2015-第8周项目2-Time类中的运算符重载

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【项目2-Time类中的运算符重载】
实现Time类中的运算符重载。
#include <iostream>#include <algorithm>#include <cmath>#include <cstring>#include <cstdio>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();    //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(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){    if(hour > t.hour)return 1;    if(hour < t.hour)return 0;    if(minute <t.minute)return 0;    if(minute >t.minute)return 1;    if(second < t.second)return 0;    return 1;}bool CTime::operator<(CTime &t){    if(hour > t.hour)return 0;    if(hour < t.hour)return 1;    if(minute <t.minute)return 1;    if(minute >t.minute)return 0;    if(second < t.second)return 1;    return 0;}bool CTime::operator==(CTime &t){    if(*this < t || *this > t)return 0;    return 1;}bool CTime::operator!=(CTime &t){    if(*this == t)return 0;    return 1;}bool CTime::operator>=(CTime &t){    if(*this < t)return 0;    return 1;}bool CTime::operator<=(CTime &t){    if(*this > t)return 0;    return 1;}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 + (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-(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){    *this=*this+s;    return *this;}CTime CTime::operator-=(int s){    *this=*this-s;    return *this;}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;    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;    t.display();    return 0;}
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