第九周任务二

柔情只为你懂 2022-06-13 12:23 207阅读 0赞

/* 
    实验内容:定义Time类中的<<和>>运算符重载
    * 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： 定义Time类中的<<和>>运算符重载                          
    * 作    者：  薛广晨                             
    * 完成日期：  2012       年  4    月  14      日  
    * 版 本号：  x1.0           
    */
    //【任务2】接第8周任务2，定义Time类中的<<和>>运算符重载，实现时间的输入输出，改造原程序中对运算结果显示方式，使程序读起来更自然。
    #include <iostream>
    
    #include<iomanip>
    
    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)
    	{
    		hour = h;
    		minute = m;
    		second = s;
    	}
    
    	friend ostream& operator << (ostream &,CTime &);
    	friend istream& operator >> (istream &,CTime &);
    
    	//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
    
    ostream& operator << (ostream & ouput,CTime &c)
    {
    	ouput << setw(2) << setfill('0') << c.hour << ":" << setw(2) << setfill('0') << c.minute << ":" << setw(2) << setfill('0') << c.second << endl;
    	return ouput;
    }
    
    istream& operator >> (istream & input,CTime &c)
    {
    	char c1, c2;
    	cout << "请输入一个时间(格式XX：XX：XX)：";
    	input >> c.hour >> c1 >> c.minute  >> c2 >> c.second;
    	do
    	{
    	    if(c1 == ':' && c2 == ':' && c.hour >= 0 && c.hour < 24 && c.minute >= 0 && c.minute < 60 && c.second >= 0 && c.second < 60)break;
    		else
    		{
    			cout << "请重新输入一个时间(格式XX：XX：XX)：";
    		    input >> c.hour >> c.minute >> c.second;
    		}
    		 
    	}while(1);
    	return input;
    }
    
    bool CTime :: operator > (CTime &t)
    {
    	if(hour > t.hour)return true;
    	else if(hour == t.hour)
    	{
    		if(minute > t.minute)return true;
    		else if(minute == t.minute)
    		{
    			if(second > t.second)return true;
    			else return false;
    		}
    		else return false;
    	}
    	else return false;
    }
    
    bool CTime :: operator < (CTime &t)
    {
    	if(hour < t.hour)return true;
    	else if(hour == t.hour)
    	{
    		if(minute < t.minute)return true;
    		else if(minute == t.minute)
    		{
    			if(second < t.second)return true;
    			else return false;
    		}
    		else return false;
    	}
    	else return false;
    }
    
    bool CTime :: operator >= (CTime &t)
    {
    	if(hour < t.hour)return false;
    	else if(hour == t.hour)
    	{
    		if(minute < t.minute)return false;
    		else if(minute == t.minute)
    		{
    			if(second < t.second)return false;
    			else return true;
    		}
    		else return true;
    	}
    	else return true;
    }
    	
    bool CTime :: operator <= (CTime &t)
    {
    	if(hour > t.hour)return false;
    	else if(hour == t.hour)
    	{
    		if(minute > t.minute)return false;
    		else if(minute == t.minute)
    		{
    			if(second > t.second)return false;
    			else return true;
    		}
    		else return true;
    	}
    	else return true;
    }
    
    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 false;
    	else return true;
    }
    
    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
    {
    	CTime c1;
    	c1.second = second + c.second;
    	if(c1.second >= 60)
    	{
    		c1.second = c1.second - 60;
    		c1.minute = minute + 1;
    		if(c1.minute >= 60)
    		{
    			c1.minute = c1.minute - 60;
    			c1.hour = hour + 1;
    			if(c1.hour >= 24)c1.hour = c1.hour - 24;
    		}
    
    	}
    	c1.minute = minute + c.minute;
    	if(c1.minute >= 60)
    	{
    		c1.minute = c1.minute - 60;
    	    c1.hour = c1.hour + 1;
    		if(c1.hour >= 24)c1.hour = c1.hour - 24;
    	}
    	c1.hour = hour + c.hour;
        if(c1.hour >= 24)c1.hour = c1.hour - 24;
    	
    	return c1;
    }
    CTime CTime :: operator-(CTime &c)//对照+理解
    {
    	CTime c1, c2;
    	c1.second = hour * 3600 + minute * 60 + second;
    	c2.second = c.hour * 3600 + c.minute * 60 + c.second;
    	if(c1.second > c2.second)
    	{
    		c1.second = c1.second - c2.second;
    	}
    	else c1.second = c2.second - c1.second;
    	c1.hour = c1.second / 3600;
    	c1.minute = (c1.second % 3600) / 60;
    	c1.second = (c1.second % 3600) % 60;
    	
    	return c1;
    }
    
    CTime CTime :: operator+(int s)//返回s秒后的时间
    { 
    	CTime c1;
    	c1.second = second + s;         
        if (c1.second > 59)       
        {  
    		c1.minute = minute + c1.second / 60;   
    		c1.second %= 60; 
    	}
    	else c1.minute = minute;
    
    	if (c1.minute > 59)
    	{
    		c1.hour = c1.hour + (c1.minute / 60);
    	    c1.minute %= 60;
    	}
    	else c1.hour = hour;
        if (c1.hour > 23)  
    		c1.hour %= 24; 
    
    	return c1;
    
