1 /*
 2  ============================================================================
 3  Name        : sqlist.c
 4  Author      : codecup
 5  Version     :
 6  Copyright   : Your copyright notice
 7  Description : Hello World in C, Ansi-style
 8  ============================================================================
 9  */
10 
11 #include <stdio.h>
12 #include <stdlib.h>
13 
14 #define MAXSIZE 20
15 #define OK 1
16 #define ERROR 0
17 #define TRUE 1
18 #define FALSE 0
19 
20 typedef int Status;
21 
22 typedef int ElementType;
23 typedef struct {
24     ElementType data[MAXSIZE]; //定义数组用于存储数据
25     int length; //线性表当前的长度
26 } SqList;
27 
28 //初始化线性表
29 void initSqList(SqList *L) {
30     L->length = 0;
31 }
32 
33 //获取线性表中的元素
34 Status getElem(SqList L, int i, ElementType *e) {
35     if (L.length == 0 || i < 1 || i > L.length) {
36         return ERROR;
37     }
38     *e = L.data[i - 1];
39     return OK;
40 }
41 
42 //插入元素
43 Status insert(SqList *L, int i, ElementType e) {
44     int j;
45     if (L->length == MAXSIZE) {
46         return ERROR;
47     }
48     if (i < 1 || i > L->length + 1) {
49         return ERROR;
50     }
51     if (i < L->length) {
52         for (j = L->length - 1; j > i; j--) {
53             L->data[j + 1] = L->data[j];
54         }
55     }
56     L->data[i - 1] = e;
57     L->length++;
58     return OK;
59 }
60 
61 //删除元素
62 Status delete(SqList *L, int i, ElementType *e) {
63     int k;
64     if (L->length == 0) {
65         return ERROR;
66     }
67     if (i < 1 || i > L->length) {
68         return ERROR;
69     }
70     *e = L->data[i - 1];
71     if (i < L->length) {
72         for (k = i; k < L->length; ++k) {
73             L->data[k - 1] = L->data[k];
74         }
75     }
76     L->length--;
77     return OK;
78 }
79 
80 int main(void) {
81     SqList L;
82     ElementType e;
83     initSqList(&L);
84     insert(&L, 1, 187);
85     getElem(L, 1, &e);
86     printf("%d", e);
87     return EXIT_SUCCESS;
88 }