Qt使用std::sort进行排序

参考：

https://blog.csdn.net/u013346007/article/details/81877755

https://www.linuxidc.com/Linux/2017-01/140078.htm

https://www.cnblogs.com/gccbuaa/p/7111480.html

sort和stable_sort都是全排序函数，但是sort是非稳定排序算法，而stable_sort是稳定排序算法。

#include "paixu.h"
#include <qstring.h>

struct MyStruct
{
    int id;
    QString name;
};

using namespace std;

bool bigger_than(const MyStruct& s1, MyStruct& s2)
{
    return (s1.id > s2.id);
}

bool little_than(const MyStruct& s1, MyStruct& s2)
{
    return (s1.id <= s2.id);
}

paixu::paixu(QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);

    QList<MyStruct> m_list;
    MyStruct ms1; ms1.id = 10; ms1.name = "10";
    MyStruct ms2; ms2.id = 110; ms2.name = "110";
    MyStruct ms3; ms3.id = 100; ms3.name = "100";
    MyStruct ms4; ms4.id = 120; ms4.name = "120";
    MyStruct ms5; ms5.id = 104; ms5.name = "104";
    MyStruct ms6; ms6.id = 108; ms6.name = "108";
    MyStruct ms7; ms7.id = 109; ms7.name = "109";

    m_list.append(ms1);
    m_list.append(ms2);
    m_list.append(ms3);
    m_list.append(ms4);
    m_list.append(ms5);
    m_list.append(ms6);
    m_list.append(ms7);

    std::sort(m_list.begin(), m_list.end(), bigger_than);
    int a = 100;

    std::sort(m_list.begin(), m_list.end(), little_than);
    a = 100;

}

paixu::~paixu()
{

}