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第八周实验报告2

2012-04-10 20:43 232 查看
实验目的：完成一大堆运载符的重载

实验代码：

#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();
//比较运算符(二目)的重载
bool operator > (CTime &t);
bool operator < (CTime &t);
bool operator >= (CTime &t);
bool operator <= (CTime &t);
bool operator == (CTime &t);
bool operator != (CTime &t);
//二目运算符的重载
CTime operator + (CTime &c);//返回c所规定的时、分、秒后的时间，例t1(8,20,25),t2(11,20,50)，t1+t2为:41:15
CTime operator - (CTime &c);//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
//一目运算符的重载
CTime operator ++ (int);//后置++，下一秒
CTime operator ++ ();//前置++，下一秒
CTime operator -- (int);//后置--，前一秒
CTime operator -- ();//前置--，前一秒
//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
};

void main()
{
CTime t1(8, 20, 25), t2(11, 20, 50), t, t3;
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;
cout << "t1 + t2 = ";
t = t1 + t2;
t.display();
cout << "t2 - t1 =";
t3 = t2 - t1;
t3.display();

int n;
cout << endl;
t.display();
cout <<"请输入您想在原有时间之上增加的秒数：";
cin >> n;
t = t + n;
t.display();

int m;

cout << "请输入您想在当前时间之上减少的秒数：";
cin >> m;
t = t - m;
t.display();

cout << endl;

t = t ++;
cout << "t++ = ";
t.display();

t = ++ t;
cout << "++t =";
t.display();

cout << endl;

t = t --;
cout << "t-- = ";
t.display();

t = -- t;
cout << "--t = ";
t.display();
cout << endl;

t = t1 += t2;
cout << "t1 += t2 = ";
t.display();

t = t2 -= t1;
cout << "t2 -= t1 = ";
t.display();

int s;
cout << endl;
t.display();
cout << "请输入您想在当前时间之上增加的秒数： ";
cin >> s;
t = t += s;
t.display();

int s1;
cout << "请输入您想在当前时间之上减少的秒数： ";
cin >> s1;
t = t -= s1;
t.display();
system("pause");
}

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;
else
{
if(hour == t.hour)
{
if(minute > t.minute)
return true;
else
{
if(minute == t.minute)
{
if(second > t.second)
return true;
else
return false;
}
else
return false;
}
}
else
return false;
}
}

bool CTime::operator < (CTime &t)
{
if(hour < t.hour)
return true;
else
{
if(hour == t.hour)
{
if(minute < t.minute)
return true;
else
{
if(minute == t.minute)
{
if(second < t.second)
return true;
else
return false;
}
else
return false;
}
}
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 || minute != t.minute || second != t.second)
return true;
else
return false;
}

CTime CTime::operator + (CTime &c)
{
CTime c1;
c1.hour = hour + c.hour;
c1.minute = minute + c.minute;
c1.second = second + c.second;
if(c1.second >= 60)
{
c1.second = c1.second - 60;
c1.minute ++;
if(c1.minute >= 60)
{
c1.minute = c1.minute - 60;
c1.hour ++;
if(c1.hour >= 24)
{
c1.hour = c1.hour - 24;
}
}
}
if(c1.minute >= 60)
{
c1.minute = c1.minute - 60;
c1.hour ++;
if(c1.hour >= 24)
{
c1.hour = c1.hour - 24;
}
}
if(c1.hour >= 24)
{
c1.hour = c1.hour - 24;
}

return c1;
}
CTime CTime::operator - (CTime &c)
{
CTime c1;
int sec, sec1, sec2;
sec1 = second + minute * 60 + hour * 3600;
sec2 = c.second + c.minute * 60 + c.hour * 3600;
sec = sec1 - sec2;
c1.hour = sec / 3600;
sec = sec % 3600;
c1.minute = sec / 60;
c1.second = sec % 60;

