好不容易linux的課程結束了，下面就進入了數據結構的課程，對於沒學過這本書的我，只能弱弱的說一句，數據結構真的好難，在學習的過程中，覺得最經典的一句話便是，數據結構+算法=程序。我只想說理解數據結構真的好難，太富有邏輯性了，有時候真的還需要發揮自己的空間想象能力，幾天的學習，其實還算可以吧，下面我就給大家寫一點線性表的基本操作吧，我儘可能的講解的清楚一些，方便看的人有興趣能有自己實現。
#include <stdio.h>
#include <stdlib.h>
#include "datatype.h"
#include "seqlist.h"
void iterate_list(seqlist_t *list)
{
int i;
printf("list.last = %d, list = {", list->last);
for (i = -1; i < list->last;) {
printf("%d,", list->data[++i]);
}
if (LengthSqlist(list) > 0)
printf("\b}\n");
else
printf("}\n");
}
int main(int argc, char *argv[])
{
int i;
data_t a[10] = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20};
data_t x;
seqlist_t *list;
list = CreateEmptySqlist();
if (NULL == list) return -1;
for (i = 0; i < 10; i++) {
if (InsertSqlist(list, i, a[i]) < 0)
break;
}
iterate_list(list);
GetSqlist(list, 4, &x);
printf("list[4] = %d\n", x);
printf("updated list[4] to 100\n");
SetSqlist(list, 4, 100);
GetSqlist(list, 4, &x);
printf("now list[4] = %d\n", x);
iterate_list(list);
printf("removed list[4]\n");
DeleteSqlist(list, 4);
GetSqlist(list, 4, &x);
printf("now list[4] = %d\n", x);
printf("and total number of list is %d\n", LengthSqlist(list));
iterate_list(list);
ClearSqlist(list);
printf("after clear, total number of list is %d\n", LengthSqlist(list));
iterate_list(list);
DestroySqlist(list);
return 0;
}
#include <stdio.h>
#include <stdlib.h>
#include "seqlist.h"
seqlist_t *CreateEmptySqlist()
{
seqlist_t *list;
list = (seqlist_t *)malloc(sizeof(seqlist_t));
if (list) {
list->last = -1;
}
return list;
}
void DestroySqlist(seqlist_t *list)
{
if (NULL != list)
free(list);
}
int FullSqlist(seqlist_t *list)
{
if (list) {
if ((MAX - 1) == list->last) {
return 1;
} else {
return 0;
}
} else {
return -1;
}
}
int EmptySqlist(seqlist_t *list)
{
if (list) {
if (-1 == list->last) {
return 1;
} else {
return 0;
}
} else {
return -1;
}
}
void ClearSqlist(seqlist_t *list)
{
if (list) {
list->last = -1;
}
return;
}
int LengthSqlist(seqlist_t *list)
{
if (list) {
return (list->last + 1);
} else {
return -1;
}
}
int GetSqlist(seqlist_t *list, int at, data_t *x)
{
if (!list) return -1;
if ((at < 0) || (at > list->last)) return -1;
if (x) {
*x = list->data[at];
}
return 0;
}
int SetSqlist(seqlist_t *list, int at, data_t x)
{
if (!list) return -1;
if ((at < 0) || (at > list->last)) return -1;
list->data[at] = x;
return 0;
}
int InsertSqlist(seqlist_t *list, int at, data_t x)
{
int i;
if (!list) return -1;
if (at < 0) {
/* at must >=0 */
return -1;
}
if (FullSqlist(list)) {
/* memory space is not sufficient */
return -2;
}
if (at > list->last) {
at = list->last + 1;
}
for (i = list->last; i >= at; i--) {
list->data[i + 1] = list->data[i];
}
list->data[at] = x;
list->last++;
return 0;
}
int DeleteSqlist(seqlist_t *list, int at)
{
int i;
if (!list) return -1;
if ((at < 0) || (at > list->last)) return 0;
for (i = at; i < list->last; i++) {
list->data[i] = list->data[i + 1];
}
list->last--;
return 1;
}
#ifndef _SEQ_LIST_H_
#define _SEQ_LIST_H_
#include "datatype.h"
#define MAX 100
typedef struct {
data_t data[MAX];
int last; /* pointer to the last element of the array */
} seqlist_t;
/*
* create a list and init it as empty
* Input : void
* Output: void
* Return: new list, NULL when failed
*/
seqlist_t *CreateEmptySqlist();
/*
* destroy a list
* Input : the list to be destroied.
* Output: void
* Return: void
*/
void DestroySqlist(seqlist_t *list);
/*
* clear the list and reset it as empty
* Input : the list to be cleared.
* Output: void
* Return: void
*/
void ClearSqlist(seqlist_t *list);
/*
* judge if the list is empty
* Input: the list to be tested.
* Output: void
* Return:
* 1: list is empty
* 0: not
* -1: error, e.g. the list is invalid
*/
int EmptySqlist(seqlist_t *list);
/*
* judge if the list is full
* Input : the list to be tested.
* Output: void
* Return:
* 1 : list is full
* 0 : not
* -1: error
*/
int FullSqlist(seqlist_t *list);
/*
* get length of the list
* Input : the list to be tested.
* Output: void
* Return:
* >= 0: length of the list;
* -1 : means error
*/
int LengthSqlist(seqlist_t *list);
/*
* Insert element at the specified position. If the "at" exceed the
* up-range of the list, append the data at the end of the list.
* e.g. insert a new data into a {}.
* Input :
* list : the list to be operated.
* at : the position at which to insert the new element,
* position index starts from zero.
* x : the data to be inserted
* Output: void
* Return:
* 0 : success;
* <0: error
*/
int InsertSqlist(seqlist_t *list, int at, data_t x);
/*
* delete the element by the position
* Input :
* list : the list to be operated.
* at : the position at which to delete the element,
* position index starts from zero
* Output : void
* Return :
* 1 : success;
* 0 : not found
* -1: error
*/
int DeleteSqlist(seqlist_t *list, int at);
/*
* get data of element at specified position
* Input :
* list : the list to be operated.
* at : the position where to get the element at,
* position index starts from zero.
* Output:
* x : the data value returned
* Return:
* 0 : success;
* -1: error, e.g. list is invalid; 'at' extends
* the range of the list
*/
int GetSqlist(seqlist_t *list, int at, data_t *x);
/*
* set/update data of element at specified position
* Input :
* list : the list to be operated.
* at : the position at where to set the element,
* position index starts from zero
* x : the new data value
* Output: void
* Return:
* 0 : success;
* -1: error, e.g. list is invalid; 'at' extends the
* range of the list
*/
int SetSqlist(seqlist_t *list, int at, data_t x);
#endif /* _SEQ_LIST_H_ */
#ifndef _DATA_TYPE_H_
#define _DATA_TYPE_H_
typedef int data_t;
#endif /* _DATA_TYPE_H_ */
上面的內容是四個部分，其中兩個.c文件，兩個.h文件。共同實現順序表的各種操作，時間不多了，要下課了，只能輕描淡寫的爲大家寫到這裏，大家可以把上面的程序仔細的研究一下，希望能有能好學習順序表爲下面的鏈表打下基礎。