C++第8周(春)项目2 实现Time类中的运算符重载 .

来源:互联网 发布:成都多益网络996 编辑:程序博客网 时间:2024/06/01 09:36
01./* 02.*程序的版权和版本声明部分: 03.*Copyright(c)2013,烟台大学计算机学院学生 . 04.*All rights reserved. 05.*作者:李家豪 06.*完成日期:2014年4月17日. 07.*版本号:v0.1。 08.*问题描述: 09.*程序输入: 10.*程序输出: 11.*问题分析: 12.*算法设计: 13.*我的程序: 14.*/#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);    void display();    //比较运算符(二目)的重载    //比较运算返回的是比较结果,是bool型的true或false    //    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    //返回t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 &t);    CTime operator-(CTime &t);//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    //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;}void CTime::display(){    cout<<hour<<':'<<minute<<':'<<second<<endl;}bool CTime::operator > (CTime &t) // 判断时间t1>t2{    if (hour>t.hour) return true;    if (hour<t.hour) return false;    if (minute>t.minute) return true;    if (minute<t.minute) return false;    if (second>t.second) return true;    return false;}bool CTime::operator < (CTime &t)// 判断时间t1<t2{    if (hour<t.hour) return true;    if (hour>t.hour) return false;    if (minute<t.minute) return true;    if (minute>t.minute) return false;    if (second<t.second) return true;    return false;}bool CTime::operator == (CTime &t)// 判断时间t1==t2{    if (*this < t || *this > t) return false;    return true;}bool CTime::operator != (CTime &t) // 判断时间t1!=t2{    if (*this == t) return false;    return true;}bool CTime::operator >= (CTime &t)// 判断时间t1>=t2{    if (*this < t) return false;    return true;}bool CTime::operator <= (CTime &t) // 判断时间t1<=t2{    if (*this > t) return false;    return true;}CTime CTime::operator + (CTime &t){    int h,m,s;    s=second+t.second;    m=minute+t.minute;    h=hour+t.hour;    if (s>59)    {        s-=60;        m++;    }    if (m>59)    {        m-=60;        h++;    }    if (h>23) h-=24;    CTime t0(h,m,s);    return t0;}CTime CTime::operator+(int s){    int ss=s%60;    int mm=(s/60)%60;    int hh=s/3600;    CTime t0(hh,mm,ss);    return *this+t0;}CTime CTime::operator - (CTime &t){    int h,m,s;    s=second-t.second;    m=minute-t.minute;    h=hour-t.hour;    if (s<0)    {        s+=60;        m--;    }    if (m<0)    {        m+=60;        h--;    }    if (h<0) h+=24;    CTime t0(h,m,s);    return t0;}CTime CTime::operator-(int s){    int ss=s%60;    int mm=(s/60)%60;    int hh=s/3600;    CTime t0(hh,mm,ss);    return *this-t0;}CTime CTime::operator+=(CTime &c){    *this=*this+c;    return *this;}CTime CTime::operator-=(CTime &c){    *this=*this-c;    return *this;}CTime CTime::operator+=(int s)//返回s秒后的时间{    *this=*this+s;    return *this;}CTime CTime::operator-=(int s)//返回s秒前的时间{    *this=*this-s;    return *this;}int main(){    CTime t1(8,20,25),t2(11,20,50),t;    cout<<"t1的值为:";    t1.display();    cout<<"t2的值为:";    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;    t=t1+t2;    t=t1-t2;    t=t1+2000;    t=t1-5000;    t1+=t2;    t1-=t2;    t1+=2000;    t1-=5000;    return 0;}


运行结果:

体会心得:  用心就有收获.

0 0