数据结构day05（单链表）

今日任务：

 思维导图：

实现 代码：（多文件）

head.h

#ifndef __HEAD_H__
#define __HEAD_H__

#include 
#include 
#include 
typedef int datatype;

typedef struct Linklist
{
	union {
		int len;
		datatype data;
	};
	struct Linklist* next;
}Node,*NodeP;
NodeP head_create();
NodeP create();
int output(NodeP head);
int tail_insert(NodeP head,datatype data);
int head_insert(NodeP head,datatype data);
int tail_delete(NodeP head);
int head_delete(NodeP head);
int pos_insert(NodeP head,datatype data,int pos);
int pos_delete(NodeP head,int pos);
int pos_update(NodeP head,datatype data,int pos);
int value_index(NodeP head,datatype data);
int value_delete(NodeP head,datatype data);
int inversion(NodeP head);
int free_linklist(NodeP head);
#endif

fun.c

#include "head.h"
/*
 * function:   传参 空指针判定
 * @param [ in] 
 * @param [out] 
 * @return      
 */
int void_point(NodeP p){
	if(NULL==p){
		puts("how dare you give me null point.");
		return -1;
	}
	return 0;
}
/*
 * function:    头结点创建
 * @param [ in] 
 * @param [out] 
 * @return      
 */
NodeP head_create(){
	NodeP head=(NodeP)malloc(sizeof(Node));
	if(head==NULL){
		puts("how dare you give me null place.");
		return NULL;
	}
	head->len=0;
	head->next=NULL;
	return head;
}
/*
 * function:    节点创建
 * @param [ in] 
 * @param [out] 
 * @return      
 */
NodeP create(datatype data){
	NodeP new=(NodeP)malloc(sizeof(Node));
	if(new==NULL){
		puts("how dare you give me null place.");
		return NULL;
	}
	new->data=data;
	new->next=NULL;
	return new;
}
/*
 * function:    输出
 * @param [ in] 
 * @param [out] 
 * @return      
 */
int output(NodeP head){
	if(void_point(head))
		return -1;
	while(head->next!=NULL){
		printf("%d\t",head->next->data);
		head=head->next;
	}
	puts("output done.");
}
/*
 * function:    节点尾插
 * @param [ in] 
 * @param [out] 
 * @return      
 */
int tail_insert(NodeP head,datatype data){
	if(void_point(head))
		return -1;
	//找到尾部节点
	NodeP p=head;
	while(p->next!=NULL)
		p=p->next;
	p->next=create(data);
	head->len++;
	puts("tail insert success.");
	return 0;
}
/*
 * function:    节点头插
 * @param [ in] 
 * @param [out] 
 * @return      
 */
int head_insert(NodeP head,datatype data){
	if(void_point(head))
		return -1;
	NodeP new=create(data);
	new->next=head->next;
	head->next=new;
	head->len++;
	puts("head insert success");
}
/*
 * function:    尾删
 * @param [ in] 
 * @param [out] 
 * @return      
 */
int tail_delete(NodeP head){
	if(void_point(head))
		return -1;
	if(head->next==NULL){
		puts("there is no assigment to delete.");
		return -1;
	}
	//找到最后一个节点，free并len--，前一节点指向null
	NodeP p=head;
	while(p->next->next!=NULL)
		p=p->next;
	free(p->next);
	p->next=NULL;
	head->len--;
	puts("tail delete success");
	return 0;
}
/*
 * function:    头删
 * @param [ in] 
 * @param [out] 
 * @return      
 */
int head_delete(NodeP head){
	if(void_point(head))
		return -1;
	if(head->next==NULL){
		puts("there is no assigment to delete.");
		return -1;
	}
	NodeP p=head->next;
	free(head->next);
	head->next=p->next;
	p=NULL;
	head->len--;
	puts("head delete success");
	return 0;
}
/*
 * function:    指定位置添加
 * @param [ in] 
 * @param [out] 
 * @return      
 */
int pos_insert(NodeP head,datatype data,int pos){

