qfedu-cpp-level/day9/stl_stack_demo/d2.cpp

#include <iostream>
#include <stack>
#include <vector>

using namespace std;

class Date
{
    // 重载 << 以显示日期
    friend ostream &operator<<(ostream &out, const Date &date)
    {
        out << date.year << "年" << date.month << "月" << date.day << "日";
        return out;
    }

private:
    int year;
    int month;
    int day;

public:
    Date(int y, int m, int d) : year(y), month(m), day(d) {}

public:
    bool operator<(const Date &date) const
    {
        // if (year < date.year)
        // {
        //     return true;
        // }
        // else if (year == date.year)
        // {
        //     if (month < date.month)
        //     {
        //         return true;
        //     }
        //     else if (month == date.month)
        //     {
        //         if (day < date.day)
        //         {
        //             return true;
        //         }
        //     }
        // }
        // return false;
        return year < date.year ||
               (year == date.year && month < date.month) ||
               (year == date.year && month == date.month && day < date.day);
    }
    bool operator>(const Date &date) const
    {
        return year > date.year && month > date.month && day > date.day;
    }
};

class Worker
{
    friend Worker &operator=(const Worker &other);
    // {
    //     if (this != &other)
    //     {
    //         name = other.name;
    //         hire_date = other.hire_date;
    //         volume = other.volume;
    //     }
    //     return *this;
    // }

private:
    string name;    // 姓名
    Date hire_date; // 入职日期
    double volume;  // 业绩

public:
    Worker(const string &name, const Date &hire_date, double volume)
        : name(name), hire_date(hire_date), volume(volume) {}
    Worker(const Worker &other)
    {
        name = other.name;
        hire_date = other.hire_date;
        volume = other.volume;
    }
    ~Worker()
    {
        cout << "析构函数被调用" << endl;
    }

public:
    void show()
    {
        cout << "name = " << name << ", hire_date = " << hire_date << ", volume = " << volume << endl;
    }
};

Worker &operator=(const Worker &other)
{
    name = other.name;
    hire_date = other.hire_date;
    volume = other.volume;
}

void sortByHireDate(Worker *p, int size)
{
    for (int i = 0; i < size - 1; i++)
        int min = i;
    for (int j = i + 1; j < size; i++)
    {
        if (p[min].hire_date > p[j].hire_date)
        {
            min = j;
        }
    }
    if (min != i)
    {
        swap(p[min], p[i]);
        // Worker tmp = p[i]; // 拷贝构造
        // p[i] = p[min];     // operator= 重载
        // p[min] = tmp;
    }
}

void sortByVolume(Worker *p, int size)
{
}

int main()
{
    Worker w1("disen", Date(2020, 1, 15), 1000);
    Worker w2("zhangsan", Date(2020, 1, 16), 200);
    Worker w3("lisi", Date(2020, 2, 17), 400);
    Worker w4("wangwu", Date(2020, 2, 18), 900);
    Worker w5("zhaoliu", Date(2020, 2, 18), 100);

    Worker wrks[] = {w1, w2, w3, w4, w5};

    sortByHireDate(wrks, 5); // 先排序

    // vector<Worker> vec;
    // vec.assign(wrks, wrks + 5);

    w1.show();
}