Question

定义一个时间类Time，包含3个保护数据成员Hour（小时），Minute（分钟），second(秒)以及两个公有成员函数

定义一个时间类Time，包含3个保护数据成员Hour（小时），Minute（分钟），second(秒)以及两个公有成员函数SetTime()用来为对象设置时间，ShowTime()用来输出显示时间。
定义该类的构造函数，初始化对象的Hour，Minute和Second；
主函数中定义两个对象，时间分别为15点38分42秒和3点4分5秒，并且输出。

Answer 1

#include <iostream>
using namespace std;
class Time
{
protected:
int Hour;
int Minute;
int second;
public:
Time();
void SetTime(int Hour,int Minute,int second);
void ShowTime();
};
Time::Time()
{
Hour = 0;
Minute = 0;
second = 0;
}

void Time::SetTime(int Hour,int Minute,int second)
{
this->Hour = Hour;
this->Minute = Minute;
this->second = second;
}

void Time::ShowTime()
{
cout<<Hour<<":"<<Minute<<":"<<second<<endl;
}
int main()
{
Time T1,T2;
T1.SetTime(15,38,42);
T2.SetTime(3,4,5);
T1.ShowTime();
T2.ShowTime();
return 0;
}

Answer 2

#include<iostream>
using namespace std;
class Time
{
public:
Time(int h=0,int m=0,int s=0);
void SetTime(int h1,int m1,int s1);
void ShowTime();
private:
int Hour;
int Minute;
int Second;

};
int main()
{
Time t1,t2;

t1.SetTime(15,38,42);
t2.SetTime(3,4,5);
t1.ShowTime();
t2.ShowTime();
return 0;
}
Time::Time(int h,int m,int s):Hour(h),Minute(m),Second(s){}

void Time::SetTime(int h1,int m1,int s1)
{
Hour=h1;
Minute=m1;
Second=s1;
}
void Time::ShowTime()
{
cout<<Hour<<":"<<Minute<<":"<<Second<<endl;
}

Answer 3

#include <iostream>
using namespace std;

class Time
{
protected:
int Hour;
int Minute;
int second;

public:
Time(){Hour=0;Minute=0;second=0;}
void SetTime(int a,int b,int c){Hour=a;Minute=b;second=c;}
void ShowTime(){cout<<Hour<<":"<< Minute<<":"<<second<<endl;}
};

int main()
{
Time t1,t2;
t1.SetTime(15,38,42);
t2.SetTime(3,4,5);
t1.ShowTime();
t2.ShowTime();

return 0;
}

Answer 4

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