第九周任务

#include <iostream>using namespace std;class CTime{private:    unsigned short int hour;    unsigned short int minute;    unsigned short int second;public:    CTime(int h=0,int m=0,int s=0);    void SetTime(int h,int m,int s);    friend istream &operator>>(istream &in,CTime &t);    friend ostream &operator<<(ostream &out, CTime t);    bool operator >(CTime &t);    bool operator <(CTime &t);    bool operator>=(CTime &t);    bool operator<=(CTime &t);    bool operator==(CTime &t);    bool operator!=(CTime &t);    CTime operator+(CTime &c);    CTime operator-(CTime &c);    CTime operator+(int s);    CTime operator-(int s);    CTime operator++(int);    CTime operator++();    CTime operator--(int);    CTime operator--();    CTime operator+=(CTime &c);    CTime operator-=(CTime &c);    CTime operator+=(int s);    CTime operator-=(int s);};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;}istream & operator>>(istream &in,CTime &t){    char ch1,ch2;    while(1)    {        cout<<"请输入时间（hh:mm:ss）";        cin>>t.hour>>ch1>>t.minute>>ch2>>t.second;        if (ch1==':'&&ch2==':')            if(t.hour>-1&&t.hour<24&&t.minute>-1&&t.minute<60&&t.second>-1&&t.second<60)break;        cerr<<"输入时间格式不对！请重新输入！\n";        break ;    }    return cin;}ostream &operator<<(ostream &out,CTime t){    out<<t.hour<<':'<<t.minute<<':'<<t.second;    return out;}bool CTime::operator > (CTime &t){    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){    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){    if (*this<t || *this>t) return false;    return true;}bool CTime::operator != (CTime &t){    if (*this==t) return false;    return true;}bool CTime::operator >= (CTime &t){    if (*this<t) return false;    return true;}bool CTime::operator <= (CTime &t){    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++;    }    while (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--;    }    while (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++(int){    CTime t=*this;    *this=*this+1;    return t;}CTime CTime::operator++(){    *this=*this+1;    return *this;}CTime CTime::operator--(int){    CTime t=*this;    *this=*this-1;    return t;}CTime CTime::operator--(){    *this=*this-1;    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){    *this=*this+s;    return *this;}CTime CTime::operator-=(int s){    *this=*this-s;    return *this;}int main(){    CTime t1,t2,t;    cout<<"t1为：";    cin>>t1;    cout<<"t2为：";    cin>>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;    cout<<"t1= "<<t1<<endl;    cout<<"t2= "<<t2<<endl;    cout<<"t=t1++"<<endl;    t=t1++;    cout<<"t= "<<t<<"    t1= "<<t1<<endl;    cout<<"t=++t1"<<endl;    t=++t1;    cout<<"t= "<<t<<"    t1= "<<t1<<endl;    cout<<"t1+t2= "<<t1+t2<<endl;    cout<<"t1-t2= "<<t1-t2<<endl;    cout<<"t1+2000= "<<t1+2000<<endl;    cout<<"t1-5000= "<<t1-5000<<endl;    return 0;}