第8周任务2

实验目的

 

实验内容

 

源程序

/*

*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.

*作   者：        计114-3   付文杰                     

*完成日期：     2012   年   4   月  10     日

*版本号：         

 

*对任务及求解方法的描述部分

*输入描述：

*问题描述：

*程序输出：

*问题分析：

*算法设计：

*/

 

//【任务2】实现Time类中的运算符重载#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;}void display();/*void add_seconds(int); //增加n秒钟void add_minutes(int); //增加n分钟  void add_hours(int); //增加n小时 *///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:41:15CTime 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 :: display(){cout << setw(2) << setfill('0') << hour << ":" << setw(2) << setfill('0') << minute << ":" << setw(2) << setfill('0') << second << endl;}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(8,20,25),t2(11,20,50),t;cout<<"t1为：";t1.display();cout<<"t2为：";t2.display();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.display();t = t1 - t2;cout << "t1 和 t2的时间差是： ";t.display();t = t1 + 50;cout << "t1 + 50 = ";t.display();t = t1 - 50;cout << "t1 - 50 = ";t.display();t = t1++;cout << "t1++ = ";t.display();t = ++t1;cout << "++t1 = ";t.display();    t = t1--;cout << "t1-- = ";t.display();t = --t1;cout << "--t1  = ";t.display();t = (t1 += t2);cout << "经过t1 += t2运算后为：";t.display();t = (t1 -= t2);cout << "经过t1 -= t2运算后为：";t.display();t = (t1 += 60);cout << "经过t1 += 60运算后为：";t.display();t = (t1 -= 60);cout << "经过t1 -= 60运算后为：";t.display();    system("pause");}

运行结果：