数据结构(1) -- 线性结构

1、顺序存储

//List.h
#ifndef LIST_H_
#define LIST_H_

#define MAXSIZE 100
typedef struct _Poly
{
    int a;
    int n;
    bool operator == (_Poly e)
    {
        if (a == e.a && n == e.n)
            return true;
        else
            return false;
    }
}Poly;

#define ElemType Poly

typedef struct _Node
{
    ElemType data[MAXSIZE];
    int last;
}Node;

class List
{
private:
    Node *data;
public:
    List();
    ~List();
    void Insert(ElemType e, int index);
    void Remove(int index);
    int Find(ElemType e);
    ElemType FindKth(int k);
    int Length();
};
#endif

//List.cpp
#include "List.h"
#include <iostream>

List::List()
{
    data = new Node();
    data->last = -1;
}

List::~List()
{
    delete data;
}

void List::Insert(ElemType e, int index)
{
    if (data->last == MAXSIZE - 1)
    {
        std::cout << "表满了" << std::endl;
        return;
    }
    if (index < 0 || index >(data->last + 1))
    {
        std::cout << "添加位置不合法" << std::endl;
        return;
    }
    for (int i = data->last; i >= index; i--)
    {
        data->data[i + 1] = data->data[i];
    }
    data->data[index] = e;
    data->last++;
}


void  List::Remove(int index)
{
    if (index < 0 || index > data->last)
    {
        std::cout << "删除位置不和法" << std::endl;
        return;
    }

    for (int i = index; i < data->last; i++)
    {
        data->data[i] = data->data[i + 1];
    }
    data->last--;
}

int  List::Find(ElemType e)
{
    for (int i = 0; i < data->last; i++)
    {
        if (data->data[i] == e)
            return i;
    }
    return -1;
}
ElemType  List::FindKth(int k)
{
    if (k < 0 || k > data->last)
    {
        std::cout << "查找位置不合法" << std::endl;
    }
    return data->data[k];
}
int  List::Length()
{
    return (data->last + 1);
}

2、链式存储

//PList.h
#ifndef PLIST_H_
#define PLIST_H_

#define MAXSIZE 100
typedef struct _Poly
{
    int a;
    int n;
    bool operator == (_Poly e)
    {
        if (a == e.a && n == e.n)
            return true;
        else
            return false;
    }
}Poly;

#define ElemType Poly

typedef struct _PNode
{
    ElemType data;
    _PNode* next;
}PNode;

class PList
{
private:
    PNode *head;
public:
    PList();
    ~PList();
    void Insert(ElemType e, int index);
    void Remove(int index);
    int Find(ElemType e);
    ElemType FindKth(int k);
    int Length();
};
#endif

//PList.cpp
#include "PList.h"
#include <iostream>

PList::PList()
{
    head = new PNode();
    head->next = NULL;
}

PList::~PList()
{
    delete head;
}

void PList::Insert(ElemType e, int index)
{
    PNode *p = head;
    PNode *s = new PNode();
    s->data = e;
    s->next = NULL;
    if (index > Length())
        std::cout << "插入位置错误" << std::endl;

    int i = 0;
    while (p && i < index)
    {
        p = p->next;
        i++;
    }
    s->next = p->next;
    p->next = s;
}


void  PList::Remove(int index)
{
    PNode *p = head;
    PNode *s = new PNode();
    if (index > Length())
        std::cout << "移除位置错误" << std::endl;

    int i = 0;
    while (p && i < index)
    {
        p = p->next;
        i++;
    }
    s = p->next;
    p->next = s->next;
    delete s;
}

int  PList::Find(ElemType e)
{
    PNode *p = head;
    int i = 0;
    while (p)
    {
        if (p->data == e)
            return i;
        i++;
        p = p->next;
    }
    return -1;
}
ElemType  PList::FindKth(int k)
{
    PNode *p = head;
    if (k < 0 || k > Length())
    {
        std::cout << "查找位置不合法" << std::endl;
    }
    int i = 0;
    while (p && i < k)
    {
        p = p->next;
        i++;
    }
    return p->next->data;
}
int  PList::Length()
{
    PNode *p = head;
    int i = 0;
    while (p)
    {
        i++;
        p = p->next;
    }
    return i;
    
}

3、测试用例

//main.cpp
#include <iostream>
#include <stdlib.h>
#include "PList.h"
using namespace std;


int main()
{
    PList L;
    for (int i = 0; i < 5; i++)
    {
        Poly t = { i, i };
        L.Insert(t, i);
    };
    cout << "last:" << L.Length() << endl;
    Poly e = { 2, 2 };
    cout << "Find return:" << L.Find(e) << endl;
    for (int i = 0; i < 4; i++)
    {
        cout << L.FindKth(i).a << "X" << L.FindKth(i).n  << " + ";
    }
    cout << L.FindKth(4).a << "X" << L.FindKth(4).n << endl;
    system("pause");
    return 0;
}