//封装数组
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAXSIZE 20
typedef int ElemType;
typedef struct{
    ElemType data[MAXSIZE];
    int length; 
}SqList;

//获取线性表元素
Status GetElem(SqList L,int i,ElemType *e){
	if(L.length==0||i<1||i>L.length){
		return ERROR;
	}
	*e=L.data[i-1];
	return OK;
}

　　

//线性表插入
Status ListInsert(SqList *L,int i,ElemType e){
	int k;
	if(i<1||i>L->length+1||L->length==MAXSIZE)
		return ERROR;
	for(k=L->length-1;k>=i-1;k--){
		L->data[k+1]=L->data[k];
	}
	L->data[i-1]=e;
	L->length++;
	return OK;
}

　　

//线性表删除
Status ListDelete(SqList *L,int i,ElemType *e){
	int k;
	if(i<1||i>L->length||L->length==0)
		return ERROR;
	*e=L->data[i-1];
	for(k=i-1;k<L->length-1;k++){
		L->data[k]=L->data[k+1];
	}
	L->length--;
	return OK;
}