C++STL排序案例
案例描述:将Person自定义数据类型进行排序,Person中属性有姓名、年龄、身高
排序规则:按照年龄进行升序,如果年龄相同按照身高进行降序
代码示例:
#include<iostream>
#include<list>
#include<string>
using namespace std;
class Person
{
public:
Person(string name,int age,int height)
{
this->m_Name = name;
this->m_Age = age;
this->m_Height = height;
}
string m_Name; //姓名
int m_Age; //年龄
int m_Height; //身高
};
bool comparePerson(Person &p1, Person &p2)
{
//按照年龄 升序
if (p1.m_Age == p2.m_Age)
{
//年龄相同,按照身高降序
return p1.m_Height > p2.m_Height;
}
else
{
return p1.m_Age < p2.m_Age;
}
}
void test01()
{
list<Person>L; //创建容器
//准备数据
Person p1("刘备", 35, 175);
Person p2("曹操", 45, 180);
Person p3("孙权", 40, 170);
Person p4("赵云", 25, 190);
Person p5("张飞", 35, 160);
Person p6("关羽", 35, 200);
//插入数据
L.push_back(p1);
L.push_back(p2);
L.push_back(p3);
L.push_back(p4);
L.push_back(p5);
L.push_back(p6);
for (list<Person>::iterator it = L.begin(); it != L.end(); it++)
{
cout << "姓名:" << (*it).m_Name
<< " 年龄:" << it->m_Age
<< " 身高:" << it->m_Height << endl;
}
//排序
cout << "-----------------------------------" << endl;
cout << "排序后" << endl;
L.sort(comparePerson);
for (list<Person>::iterator it = L.begin(); it != L.end(); it++)
{
cout<<"姓名:"<<(*it).m_Name
<< " 年龄:" << it->m_Age
<< " 身高:" << it->m_Height << endl;
}
}
int main()
{
test01();
return 0;
}
总结:
*
对于自定义数据类型,必须要指定排序规则,否则编译器不知道如何进行排序
高级排序只是在排序规则尚在进行一次逻辑规则制定,并不复杂