c++primer plus清单11.4,11.5,11.6

最新推荐文章于 2021-11-06 15:44:23 发布

qq_34600560

最新推荐文章于 2021-11-06 15:44:23 发布

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本文链接：https://blog.youkuaiyun.com/qq_34600560/article/details/84261182

本文详细介绍了使用C++实现一个时间类的过程，包括类的设计、构造函数、成员函数如加小时数、加分钟数、重置时间、时间相加操作符重载以及显示时间的功能。通过实例演示了如何使用该类来处理时间的加法运算。

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首先清单11.4
#ifndef MYTIME_H_
#define MYTIME_H_
class Time
{
private:
int hours;
int minutes;
public:
Time();
Time(int h, int m = 0);
void AddMin(int h = 0, int m = 0);
void AddHr(int h);
void Reset(int h = 0, int m = 0);
Time operator+(const Time &t)const;
void Show()const;

};
#endif
清单11.5
#include “stdafx.h”
#include
#include “mytime.h”

Time::Time()
{
hours = minutes = 0;
}

Time::Time(int h, int m)
{
hours = h;
minutes = m;
}

void Time::AddMin(int h, int m)
{
minutes += m;
hours += minutes / 60;
minutes %= 60;
}

void Time::AddHr(int h)
{
hours += h;
}

void Time::Reset(int h, int m)
{
hours = h;
minutes = m;
}

Time Time::operator+(const Time & t) const
{
Time sum;
sum.minutes = minutes + t.minutes;
sum.hours = hours + t.hours + sum.minutes / 60;
sum.minutes %= 60;
return sum;
}
void Time::Show() const
{
std::cout << hours << “hours,” <<minutes<<“minutes ,” ;
}

最后11.6
// 11月192.cpp: 定义控制台应用程序的入口点。
//
#include “stdafx.h”
#include
#include “mytime.h”
using namespace std;
int main()
{
using std::cout;
using std::endl;
Time planning;
Time cording(2, 40);
Time fixing(5, 55);
Time total;
cout << “planing time =”;
planning.Show();
cout << endl;
cout << “cording time =”;
cording.Show();
cout << endl;
cout << “fixing time =”;
fixing.Show();
cout << endl;
total = cording+fixing;
cout << “cording+fixing=”;
total.Show();
cout << endl;
cin.get();
return 0;
}