第九周任务二时间输入输出运算符重载_class times{ public: times(int=0,int=0,int=0); fri-优快云博客

本文链接：https://blog.youkuaiyun.com/kamiming/article/details/7474933
本文介绍了一个名为CTime的类，该类用于处理时间的运算和比较操作。CTime类支持基本的时间设置，并实现了时间的加减运算以及各种比较运算。此外，还提供了自增自减运算符的重载。
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/* (程序头部注释开始)
* 程序的版权和版本声明部分
* Copyright (c) 2011, 烟台大学计算机学院学生 
* All rights reserved.
* 文件名称： 
* 作    者：  姜雅明  
* 完成日期：  2012    年   04    月   17    日
* 版 本 号：  1.0

* 对任务及求解方法的描述部分
* 输入描述： 输入两个时间
* 问题描述： 时间的运算和比较
* 程序输出： 运算后的值
* 程序头部的注释结束
*/

#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):hour(h), minute(m), second(s){};
	void setTime(int h,int m,int s);
	friend ostream & operator << (ostream &output, CTime &c);
	friend istream & operator >> (istream &input, CTime &c);
	//比较运算符(二目)的重载
	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
};
//下面实现所有的运算符重载代码。
//为简化编程，请注意通过调用已有函数，利用好各函数之间的关系
void CTime::setTime(int h,int m,int s)
{
	hour = h; minute = m; second = s;
}

ostream & operator << (ostream &output, CTime &c)
{
	output << c.hour << ":" << c.minute << ":" << c.second << endl;

	return output;
}

istream & operator >> (istream &input, CTime &c)
{
	char s;

	do
	{
		cout << "请输入时间(xx:xx:xx)：";

		input >> c.hour >> s >> c.minute >> s >> c.second;
	}while(s != ':');

	return input;
}
bool CTime::operator > (CTime &t)
{
	if(hour > t.hour)
	{
		return true;
	}
	else if(minute > t.minute)
	{
		return true;
	}
	else if(second > t.second)
	{
		return true;
	}
	else
	{
		return false;
	}
}

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

bool CTime::operator >= (CTime &t)
{
	if((*this) > t || (*this) == t)
	{
		return true;
	}
	else
	{
		return false;
	}
}

bool CTime::operator <= (CTime &t)
{
	if((*this) < t || (*this) == t)
	{
		return true;
	}
	else
	{
		return false;
	}
}

bool CTime::operator == (CTime &t)
{
	if(hour == t.hour && minute == t.minute && second == t.second)
	{
		return true;
	}
	else
	{
		return false;
	}
}

bool CTime::operator != (CTime &t)
{
	if(hour != t.hour || minute != t.minute || second != t.second)
	{
		return true;
	}
	else
	{
		return false;
	}
}

CTime CTime::operator + (CTime &c)
{
	CTime t(*this);

	t.second+=  c.second;
	if (t.second >= 60)         
	{      
		t.minute+= t.second/60;        
		t.second%= 60;            
	}

	t.minute+=  c.minute;      
	if (t.minute>=60)       
	{      
		t.hour+= t.minute/60;      
		t.minute%= 60;      
	}

	t.hour+= c.hour;
	if (t.hour>23) 
	{
		t.hour%=24;
	}
	return t;
}

CTime CTime::operator - (CTime &c)
{      
	CTime t(*this);

	if (t.second < c.second)         
	{    
		t.second+= 60;
		t.second-= c.second;
		t.minute-= 1;   
	}
	else
	{
		t.second-= c.second;
	}

	if (t.minute < c.minute)       
	{      
		t.minute+= 60;
		t.minute-=  c.minute;
		t.hour-= 1;
	}
	else
	{
		t.minute-=  c.minute;
	}

	if (t.hour < c.hour) 
	{
		t.hour+=24;
		t.hour-= c.hour;
	}
	else
	{
		t.hour-= c.hour;
	}
	return t;
}
CTime CTime::operator + (int s)
{
	CTime t(*this);

