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C++，STL 042（24.10.21）

article 2024/10/25 19:18:02

内容

一道练习题。

（涉及list，sort）

题目（大致）

将Person自定义类型进行排序（Person中属性有姓名、年龄、身高），按照年龄进行升序，如果年龄相同则按照身高进行降序。

运行代码

#include <iostream>
#include <string>
#include <list>

using namespace std;

class Person
{
public:
    string m_Name;
    int m_Age;
    int m_Height;

public:
    Person(string name, int age, int height)
    {
        this->m_Name = name;
        this->m_Age = age;
        this->m_Height = height;
    }
};

bool comparePerson(Person &p1, Person &p2)
{
    if (p1.m_Age == p2.m_Age)
    {
        return p1.m_Height > p2.m_Height;
    }
    else
    {
        return p1.m_Age < p2.m_Age;
    }
}

void test01()
{
    list<Person> l;

    Person p1("p1", 23, 166);
    Person p2("p2", 23, 156);
    Person p3("p3", 23, 178);
    Person p4("p4", 33, 172);
    Person p5("p5", 43, 190);
    Person p6("p6", 45, 175);

    l.push_back(p1);
    l.push_back(p2);
    l.push_back(p3);
    l.push_back(p4);
    l.push_back(p5);
    l.push_back(p6);

    cout << "排序前：" << endl;
    for (list<Person>::iterator it = l.begin(); it != l.end(); it++)
    {
        cout << it->m_Name << " " << it->m_Age << " " << it->m_Height << endl;
    }

    l.sort(comparePerson);

    cout << "排序后：" << endl;
    for (list<Person>::iterator it = l.begin(); it != l.end(); it++)
    {
        cout << it->m_Name << " " << it->m_Age << " " << it->m_Height << endl;
    }
}

int main()
{
    test01();

    return 0;
}