第8周项目2-运算符重载

来源：互联网发布：matlab2015b for mac 编辑：程序博客网时间：2024/05/22 02:30
#include <iostream>using namespace std;class CTime{private:     int hour;    // 时     int minute;  // 分     int second;  // 秒public:    CTime(int h=0,int m=0,int s=0);    void setTime(int h,int m,int s);    void display();    //二目的比较运算符重载    bool operator > (CTime &t);    bool operator < (CTime &t);    bool operator >= (CTime &t);    bool operator <= (CTime &t);    bool operator == (CTime &t);    bool operator != (CTime &t);    //二目的加减运算符的重载    //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19:41:15    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    //二目赋值运算符的重载    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::operator-=(int s){    int ss=s%60;    int mm=(s/60)%60;   int hh=s/3600;   CTime t0(hh,mm,ss);   *this=*this-t0;   return *this;}CTime CTime::operator+=(int s){    int ss=s%60;    int mm=(s/60)%60;   int hh=s/3600;   CTime t0(hh,mm,ss);   *this=*this+t0;   return *this;}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){    int ss=s%60;    int mm=(s/60)%60;   int hh=s/3600;   CTime t0(hh,mm,ss);   return *this-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){    CTime a;    a.hour=hour-t.hour;    a.minute=minute-t.minute;    a.second=second-t.second;    if(a.second<0)    {        a.second=a.second+60;        a.minute=a.minute-1;    }    if(a.minute<0)    {         a.minute=a.minute+60;        a.hour=a.hour-1;    }    if(a.hour<0)        a.hour=a.hour+24;    return a;}CTime CTime::operator+(CTime &t){    CTime a;    a.hour=hour+t.hour;    a.minute=minute+t.minute;    a.second=second+t.second;    if(a.second>59)    {        a.second=a.second-60;        a.minute=a.minute+1;    }    if(a.minute>60)    {         a.minute=a.minute-60;        a.hour=a.hour+1;    }    if(a.hour>24)        a.hour=a.hour-24;    return a;}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;}bool CTime::operator <= (CTime &t){    if(hour<=t.hour)        return true;    else if(hour>t.hour)        return false;}bool CTime::operator >= (CTime &t){    if(hour>=t.hour)        return true;    else if(hour<t.hour)        return false;}bool CTime::operator < (CTime &t){    {    if(hour<t.hour)        return true;    else if(hour>t.hour)        return false;    else if(hour==t.hour)    {        if(minute<t.minute)        return true;    else if(minute>t.minute)        return false;        else if(minute==t.minute)        {            if(second<t.second)        return true;    else if(second>=t.second)        return false;        }    }}}bool CTime::operator > (CTime &t){    if(hour>t.hour)        return true;    else if(hour<t.hour)        return false;    else if(hour==t.hour)    {        if(minute>t.minute)        return true;    else if(minute<t.minute)        return false;        else if(minute==t.minute)        {            if(second>t.second)        return true;    else if(second<=t.second)        return false;        }    }}void CTime::display(){    cout<<hour<<":"<<minute<<":"<<second<<endl;}void CTime::setTime(int h,int m,int s){    hour=h;    minute=m;    second=s;}CTime::CTime(int h,int m,int s){    hour=h;    minute=m;    second=s;}int 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;    //在测试下面的代码时，请采用单步执行的方法跟踪    t=t1+t2;    t.display();    t=t1-t2;    t.display();    t=t1+2000;    t.display();    t=t1-5000;    t.display();  t1+=t2;  t1.display();    t1-=t2;    t1.display();    t1+=2000;    t1.display();    t1-=5000;    t1.display();   return 0;}
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