	t.second+= s; 

	if(t.second >= 60)  
	{  
		t.minute = second / 60 + minute; 

		t.second = second % 60;  

		if(t.minute >= 60)  
		{  
			t.hour = hour + minute / 60;

			t.minute = minute % 60; 

			if(t.hour >= 24)
			{
				t.hour%= 24;
			}
		}  
	} 
	return t;
}
CTime CTime::operator - (int s)
{
	CTime t(*this);

	int x;

	x = t.hour * 3600 + t.minute * 60 + t.second;

	x = x - s;

	t.hour = x / 3600;

	x = x % 3600;

	t.minute = x / 60;

	t.second = x % 60;

	return t;
}

CTime CTime::operator ++ (int)//后置++，下一秒
{
	CTime t(*this);

	int x;

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

	x = x + 1;

	hour = x / 3600;

	x = x % 3600;

	minute = x / 60;

	second = x % 60;

	return t;
}

CTime CTime::operator ++ ()//前置++，下一秒
{
	CTime t(*this);

	int x;

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

	x = x + 1;

	hour = x / 3600;

	x = x % 3600;

	minute = x / 60;

	second = x % 60;

	return (*this);
}

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

	int x;

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

	x = x - 1;

	hour = x / 3600;

	x = x % 3600;

	minute = x / 60;

	second = x % 60;

	return t;
}

CTime CTime::operator -- ()//前置--，前一秒
{
	CTime t(*this);

	int x;

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

	x = x - 1;

	hour = x / 3600;

	x = x % 3600;

	minute = x / 60;

	second = x % 60;

	return (*this);
}

CTime CTime::operator+= (CTime &c)
{
	second+=  c.second;             
	if (second >= 60)         
	{      
		minute+= second/60;        
		second%= 60;            
	}

	minute+=  c.minute;      
	if (minute>=60)       
	{      
		hour+= minute/60;      
		minute%= 60;      
	}

	hour+= c.hour;
	if (hour>23) 
	{
		hour%=24;
	}
	return (*this);
}

CTime CTime::operator-= (CTime &c)
{			
	if (second < c.second)         
	{    
		second+= 60;
		second-= c.second;
		minute-= 1;   
	}
	else
	{
		second-= c.second;
	}

	if (minute < c.minute)       
	{      
		minute+= 60;
		minute-=  c.minute;
		hour-= 1;
	}
	else
	{
		minute-=  c.minute;
	}

	if (hour < c.hour) 
	{
		hour+=24;
		hour-= c.hour;
	}
	else
	{
		hour-= c.hour;
	}
	return (*this);
}

CTime CTime::operator+= (int s)//返回s秒后的时间
{
	second+= s; 

	if(second >= 60)  
	{  
		minute = second / 60 + minute; 

		second = second % 60;  

		if(minute >= 60)  
		{  
			hour = hour + minute / 60;

			minute = minute % 60; 

			if(hour >= 24)
			{
				hour%= 24;
			}
		}  
	} 
	return (*this);
}

CTime CTime::operator-= (int s)//返回s秒前的时间
{
	int x;

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

	x = x - s;

	hour = x / 3600;

	x = x % 3600;

	minute = x / 60;

	second = x % 60;

	return (*this);
}
void main()
{
	CTime t1,t2,t;

	cin >> t1;

	cin >> t2;

	cout << "t1为：" << t1;

	cout << "t2为：" << t2;

	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;

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

	t = t1 + 20;
	cout << "t1增加20秒：" << t;

	t = t1 - 30;
	cout << "t1减少30秒：" << t;

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

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

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

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

	t = t1;
	t+=12;
	cout << "t1后12秒为：" << t;

	t = t2;
	t-=20;
	cout << "t2前20秒为：" << t;

	t = t1;
	t+=t2;
	cout << "t1+=t2为：" << t;

	t = t1;
	t-=t2;
	cout << "t1-=t2为：" << t;

	system("pause");
}