第九周实验报告2（Time类中的<<和>>运算符的重载）

#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);
void setTime(int h,int m,int s);
friend istream&operator >>(istream&input,CTime &);
friend ostream&operator <<(ostream&output,CTime &);
bool operator > (CTime &t);
bool operator < (CTime &t);
bool operator >= (CTime &t);
bool operator <= (CTime &t);
bool operator == (CTime &t);
bool operator != (CTime &t);
//二目运算符的重载
CTime operator+(CTime &c);//返回c所规定的时、分、秒后的时间，例t1(8,20,25),t2(11,20,50)，t1+t2为:41:15
CTime operator-(CTime &c);//对照+理解
CTime operator+(int s);//返回s秒后的时间
CTime operator-(int s);//返回s秒前的时间
//一目运算符的重载
CTime operator++(int);//后置++，下一秒
CTime operator++();//前置++，下一秒
CTime operator--(int);//后置--，前一秒
CTime operator--();//前置--，前一秒
//赋值运算符的重载
CTime operator+=(CTime &c);
CTime operator-=(CTime &c);
CTime operator+=(int s);//返回s秒后的时间
CTime operator-=(int s);//返回s秒前的时间
};
CTime::CTime(int h,int m,int s)
{
hour = h;

minute = m;

second = s;
}
void CTime::setTime(int h,int m,int s)
{
hour = h;

minute = m;

second = s;
}

istream&operator >>(istream&input,CTime &c)
{
input>> c.hour >> c.minute >> c.second ;
return input;
}

ostream&operator <<(ostream&output,CTime &c)
{
output << "(" << c.hour << ":" << c.minute << ":" << c.second <<")";
return output;
}
bool CTime::operator > (CTime &t)
{
if(hour > t.hour)  return true;

if(minute > t.minute) return true;

if(second > t.second) return true;

return false;
}
bool CTime::operator < (CTime &t)
{
if(hour < t.hour)  return true;

if(minute < t.minute) return true;

if(second < t.second) return true;

return false;

}
bool CTime::operator >= (CTime &t)
{
if(hour < t.hour)  return false;

if(minute < t.minute) return false;

if(second < t.second) return false;

return true;

}
bool CTime::operator <= (CTime &t)
{
if(hour > t.hour)  return false;

if(minute > t.minute) return false;

if(second > t.second) return false;

return true;
}
bool CTime::operator == (CTime &t)
{
return(hour==t.hour?true:false && minute==t.minute?true:false &&second==t.second?true:false);
}
bool CTime::operator != (CTime &t)
{
return(hour!=t.hour?true:false || minute!=t.minute?true:false ||second!=t.second?true:false);
}
CTime CTime::operator+(CTime &c)//返回c所规定的时、分、秒后的时间，例t1(8,20,25),t2(11,20,50)，t1+t2为:41:15
{
int s1, s2, s;

s1 = hour *3600 + minute * 60 + second;

s2 = c.hour*3600 + c.minute *60 + c.second;

s = s1 + s2;

return CTime(s/3600, (s%3600)/60, (s%3600)%60);
}
CTime CTime::operator-(CTime &c)//对照+理解
{
int s1, s2, s;

s1 = hour *3600 + minute * 60 + second;

s2 = c.hour*3600 + c.minute *60 + c.second;

s = s1 - s2;

if(s < 0)
{
s += 24*3600;
}
return CTime(s/3600, (s%3600)/60, (s%3600)%60);
}
CTime CTime::operator+(int s)//返回s秒后的时间
{
int s1, s2;

s1 = hour *3600 + minute * 60 + second;

s2 = s1 + s;

return CTime(s2/3600, (s2%3600)/60, (s2%3600)%60);
}
CTime CTime::operator-(int s)//返回s秒前的时间
{
int s1, s2;

s1 = hour *3600 + minute * 60 + second;

s2 = s1 - s;

if(s2 < 0)
{
s += 24*3600;
}
return CTime(s2/3600, (s2%3600)/60, (s2%3600)%60);
}
CTime CTime::operator++(int)//后置++，下一秒
{
CTime temp(*this);

second++;

if(second >= 60)
{
second = 0;

++minute;
}
return temp;
}
CTime CTime::operator++()//前置++，下一秒
{
if(++second >= 60)
{
second = 0;

++minute;
}
return *this;
}

CTime CTime::operator--(int)//后置--，前一秒
{
CTime temp(*this);

second--;

if(second <= 60)
{
second = 60;

--minute;
}
return temp;
}
CTime CTime::operator--()//前置--，前一秒
{
if(--second <= 0)
{
second = 60;

--minute;
}
return *this;
}
CTime CTime::operator+=(CTime &c)
{
int s1, s2, s;

s1 = hour *3600 + minute * 60 + second;

s2 = c.hour*3600 + c.minute *60 + c.second;

s = s1 + s2;

hour = s/3600;

minute = (s%3600)/60;

second = (s%3600)%60;

return (hour, minute, second);
}
CTime CTime::operator-=(CTime &c)
{
int s1, s2, s;

s1 = hour *3600 + minute * 60 + second;

s2 = c.hour*3600 + c.minute *60 + c.second;

s = s1 - s2;

if(s < 0)
{
s += 24*3600;
}
hour = s/3600;

minute = (s%3600)/60;

second = (s%3600)%60;

return (hour, minute, second);
}
CTime CTime::operator+=(int s)//返回s秒后的时间
{
int s1, s2;

s1 = hour *3600 + minute * 60 + second;

s2 = s1 + s;

hour = s2/3600;

minute = (s2%3600)/60;

second = (s2%3600)%60;

return (hour, minute, second);
}
CTime CTime::operator-=(int s)//返回s秒前的时间
{
int s1, s2;

s1 = hour *3600 + minute * 60 + second;

s2 = s1 - s;

if(s2 < 0)
{
s2 += 24*3600;
}
hour = s2/3600;

minute = (s2%3600)/60;

second = (s2%3600)%60;

return (hour, minute, second);
}
void main()
{
CTime t1,t2,t;
cout<<"输入时间，格式（xx xx xx)"<<endl;
cin >> t1;
cout<<"t1为："<<t1<<endl;
cout<<"输入时间，格式（xx xx xx)"<<endl;
cin>>t2;
cout<<"t2为："<<t2<<endl;
cout<<"下面比较两个时间大小：\n";
if (t1>t2) cout<<"t1>t2"<<endl;
if (t1<t2) cout<<"t1<t2"<<endl;
if (t1==t2) cout<<"t1＝t2"<<endl;
if (t1!=t2) cout<<"t1≠t2"<<endl;
if (t1>=t2) cout<<"t1≥t2"<<endl;
if (t1<=t2) cout<<"t1≤t2"<<endl;
cout<<endl;
//下面自行设计对其他运算符的重载的测试
t = t1 + t2;
cout << "t1+t2 = "<< t <<endl;

t = t1 - t2;
cout << "t1-t2 = "<< t <<endl;

t = t1 + 500;
cout << "t1+500 = "<< t <<endl;

t = t1 - 500;
cout << "t1-500 = "<< t <<endl;

++t1;
cout << "++t1 = "<< t <<endl;

--t1;
cout<< "--t1 = "<< t <<endl;

t1 += t2;
cout << "t1+=t2 = "<< t <<endl;

t1 -= t2;
cout << "t1-=t2 = "<< t <<endl;

t2 += 500;
cout <<"t2+=500 = "<< t <<endl;

t2 -= 500;
cout << "t2-=500 = "<< t <<endl;

system("pause");
}