代码贴--链表--数据机构

本博客将记录链表代码(单链表)，后续其他链表和其他数据结构内容请看我的其他博客

头文件(SList.h)

#pragma once
#include<iostream>
#include<bits/stdc++.h>
using namespace std;

typedef int SLTDataType;

struct SListNode
{
	int data;
	struct SListNode* next;
};

typedef struct SListNode SLTNode;

void SListPrint(SLTNode* phead);
SLTNode* BuySListNode(SLTDataType x);
void SListPushBack(SLTNode*& pphead, SLTDataType x);
void SListPushFront(SLTNode*& phead, SLTDataType x);
void SListPopBack(SLTNode*& phead);
void SListPopFront(SLTNode*& phead);
SLTNode* SListFind(SLTNode*& phead, SLTDataType x);

void SListInsert(SLTNode*& phead, SLTNode* pos, SLTDataType x);
void SListErase(SLTNode*& phead, SLTNode* pos);

源文件(SList.cpp)

#include"SList.h"

void SListPrint(SLTNode* phead)
{
	SLTNode* cur = phead;
	while (cur != NULL)
	{
		cout << cur->data << "->";
		cur = cur->next;
	}
	cout << "NULL" << endl;
}

SLTNode* BuySListNode(SLTDataType x)
{
	SLTNode* newnode = (SLTNode*)malloc(sizeof(SLTNode));
	newnode->data = x;
	newnode->next = NULL;
	return newnode;
}

void SListPushBack(SLTNode*& phead, SLTDataType x)//注意是引用或者指针的指针！！！
{
	SLTNode* newnode = BuySListNode(x);

	if (phead == NULL)
	{
		phead = newnode;
	}
	else
	{
		//找尾节点的指针
		SLTNode* tail = phead;
		while (tail->next != NULL)
		{
			tail = tail->next;
		}

		//尾节点，链接新节点
		tail->next = newnode;
	}
}
void SListPushFront(SLTNode*& phead, SLTDataType x)
{
	SLTNode* newnode = BuySListNode(x);
	newnode->next = phead;
	phead = newnode;


}
void SListPopFront(SLTNode*& phead)
{
	SLTNode* next = phead->next;
	free(phead);
	phead = next;
}
void SListPopBack(SLTNode*& phead)
{
	if (phead == NULL)//空
	{
		return;
	}
	else if (phead->next == NULL)//一个节点
	{
		free(phead);
		phead = NULL;
	}
	else//一个以上的节点
	{
		SLTNode* prev = NULL;
		SLTNode* tail = phead;
		while (tail->next != NULL)
		{
			prev = tail;
			tail = tail->next;
		}
		tail->next = NULL;
		free(tail);
		prev->next = NULL;
	}
}

SLTNode* SListFind(SLTNode*& phead, SLTDataType x)
{
	SListNode* cur = phead;
	//while(cur!=NULL)
	while (cur)
	{
		if (cur->data == x)
		{
			return cur;
		}
			cur = cur->next;
	}
	return NULL;
}


//在pos的前面插入x
void SListInsert(SLTNode*& phead, SLTNode* pos, SLTDataType x)
{
	if (pos == phead)//判断是否是头插
	{
		SListPushFront(phead, x);
	}
	else
	{
		SLTNode* prev = phead;
		while (prev->next != pos)
		{
			prev = prev->next;
		}
		SLTNode* newnode=BuySListNode(x);
		prev->next = newnode;
		newnode ->next= pos;
	}
}

//删除pos位置的值
void SListErase(SLTNode*& phead,SLTNode* pos)
{
	if (pos ==phead)//判断是不是头删
	{
		SListPopFront(phead);
	}
	else
	{
		SLTNode* prev = phead;
		while (prev->next!=pos)
		{
			prev = prev ->next;
		}
		prev->next = pos->next;
		free(pos);
	}
}

测试文件(Test.cpp)

#include"SList.h"

void TestSList1()
{
	SLTNode* phead = NULL;
	SListPushBack(phead, 1);
	SListPushBack(phead, 2);
	SListPushBack(phead, 3);
	SListPushBack(phead, 4);
	SListPrint(phead);

	SListPushFront(phead, 0);
	SListPrint(phead);

	SListPushFront(phead, -1);
	SListPopFront(phead);
	SListPopFront(phead);
	SListPrint(phead);

	SListPopBack(phead);
	SListPopBack(phead);
	SListPrint(phead);
	
	//在1前面加一个10
	SLTNode* pos1 = SListFind(phead,1);
	SListInsert(phead, pos1, 10);
	SLTNode* pos2 = SListFind(phead, 2);
	SListInsert(phead, pos2, 20);
	SLTNode* pos3 = SListFind(phead, 3);
	SListInsert(phead, pos3, 30);
	SListPrint(phead);

	SLTNode* pos10 = SListFind(phead, 10);
	SListErase(phead, pos10);
	SLTNode* pos20 = SListFind(phead, 20);
	SListErase(phead, pos20);
	SListPrint(phead);
}

int main()
{
	TestSList1();
	
	return 0;
}

代码演示