时间类运算符重载-优快云博客

#include <iostream>   
14.using namespace std;  
15.class CTime  
16.{  
17.private:  
18.    unsigned short int hour;    // 时   
19.    unsigned short int minute;  // 分   
20.    unsigned short int second;  // 秒   
21.public:  
22.    CTime(int h=0,int m=0,int s=0);  
23.    void setTime(int h,int m,int s);  
24.    void display();  
25.    //二目的比较运算符重载   
26.    bool operator > (CTime &t);  
27.    bool operator < (CTime &t);  
28.    bool operator >= (CTime &t);  
29.    bool operator <= (CTime &t);  
30.    bool operator == (CTime &t);  
31.    bool operator != (CTime &t);  
32.    //二目的加减运算符的重载   
33.    //返回t规定的时、分、秒后的时间   
34.    //例t1(8,20,25),t2(11,20,50)，t1+t2为19:41:15   
35.    CTime operator+(CTime &t);  
36.    CTime operator-(CTime &t);//对照+理解   
37.    CTime operator+(int s);//返回s秒后的时间   
38.    CTime operator-(int s);//返回s秒前的时间   
39.    //二目赋值运算符的重载   
40.    CTime operator+=(CTime &c);  
41.    CTime operator-=(CTime &c);  
42.    CTime operator+=(int s);//返回s秒后的时间   
43.    CTime operator-=(int s);//返回s秒前的时间   
44.};  
45.CTime::CTime(int h,int m,int s)  
46.{  
47.    hour=h;  
48.    minute=m;  
49.    second=s;  
50.}  
51.bool CTime::operator > (CTime &t)  
52.{  
53.    if(hour>t.hour)  
54.        return true;  
55.    if(hour==t.hour)  
56.    {  
57.       if(minute>t.minute)  
58.          return true;  
59.          if(minute==t.minute)  
60.          {  
61.              if(second>t.second)  
62.                return true;  
63.          }  
64.    }  
65.    else  
66.        return false;  
67.}  
68.bool CTime::operator < (CTime &t)  
69.{  
70.    if(hour<t.hour)  
71.        return true;  
72.    if(hour==t.hour)  
73.    {  
74.       if(minute<t.minute)  
75.          return true;  
76.          if(minute==t.minute)  
77.          {  
78.              if(second<t.second)  
79.                return true;  
80.          }  
81.    }  
82.    else  
83.        return false;  
84.}  
85.bool CTime::operator >= (CTime &t)  
86.{  
87.    return !(*this<t);  
88.}  
89.bool CTime::operator <= (CTime &t)  
90.{  
91.    return !(*this>t);  
92.}  
93.bool CTime::operator == (CTime &t)  
94.{  
95.    if(hour==t.hour&&minute==t.minute&&second==t.second)  
96.        return true;  
97.    else  
98.        return false;  
99.}  
100.bool CTime::operator != (CTime &t)  
101.{  
102.    if(hour!=t.hour||minute!=t.minute||second!=t.second)  
103.        return true;  
104.    else  
105.        return false;  
106.}  
107.CTime CTime::operator+(CTime &t)  
108.{  
109.    CTime tt;  
110.    tt.hour=hour+t.hour;  
111.    tt.minute=minute+t.minute;  
112.    tt.second=second+t.second;  
113.    if(tt.second>59)  
114.    {  
115.        tt.second-=60;  
116.        tt.minute++;  
117.    }  
118.    if(tt.minute>59)  
119.    {  
120.        tt.minute-=60;  
121.        tt.hour++;  
122.    }  
123.    if(tt.hour>23)  
124.        tt.hour-=24;  
125.    return tt;  
126.}  
127.CTime CTime::operator-(CTime &t)  
128.{  
129.    CTime tt;  
130.    tt.hour=hour-t.hour;  
131.    tt.minute=minute-t.minute;  
132.    tt.second=second-t.second;  
133.    if(tt.second<0)  
134.    {  
135.        tt.second+=60;  
136.        tt.minute--;  
137.    }  
138.    if(tt.minute<0)  
139.    {  
140.        tt.minute+=60;  
141.        tt.hour--;  
142.    }  
143.    if(tt.hour<0)  
144.        tt.hour+=24;  
145.    return tt;  
146.}  
147.CTime CTime::operator+(int s)  
148.{  
149.    CTime tt;  
150.    tt.second=second+s;  
151.    if(tt.second>59)  
152.    {  
153.        tt.minute=minute+tt.second/60;  
154.        tt.second=tt.second%60;  
155.    }  
156.    if(tt.minute>59)  
157.    {  
158.        tt.hour=hour+tt.hour/60;  
159.        tt.minute=tt.minute%60;  
160.    }  
161.    if(tt.hour>23)  
162.        tt.hour=0;  
163.    return tt;  
164.}  
165.CTime CTime::operator-(int s)//聪明的做法！！   
166.{  
167.    CTime tt;  
168.    tt.second=s%60;;  
169.    tt.minute=(s/60)%60;  
170.    tt.hour=s/3600;  
171.    return *this-tt;  
172.}  
173.CTime CTime::operator+=(CTime &c)  
174.{  
175.    *this=*this+c;  
