1.编程实现单向循环链表的头插,头删、尾插、尾删
尾插/头插,头删,尾删:
头文件:
#ifndef __HEAD_H_
#define __HEAD_H_
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
enum {FALSE=-1,SUCCESS};
typedef int datatype;
typedef struct node
{
//数据域
datatype data;
//指针域
struct node *next;
}*linklist;
linklist creat();
linklist insert_head(linklist head,datatype element);
void output(linklist head);
linklist insert_rear(linklist head,datatype element);
linklist delete_head(linklist head);
linklist delete_rear(linklist head);
#endif
主函数:
#include"head.h"
int main(int argc, const char *argv[])
{
//头插
linklist head=NULL;
int n;
printf("please enter n:");
scanf("%d",&n);
datatype element;
for(int i=0;i<n;i++)
{
printf("please enter %d element:",i+1);
scanf("%d",&element);
//头插
head=insert_head(head,element);
//尾插
// head=insert_rear(head,element);
}
output(head);
//头删
head=delete_head(head);
output(head);
//尾删
head=delete_rear(head);
output(head);
return 0;
}
自定义函数:
#include"head.h"
int main(int argc, const char *argv[])
{
//头插
linklist head=NULL;
int n;
printf("please enter n:");
scanf("%d",&n);
datatype element;
for(int i=0;i<n;i++)
{
printf("please enter %d element:",i+1);
scanf("%d",&element);
//头插
head=insert_head(head,element);
//尾插
// head=insert_rear(head,element);
}
output(head);
//头删
head=delete_head(head);
output(head);
//尾删
head=delete_rear(head);
output(head);
return 0;
}
ubuntu@ubuntu:~/寒假作业/2.3$ cat test.c
#include"head.h"
linklist creat()
{
linklist head=(linklist)malloc(sizeof(struct node));
if(head==NULL)
return NULL;
head->data=0;
head->next=head;
return head;
}
//头插
linklist insert_head(linklist head,datatype element)
{
linklist s=creat();
s->data=element;
if(head==NULL)
{
head=s;
return head;
}
linklist p=head;
while(p->next!=head)
p=p->next;
s->next=head;
head=s;
p->next=head;
return head;
}
void output(linklist head)
{
linklist s=head;
do
{
printf("%-4d",s->data);
s=s->next;
}while(s!=head);
puts("");
}
//尾插
linklist insert_rear(linklist head,datatype element)
{
linklist s=creat();
s->data=element;
linklist p=head;
if(head==NULL)
{
head=s;
return head;
}
while(p->next!=head)
p=p->next;
p->next=s;
s->next=head;
return head;
}
//头删
linklist delete_head(linklist head)
{
if(head==NULL)
return head;
linklist del=head;
linklist p=head;
while(p->next!=head)
p=p->next;
head=head->next;
p->next=head;
free(del);
del=NULL;
return head;
}
//尾删
linklist delete_rear(linklist head)
{
if(head==NULL)
return head;
linklist p=head;
if(head->next==head)
{
free(head);
head=NULL;
return head;
}
while(p->next->next!=head)
p=p->next;
linklist del=p->next;
p->next=head;
free(del);
del=NULL;
return head;
}
2.编程实现单向循环链表约瑟夫环
约瑟夫环:用循环链表编程实现约瑟夫问题
n个人围成一圈,从某人开始报数1,2,.., m,数到m的人出圈,然后从出圈的下一个人(m+1)开始重复此过程
直到 全部人出圈,于是得到一个出圈人员的新序列
如当n=8,m=4时,若从第一个位置数起,则所得到的新的序列 为4,8,5,2,1,3,7,6