    }  
     
    CTime CTime :: operator-(int s)//返回s秒前的时间
    { 
    	CTime c1;
    	c1.second = hour * 3600 + minute * 60 + second;
    	c1.second = c1.second - s;
    	c1.hour = c1.second / 3600;
    	c1.minute = (c1.second % 3600) / 60;
    	c1.second = (c1.second % 3600) % 60;
    	
    	return c1;
    
    }  
    
    //一目运算符的重载
    CTime CTime::operator++(int)//后置++，下一秒
    { 
    	CTime temp(*this);
        second++;
        if(second >= 60)
        { 
    		second -= 60;
            ++minute;
    	    if(minute >= 60)
    	    {
    			minute -= 60;
    		    ++hour;
    		    if(hour >= 24)
    				hour -= hour;
    	     }
         }
    return temp;
    }
    
    CTime CTime :: operator++()//前置++，下一秒
    { 
    	CTime temp(*this);
        second++;
        if(second >= 60)
        { 
    		second -= 60;
            ++minute;
    	    if(minute >= 60)
    	    {
    			minute -= 60;
    		    ++hour;
    		    if(hour >= 24)
    				hour -= hour;
    	     }
         }
    return *this;
    }
    
    CTime CTime :: operator--(int)//后置--，前一秒
    {
    	CTime temp(*this);
    	second = hour * 3600 + minute * 60 + second;
    	second -= 1 ;
    	hour = second / 3600;
    	minute = (second % 3600) / 60;
    	second = (second % 3600) % 60;
    	
    	return temp;
    }
    
    CTime CTime :: operator--()//前置--，前一秒
    {
    	CTime temp(*this);
    	second = hour * 3600 + minute * 60 + second;
    	second -= 1 ;
    	hour = second / 3600;
    	minute = (second % 3600) / 60;
    	second = (second % 3600) % 60;
    	
    	return *this;
    }
    
    //赋值运算符的重载     
    CTime CTime :: operator+=(CTime &c)
    {
    	CTime c1;
    	c1.second = second + c.second;
    	if(c1.second >= 60)
    	{
    		c1.second = c1.second - 60;
    		c1.minute = minute + 1;
    		if(c1.minute >= 60)
    		{
    			c1.minute = c1.minute - 60;
    			c1.hour = hour + 1;
    			if(c1.hour >= 24)c1.hour = c1.hour - 24;
    		}
    
    	}
    	c1.minute = minute + c.minute;
    	if(c1.minute >= 60)
    	{
    		c1.minute = c1.minute - 60;
    	    c1.hour = c1.hour + 1;
    		if(c1.hour >= 24)c1.hour = c1.hour - 24;
    	}
    	c1.hour = hour + c.hour;
        if(c1.hour >= 24)c1.hour = c1.hour - 24;
    	
    	return c1;
    }
    	
    CTime CTime :: operator-=(CTime &c)
    {
    	CTime c1, c2;
    	c1.second = hour * 3600 + minute * 60 + second;
    	c2.second = c.hour * 3600 + c.minute * 60 + c.second;
    	if(c1.second > c2.second)
    	{
    		c1.second = c1.second - c2.second;
    	}
    	else c1.second = c2.second - c1.second;
    	c1.hour = c1.second / 3600;
    	c1.minute = (c1.second % 3600) / 60;
    	c1.second = (c1.second % 3600) % 60;
    	
    	return c1;
    
    }
    
    CTime CTime :: operator+=(int s)//返回s秒后的时间
    { 
    	CTime c1;
    	c1.second = second + s;         
        if (c1.second > 59)       
        {  
    		c1.minute = minute + c1.second / 60;   
    		c1.second %= 60; 
    	}
    	else c1.minute = minute;
    
    	if (c1.minute > 59)
    	{
    		c1.hour = c1.hour + (c1.minute / 60);
    	    c1.minute %= 60;
    	}
    	else c1.hour = hour;
        if (c1.hour > 23)  
    		c1.hour %= 24; 
    
    	return c1;
    
    }  
    CTime CTime :: operator-=(int s)//返回s秒前的时间
    { 
    	CTime c1;
    	c1.second = hour * 3600 + minute * 60 + second;
    	c1.second = c1.second - s;
    	c1.hour = c1.second / 3600;
    	c1.minute = (c1.second % 3600) / 60;
    	c1.second = (c1.second % 3600) % 60;
    	
    	return c1;
    }  
    
    void main()
    {
    	CTime t1, t2, t;
    	cin >> t1 >> 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 和 t2的时间差是： " << t;
    
    	t = t1 + 50;
    	cout << "t1 + 50 = " << t;
    
    	t = t1 - 50;
    	cout << "t1 - 50 = " << t;
    
    	t = t1++;
    	cout << "t1++ = " << t;
    
    	t = ++t1;
    	cout << "++t1 = " << t;
        
    	t = t1--;
    	cout << "t1-- = " << t;
    
    	t = --t1;
    	cout << "--t1  = " << t;
    
    	t = (t1 += t2);
    	cout << "经过t1 += t2运算后为：" << t;
    
    	t = (t1 -= t2);
    	cout << "经过t1 -= t2运算后为：" << t;
    
    	t = (t1 += 60);
    	cout << "经过t1 += 60运算后为：" << t;
    
    	t = (t1 -= 60);
    	cout << "经过t1 -= 60运算后为：" << t;
    
        system("pause");
    
    }

![1334413530_4304.jpg][]  
上机感言：大部分还是原来的代码，没大变化。

[1334413530_4304.jpg]: https://img-my.csdn.net/uploads/201204/14/1334413530_4304.jpg