conio.h不是C标准库中的头文件，是console input/output（控制台输入输出）的简写，其中定义了通过控制台进行数据录入和输出的函数，主要是一些用户通过键盘产生的

对应操作，例如getch()函数等。

<pre name="code" class="cpp">// 13_1_linklist.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <iostream>
using namespace std;

typedef struct student
{
	int data;
	struct student *next;
}node;

//建立
node *create()
{
	int x,cycle = 1;
	node *p,*s,*head;
	head = (node *)malloc(sizeof(node));
	p = head;
	while (cycle)
	{
		cout << "Please input an integer:" << endl;
		cin >> x;
		if (x != 0)
		{
			s = (node *)malloc(sizeof(node));
			s->data = x;
			cout << "\n" << s->data << endl;
			p->next = s;
			p = s;
		}
		else
			cycle = 0;
	}
	head = head->next; //head的next是我们需要的链表的头结点， 因为head（p）的next指向了第一次输入的s
	p->next = NULL;
	cout << head->data << endl;
	return head;
}

//测长
int length(node *head)
{
	int n = 0;
	node *p;
	p = head;
	while (p != NULL)
	{
		p = p->next;
		n++;
	}
	return n;
}

//打印
void print(node *head)
{
	node *p;
	if (head != NULL)
	{
		p = head;
		while (p != NULL)
		{
			cout << p->data << endl;
			p = p->next;
		}
	}
}

//删除
node *del(node *head,int num)
{
	node *p1,*p2;
	p2 = p1 = head; //防止p2未被初始化就使用
	while (num != p1->data && p1->next != NULL)
	{
		p2 = p1;
		p1 = p1->next;
	}

	if (num == p1->data)
	{
		if (p1 == head) //删除的是头节点，将head指针指向头结点的下一节点 并free p1
		{
			head = p1->next;
			free(p1);
		}
		else //删除的是非头节点，将p2的next指向p1的next，并free p1
		{
			//p2 = p1;
			p2->next = p1->next;
			free(p1);
		}
	}

	return(head);
}

//插入，分为头节点， 尾节点， 中间节点三种情况插入
node *insert(node *head,int num)
{
	node *p0,*p1,*p2;
	p0 = (node*)malloc(sizeof(node));
	p0->data = num;
	p2 = p1 = head;
	while (p1->data < num && p1->next != NULL)
	{
		p2 = p1;
		p1 = p1->next;
	}

	if (p1->data >= num)
	{
		if (p1 == head)//插入在头节点前，使p0的next指向头结点，再将p0赋给head 
		{
			p0->next = p1;
			head = p0;
		}
		else//中间节点
		{
			p2->next = p0;
			p0->next = p1;
		}
	}

	else//num大于等于链表里所有数值，插入到尾节点之后
	{
		p1->next = p0;
		p0->next = NULL;
	}
	return head;
}

//排序
node *sort(node *head)
{
	node *p;
	int temp;
	int len = length(head);
	p = head;
	if (NULL == head || NULL == head->next)
	{
		return head;
	}

	for (int i = 0; i < len - 1; i++)
	{
		p = head;// 每一次嵌套for循环结束后，p都指向了尾节点，需要重新将p指向头节点才能进行下一次循环
		for (int j = i + 1; j < len; j++)
		{
			if (p->data > p->next->data)
			{
				temp = p->data;
				p->data = p->next->data;
				p->next->data = temp;
			}
			p = p->next;
		}
	}
	return head;
}

//逆置
node *reverse(node *head)
{
	node *p1,*p2,*p3;
	p1 = head;
	p2 = p1->next;
	if (NULL == head || NULL == head->next)
	{
		return head;
	}

	while (p2)
	{
		p3 = p2->next;
		p2->next = p1;

		p1 = p2;
		p2 = p3;//将p2赋给p1，p3赋给p2，进入下一次循环
	}

	head->next = NULL;
	head = p1;
	return head;
}

int _tmain()
{
	int val = 10;
	node *link_list = create();
	int len = length(link_list);
	cout << "The length of link_list is: " << len << "\n" << endl;
	printf("The original link list is:\n");
	print(link_list);

	node *del_link_list = del(link_list,val);
	printf("The deleted link list is:\n");
	print(del_link_list);

	node *sorted_link_list = sort(del_link_list);
	printf("THe sorted link list is: \n");
	print(sorted_link_list);

	node *inserted_link_list = insert(sorted_link_list,val);
	printf("The inserted link list is:\n");
	print(inserted_link_list);

	node *reversed_link_list = reverse(inserted_link_list);
	printf("The reversed link list is: \n");
	print(reversed_link_list);
	return 0;
}

The length of link_list is: 5The original link list is:257111The deleted link list is:257111THe sorted link list is:125711The inserted link list is:12571011The reversed link list is:11107521 原文链接：https://www.f2er.com/datastructure/383041.html