对象前置++,前置--;后置++,后置--(没有利用《和》重载运算符)

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/*烟台大学计算机学院学生*All right reserved.*文件名称*烟台大学计算机学院学生*All right reserved.*文件名称:对象前置++,前置--;后置++,后置--*作者:杨飞*完成日期:2014年4月11日*版本号:v1.0*对任务及求解方法的描述部分:项目一:对象前置++,前置--;后置++,后置--*我的程序:*/#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: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 operator++(int);//后置++    CTime operator++();//前置++    CTime operator--(int);//后置--    CTime operator--();//前置--};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 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)    return false;    return true;} bool CTime::operator <= (CTime &t) {     if(*this>t)     return false;    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(*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 t3(h,m,s);    return t3;}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 t3(h,m,s);    return t3;}CTime CTime::operator+(int s){    int s1=s%60;    int m1=s/60;    int h1=s/3600;    CTime t3(h1,m1,s1);    return *this+t3;}CTime CTime::operator-(int s){    int  s1,m1,h1;    s1=s%60;    m1=s/60;    h1=s/3600;    CTime t3(h1,m1,s1);    return *this-t3;}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;}CTime CTime::operator++(int){    CTime temp(*this);       second++;    if(second>59)    {        second-=60;        minute++;    }    if(minute>59)    {        minute-=60;        hour++;    }    if(hour>23)    {        hour-=24;    }   return  temp;}CTime CTime::operator++(){      ++second;    if(second>59)    {        second-=60;        minute++;    }    if(minute>59)    {        minute-=60;        hour++;    }    if(hour>23)    {        hour-=24;    }    return *this;}CTime CTime::operator--(int){    CTime temp(*this);     second--;     if (second<0)    {        second+=60;        minute--;   }    if (minute<0)    {       minute+=60;        hour--;    }    if (hour<0) hour+=24;    return temp;}CTime CTime::operator--(){    --second;    if (second<0)    {        second+=60;        minute--;   }    if (minute<0)    {       minute+=60;        hour--;    }    if (hour<0) hour+=24;    return *this;}int main(){   CTime t1(10,20,25),t2(6,20,45),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不等于t2"<<endl;   if (t1>=t2) cout<<"t1大于或等于t2"<<endl;   if (t1<=t2) cout<<"t1小于或等于t2"<<endl;   cout<<endl;   t=t1+t2;   cout<<"两个时间相加处理后的时间;"<<endl;   t.display();   t=t1-t2;   cout<<"两个时间相减处理后的时间;"<<endl;   t.display();   cout<<"+600秒处理后的时间;"<<endl;   t=t1+600;   t.display();   cout<<"-400秒处理后的时间;"<<endl;   t=t1-400;   t.display();   cout<<"加上一个时间赋予本身"<<endl;   t1+=t2;   t1.display();   cout<<"减去一个时间赋予本身"<<endl;   t1-=t2;   t1.display();   cout<<"加600秒赋予本身"<<endl;   t1+=600;   t1.display();   cout<<"减600秒赋予本身"<<endl;   t1-=600;   t1.display();   cout<<"前置++的结果:"<<endl;       ++t1;       t1.display();    cout<<"前置--的结果:"<<endl;        --t1;       t1.display();    cout<<"后置++的结果:"<<endl;         t1++;       t1.display();    cout<<"后置--的结果:"<<endl;        t1--;       t1.display();    return 0;}

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