176.    return *this;  
177.}  
178.CTime CTime::operator-=(CTime &c)  
179.{  
180.    *this=*this-c;  
181.    return *this;  
182.}  
183.CTime CTime::operator+=(int s)  
184.{  
185.     *this=*this+s;  
186.     return *this;  
187.}  
188.CTime CTime::operator-=(int s)  
189.{  
190.     *this=*this-s;  
191.     return *this;  
192.}  
193.void CTime::setTime(int h,int m,int s)  
194.{  
195.    hour=h;  
196.    minute=m;  
197.    second=s;  
198.}  
199.void CTime::display()  
200.{  
201.    cout<<hour<<":"<<minute<<":"<<second<<endl;  
202.}  
203.int main()  
204.{  
205.    CTime t1(12,54,59),t2(15,54,43),t;  
206.    cout<<"t1：";  
207.    t1.display();  
208.    cout<<"t2：";  
209.    t2.display();  
210.    t=t1+t2;  
211.    cout<<"t1+t2=";  
212.    t.display();  
213.    t=t1-t2;  
214.    t=t1+150;  
215.    t=t2-280;  
216.    t1+=t2;  
217.    t2-=t1;  
218.    t1+=340;  
219.    t2-=360;  
220.    if(t1>t2)  
221.        cout<<"t1>t2"<<endl;  
222.    if(t1<t2)  
223.        cout<<"t1<t2"<<endl;  
224.    if(t1==t2)  
225.        cout<<"t1=t2"<<endl;  
226.    if(t1!=t2)  
227.        cout<<"t1≠t2"<<endl;  
228.    if(t1>=t2)  
229.        cout<<"t1≥t2"<<endl;  
230.    if(t1<=t2)  
231.        cout<<"t1小于等于t2"<<endl;  
232.    return 0;  
233.}  
/*
* Copyright (c) 2015, 烟台大学计算机学院
* All rights reserved.
* 文件名称：Project2.cpp
* 作    者：李楠
* 完成日期：2015年4月23日
* 版 本 号：v1.0
*
* 问题描述： 实现Time类中的运算符重载。
* 输入描述：
* 程序输出：
*/
#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();
    //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;
}
bool CTime::operator > (CTime &t)
{
    if(hour>t.hour)
        return true;
    if(hour==t.hour)
    {
       if(minute>t.minute)
          return true;
          if(minute==t.minute)
          {
              if(second>t.second)
                return true;
          }
    }
    else
        return false;
}
bool CTime::operator < (CTime &t)
{
    if(hour<t.hour)
        return true;
    if(hour==t.hour)
    {
       if(minute<t.minute)
          return true;
          if(minute==t.minute)
          {
              if(second<t.second)
                return true;
          }
    }
    else
        return false;
}
bool CTime::operator >= (CTime &t)
{
    return !(*this<t);
}
bool CTime::operator <= (CTime &t)
{
    return !(*this>t);
}
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;
}
CTime CTime::operator+(CTime &t)
{
    CTime tt;
    tt.hour=hour+t.hour;
    tt.minute=minute+t.minute;
    tt.second=second+t.second;
    if(tt.second>59)
    {
        tt.second-=60;
        tt.minute++;
    }
    if(tt.minute>59)
    {
        tt.minute-=60;
        tt.hour++;
    }
    if(tt.hour>23)
        tt.hour-=24;
    return tt;
}
CTime CTime::operator-(CTime &t)
{
    CTime tt;
    tt.hour=hour-t.hour;
    tt.minute=minute-t.minute;
    tt.second=second-t.second;
    if(tt.second<0)
    {
        tt.second+=60;
        tt.minute--;
    }
    if(tt.minute<0)
    {
        tt.minute+=60;
        tt.hour--;
    }
    if(tt.hour<0)
        tt.hour+=24;
    return tt;
}
CTime CTime::operator+(int s)
{
    CTime tt;
    tt.second=second+s;
    if(tt.second>59)
    {
        tt.minute=minute+tt.second/60;
        tt.second=tt.second%60;
    }
    if(tt.minute>59)
    {
        tt.hour=hour+tt.hour/60;
        tt.minute=tt.minute%60;
    }
    if(tt.hour>23)
        tt.hour=0;
    return tt;
}
CTime CTime::operator-(int s)//聪明的做法！！
{
    CTime tt;
    tt.second=s%60;;
    tt.minute=(s/60)%60;
    tt.hour=s/3600;
    return *this-tt;
}
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;
}
void CTime::setTime(int h,int m,int s)
{
    hour=h;
    minute=m;
    second=s;
}
void CTime::display()
{
    cout<<hour<<":"<<minute<<":"<<second<<endl;
}
int main()
{
    CTime t1(12,54,59),t2(15,54,43),t;
    cout<<"t1：";
    t1.display();
    cout<<"t2：";
    t2.display();
    t=t1+t2;
    cout<<"t1+t2=";
    t.display();
    t=t1-t2;
    t=t1+150;
    t=t2-280;
    t1+=t2;
    t2-=t1;
    t1+=340;
    t2-=360;
    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小于等于t2"<<endl;
    return 0;
}
输出结果：