quote]

[qishumin1014464191]

知道了！！[Quote=引用 3 楼 hnuqinhuan 的回复:]
C/C++ code

#include<iostream>
using namespace std;
class Clock{
public:
Clock(int newH = 0,int newM = 0,int newS = 0);//缺少一个默认构造函数
void setTime(int newH=0,int newM=0,int newS=0);
……
[/Quote]