头插法 尾插法建立链表(带头节点、不带头节点)

头插法建立带头节点链表

void Createhead(linklist& l)//头插法带头节点
{
	l = new list;
	linklist p ;
	l->next = NULL;
	cout << "输入链表长度:"<
	int n;
	cin >> n;
	for (int i = 0; i < n; i++)
	{
		p = new list;
		cin >> p->data;
		p->next = l->next;
		l->next = p;
	}
}

尾插法建立带头节点链表

void Createrear(linklist& l)//尾插法
{
	l = new list;
	linklist p,r;
	l->next = NULL;
	r = l;
	cout << "输入链表长度:" << endl;
	int n;
	cin >> n;
	for (int i = 0; i < n; i++)
	{
		p = new list;
		cin >> p->data;
		p->next = NULL;
		r->next = p;
		r = p;
	}
}

头插法建立不带头节点链表

void Createlist1(linklist& l)//头插法不带头节点
{
	l = new list;
	linklist p;
	l->next = NULL;
	cout << "输入链表长度:" << endl;
	int n;
	cin >> n;
	cin >> l->data;
	for (int i = 1; i < n; i++)
	{
		p = new list;
		cin >> p->data;
		p->next = l;
		l = p;
	}
}

尾插法建立不带头节点链表

void Createlist2(linklist& l)//尾插法不带头节点
{
	l = new list;
	linklist p,q;
	l->next = NULL;
	cout << "输入链表长度:" << endl;
	int n;
	cin >> n;
	cin >> l->data;
	q = l;
	for (int i = 1; i < n; i++)
	{
		p = new list;
		cin >> p->data;
		q->next = p;
		q = p;
	}
}

完整代码：

#include
using namespace std;
typedef struct list
{
	int data;
	list* next;
}list, * linklist;
void Createhead(linklist& l)//头插法带头节点
{
	l = new list;
	linklist p ;
	l->next = NULL;
	cout << "输入链表长度:"<
	int n;
	cin >> n;
	for (int i = 0; i < n; i++)
	{
		p = new list;
		cin >> p->data;
		p->next = l->next;
		l->next = p;
	}
}
void Createrear(linklist& l)//尾插法
{
	l = new list;
	linklist p,r;
	l->next = NULL;
	r = l;
	cout << "输入链表长度:" << endl;
	int n;
	cin >> n;
	for (int i = 0; i < n; i++)
	{
		p = new list;
		cin >> p->data;
		p->next = NULL;
		r->next = p;
		r = p;
	}
}
void Createlist1(linklist& l)//头插法不带头节点
{
	l = new list;
	linklist p;
	l->next = NULL;
	cout << "输入链表长度:" << endl;
	int n;
	cin >> n;
	cin >> l->data;
	for (int i = 1; i < n; i++)
	{
		p = new list;
		cin >> p->data;
		p->next = l;
		l = p;
	}
}
void Createlist2(linklist& l)//尾插法不带头节点
{
	l = new list;
	linklist p,q;
	l->next = NULL;
	cout << "输入链表长度:" << endl;
	int n;
	cin >> n;
	cin >> l->data;
	q = l;
	for (int i = 1; i < n; i++)
	{
		p = new list;
		cin >> p->data;
		q->next = p;
		q = p;
	}
}
void Printlist1(linklist l)
{
	linklist p = l->next;
	while (p!=NULL)
	{
		cout << p->data << " ";
		p = p->next;
	}
	cout << endl;
}
void Printlist2(linklist l)
{
	linklist p = l;
	while (p != NULL)
	{
		cout << p->data << " ";
		p = p->next;
	}
	cout << endl;
}
int main()
{
	linklist L1,L2,L3,L4;
	cout << "头插法(带头节点)建立链表：" << endl;
	Createhead(L1);
	cout << "尾插法(带头节点)建立链表：" << endl;
	Createrear(L2);
	cout << "头插法(带头节点)链表：" << endl;
	Printlist1(L1);
	cout << "尾插法(带头节点)链表：" << endl;
	Printlist1(L2);
	cout << "头插法(不带头节点)建立链表：" << endl;
	Createlist1(L3);
	cout << "尾插法(不带头节点)建立链表：" << endl;
	Createlist2(L4);
	cout << "头插法(不带头节点)链表：" << endl;
	Printlist2(L3);
	cout << "尾插法(不带头节点)链表：" << endl;
	Printlist2(L4);
}