线性表基础

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <windows.h>
#define LIST_INIT_SIZE 100
#define MAXSIZE 100
#define LISTINCREMENT
#define OK 1
#define OVERFLOW -1
#define ERROR 0

typedef int ElemType;
typedef int Status;

typedef struct
{
    ElemType  elem[MAXSIZE];
    int length;
} SqList;

int Cheak(SqList * L)
{
    if(!L)
    {
        printf("线性表未创建!\n");
        return 0;
    }
    return 1;
}

Status InitList(SqList * &L)///构造一个空的线性表
{
    L =(SqList*)malloc( LIST_INIT_SIZE * sizeof(SqList));
    if(!L) exit(OVERFLOW);
    L->length = 0;
    return OK;
}

Status DestroyList(SqList * & L)
{
        free(L);
        L=NULL;
        return OK;
}

void ListEmpty(SqList * L)
{
    if(L->length==0)
        printf("线性表为空\n");
    else
        printf("线性表非空\n");
}

int ListLength(SqList *L)
{
    return L->length;
}

Status GetElem(SqList *L,int i,int & e)
{
    if(L->length==0)
    {
        printf("线性表为空\n");
        return ERROR;
    }
    if(i<1||i>L->length)
    {
        printf("超出范围\n");
        return ERROR;
    }
    e=L->elem[i-1];
    return OK;
}

Status ListInsert(SqList * L,int i,ElemType e)
{
    int j;
    if(i<1||i>L->length+1)return ERROR;
    for( j=L->length-1; j>=i; j--)
    {
        L->elem[j+1]=L->elem[j];
    }
    L->elem[j+1]=e;
    L->length++;
    return OK;
}

Status ListDelete(SqList *L,int i,ElemType &e)
{
    if(i<1||i>L->length+1)return ERROR;
    e=L->elem[i-1];
    for(int j=i-1; j<L->length-1; j++)
    {
        L->elem[j]=L->elem[j+1];
    }
    L->length--;
    return OK;
}

void Display()
{
    system("cls");
    printf("1.创建线性表\n");
    printf("2.删除线性表\n");
    printf("3.线性表是否为空\n");
    printf("4.线性表长度\n");
    printf("5.获取线性表元素\n");
    printf("6.插入元素\n");
    printf("7.删除元素\n");
    printf("8.遍历线性表\n");
    printf("9.退出\n");
}

void ListTraverse(SqList *L)
{
    if(L->length==0)
        printf("线性表为空!!!\n");
    else
        for(int i=0; i<L->length; i++)
            printf("%d%c",i==(L->length-1) ?‘\n‘:‘ ‘,L->elem[i]);
}

int main()
{
    SqList *L;
    L=NULL;
    int order,e,i;
    while(1)
    {
        Display();
        scanf("%d",&order);
        switch(order)
        {
        case 1:
            InitList(L);
            break;
        case 2:
            if(Cheak(L))DestroyList(L);
            break;
        case 3:
            if(Cheak(L))ListEmpty(L);
            break;
        case 4:
            if(Cheak(L))printf("线性表长度为%d\n",ListLength(L));
            break;
        case 5:
            if(Cheak(L))
            {
                printf("输入你想获取的元素序号:");
                scanf("%d",&i);
                GetElem(L,i,e);
                printf("元素为:%d\n",e);
            }
            break;
        case 6:
            if(Cheak(L))
            {
                printf("输入你想插入的位置和元素:");
                scanf("%d%d",&i,&e);
                ListInsert(L,i,e);
            }
            break;
        case 7:
            if(Cheak(L))
            {
                printf("输入你想删除的位置和元素:");
                scanf("%d%d",&i,&e);
                ListDelete(L,i,e);
            }
            break;
        case 8:
            if(Cheak(L))ListTraverse(L);
            break;
            default:return 0;
        }
    system("pause");
    }

    return 0;
}