容器链表list的学习

视频：

https://www.bilibili.com/video/BV1TG411A7sZ?spm_id_from=333.788.videopod.episodes&vd_source=e5ef53bcd02c60bc6cb52e706517483f&p=11

#include
using namespace std;

#include

void printl(listl)
{
	list::iterator it=l.begin();
	while(it!=l.end())
	{
		cout<<*it<<" ";
		it++;
	}
	cout<l,l2;
	for(int i=1;i<=3;i++)l.push_back(i);
	for(int i=4;i<=6;i++)l.push_front(i);
	cout<<"l=";printl(l);
	l2=l;
	cout<<"l2=";printl(l2);
	listl3(l);
	cout<<"l3=";printl(l3);
	
	cout<<"l.front()="<