不带头结点的链表头插法C++实现

#include <iostream>

//不带头结点的链表的C++实现；

using namespace std;
typedef int DATA;
struct SNode
{
	DATA data;
	SNode* pNext;
};
struct SList
{
	SNode* m_pHead;
	SList()
	{
		m_pHead = NULL;//空链表;不带头结点；
	}
	~SList()
	{//析构函数对本类内的普通变量不需要清理，而是清理申请过得堆空间
		SNode* p = m_pHead, *p1;
		while (p)
		{
			p1 = p;
			p  = p->pNext;
			delete p1;
		}
	}
	void AddHead(DATA d)//头插法 添加节点
	{
		SNode* p = new SNode;
		p->data  = d;
		p->pNext = m_pHead;
		m_pHead  = p;

	}
	int GetCount()//获得节点数目
	{
		int i = 0;
		SNode *p = m_pHead;
		while(p)
		{
			i++;
			p=p->pNext;
		}

		return i;
	}
	void Delete()//删除节点
	{
		SNode*p = m_pHead;
		
		m_pHead = m_pHead->pNext;
		delete p;
	
	
	}
	void print()//打印链表数据
	{
		SNode *p = m_pHead;
		while (p)
		{
			cout<<p->data<<endl;
			p = p->pNext;
		}

	}

};
int main()
{
	SList list1,list2;
	while (true)
	{
		cout<<"请输入一个数据："<<endl;
		DATA d;
		cin>>d;
		cout<<"请输入存入的链表：(1 or 2)"<<endl;
		int i = 0;
		cin>>i;
		if (i == 0)
		{
			break;
		}
		if (i == 1)
		{
			list1.AddHead(d);
		}
		if (i == 2)
		{
			list2.AddHead(d);
		}

		cout<<"list1中的个数为："<<list1.GetCount()<<endl;
		cout<<"list2中的个数为："<<list2.GetCount()<<endl;
	}

	list1.Delete();
	list1.Delete();
	list1.print();

	return 0;
}