return c1;
}

CTime CTime::operator + (int s)
{
CTime c;
c.second = second + s;
if(c.second >= 60)
{
c.minute = minute + c.second / 60;
{
if(c.minute >= 60)
{
c.hour = hour + c.minute / 60;
c.minute = c.minute % 60;
}
else
c.hour = hour;
}
c.second = c.second % 60;
}
else
{
c.minute = minute;
c.hour = hour;
}
return c;
}
CTime CTime::operator - (int s)
{
CTime c;
int sec;
sec = second + minute * 60 + hour * 3600 - s;
c.hour = sec / 3600;
sec = sec % 3600;
c.minute = sec / 60;
sec = sec % 60;
c.second = sec;

return c;
}

CTime CTime::operator ++ (int)  //后置++，下一秒
{
CTime c;
c.second = second ++;
c.minute = minute;
c.hour = hour;
return c;
}
CTime CTime::operator ++ ()//前置++，下一秒
{
CTime c;
c.second = ++ second;
c.minute = minute;
c.hour = hour;
return c;
}
CTime CTime::operator -- (int)  //后置++，下一秒
{
CTime c;
c.second = second --;
c.minute = minute;
c.hour = hour;
return c;
}
CTime CTime::operator -- ()//前置++，下一秒
{
CTime c;
c.second = -- second;
c.minute = minute;
c.hour = hour;
return c;
}

CTime CTime::operator += (CTime &c)
{
CTime c1;
c1.hour = hour + c.hour;
c1.minute = minute + c.minute;
c1.second = second + c.second;
if(c1.second >= 60)
{
c1.second = c1.second - 60;
c1.minute ++;
if(c1.minute >= 60)
{
c1.minute = c1.minute - 60;
c1.hour ++;
if(c1.hour >= 24)
{
c1.hour = c1.hour - 24;
}
}
}
if(c1.minute >= 60)
{
c1.minute = c1.minute - 60;
c1.hour ++;
if(c1.hour >= 24)
{
c1.hour = c1.hour - 24;
}
}
if(c1.hour >= 24)
{
c1.hour = c1.hour - 24;
}

return c1;
}
CTime CTime::operator -= (CTime &c)
{
CTime c1;
int sec, sec1, sec2;
sec1 = second + minute * 60 + hour * 3600;
sec2 = c.second + c.minute * 60 + c.hour * 3600;
sec = sec1 - sec2;
c1.hour = sec / 3600;
sec = sec % 3600;
c1.minute = sec / 60;
c1.second = sec % 60;

return c1;
}

CTime CTime::operator += (int s) //返回s秒后的时间
{
CTime c;
c.second = second + s;
if(c.second >= 60)
{
c.minute = minute + c.second / 60;
{
if(c.minute >= 60)
{
c.hour = hour + c.minute / 60;
c.minute = c.minute % 60;
}
else
c.hour = hour;
}
c.second = c.second % 60;
}
else
{
c.minute = minute;
c.hour = hour;
}
return c;
}
CTime CTime::operator -= (int s)
{
CTime c;
int sec;
sec = second + minute * 60 + hour * 3600 - s;
c.hour = sec / 3600;
sec = sec % 3600;
c.minute = sec / 60;
sec = sec % 60;
c.second = sec;

return c;
}

实验结果截图：



实验心得：

好吧，我承认，在我的实验报告中经常会有一些奇怪的情况，时常会写出一些挺长的代码，可是，老师，不带这样的，还从来没写过那么那么那么长的一坨那。

算了抱怨就到这吧，还是写点有技术性的东西好了，老师说的也没错，虽然代码会很长，可是都是以前做过的东西，也有很多重复性的工作，有难住我的那，是在时间之上增加s秒和减少s秒的函数，因为考虑进位和借位的问题费了好多的功夫，结果，最后发现自己是多么的愚蠢，呵，璇子说的没错，一开始就把时间都化成秒，减完之后在化回时间不就好了嘛！所以啊，还是有学到好的东西。特别的，感觉到，越是长的代码，调理的重要性就越显的重要，不然很容易自己把自己困住手脚，
不能动弹，所以啊，做事也好，写代码也好，一定要思维清晰哦。

 
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标签：  c 360 system 工作
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