	if(void_point(head))
		return -1;
	if(pos>head->len+1||pos<1){
		puts("your position is illegal.");
		return -1;
	}
	NodeP p=head;
	while(pos--!=1)
		p=p->next;
	NodeP new=create(data);
	new->next=p->next;
	p->next=new;
	head->len++;
	puts("pos insert success");
}
/*
 * function:    指定位置删除
 * @param [ in] 
 * @param [out] 
 * @return      
 */
int pos_delete(NodeP head,int pos){
	if(void_point(head))
		return -1;
	if(pos<1||pos>head->len){
		puts("your position is illegal.");
		return -1;
	}
	NodeP p=head;
	while(pos--!=1)
		p=p->next;
	NodeP x=p->next;
	p->next=p->next->next;
	free(x);
	x=NULL;
	head->len--;
	puts("pos delete success");
	return 0;
}
/*
 * function:    指定位置修改
 * @param [ in] 
 * @param [out] 
 * @return      
 */
int pos_update(NodeP head,datatype data,int pos){
	if(void_point(head))
		return -1;
	if(pos<1||pos>head->len){
		puts("your position is illegal.");
		return -1;
	}
	NodeP p=head;
	while(pos--)
		p=p->next;
	p->data=data;
	puts("pos update success");
	return 0;
}
/*
 * function:    按值查找下表
 * @param [ in] 
 * @param [out] 
 * @return      
 */
int value_index(NodeP head,datatype data){
	if(void_point(head))
		return -1;
	if(head->len==0){
		puts("linklist is null");
		return -1;
	}
	int index=0;
	NodeP p=head;
	while(p->next!=NULL){
		p=p->next;
		index++;
		if(p->data==data){
			printf("the index your want to find is%d\n",index);
			return index;
		}
	}
	puts("can't find your value");
	return 0;
}
/*
 * function:    按值删除
 * @param [ in] 
 * @param [out] 
 * @return      
 */
int value_delete(NodeP head,datatype data){
	if(void_point(head))
		return -1;
	if(head->len==0){
		puts("linklist is null");
		return -1;
	}
	NodeP p=head;
	while(p->next!=NULL){
		if(p->next->data==data){
			pos_delete(head,value_index(head,data));
			puts("value delete success");
			return 0;
		}
		p=p->next;
	}
	puts("no value your want to delete");
}
/*
 * function:    循环逆置
 * @param [ in] 
 * @param [out] 
 * @return      
 */
int inversion(NodeP head){
	if(void_point(head))
		return -1;
	if(head->len==0){
		puts("linklist is NULL");
		return -1;
	}
	if(head->len==1){
		puts("there is no deed");
		return 0;
	}
	//逆置
	//将第二个节点作为尾节点,但是得先记录一下，还得用于每次循环的头插的第一个元素
	NodeP p=head->next->next;
	head->next->next=NULL;
	//定义一个节点,用于方便循环调用后面的元素头插,
	NodeP k=p;
	puts("debug..");
	output(p);
	while(p!=NULL){
		p=p->next;

		k->next=head->next;
		head->next=k;

		k=p;
	}
	puts("inversion success.");
	return 0;
}
/*
 * function:    释放链表
 * @param [ in] 
 * @param [out] 
 * @return      
 */
int free_linklist(NodeP head){
	if(void_point(head))
		return -1;
	NodeP p=NULL;
	while(head!=NULL){
		p=head;
		head=head->next;
		free(p);
		p=NULL;
	}
	puts("free success.");
	return 0;
}

main.c

#include "head.h"
int main(int argc, const char *argv[])
{
	NodeP p=head_create();
	tail_insert(p,10);
	tail_insert(p,20);
	tail_insert(p,30);
	tail_insert(p,40);
	tail_insert(p,50);
	head_insert(p,99);
	head_insert(p,88);
	output(p);
	//pos_insert(p,66,0);
	//output(p);
	//pos_delete(p,8);
	//output(p);
	//pos_update(p,66,8);
	//output(p);
	//tail_delete(p);
	//output(p);
	//head_delete(p);
	//output(p);
	//value_delete(p,77);
	//output(p);
	//inversion(p);
	//output(p);
	free_linklist(p);
	p=NULL;
	return 0;
}

不好，眼花了，没看到实现单项循环链表，ji