数据结构 / day03作业

1.顺序表按元素删除

//main.c#include "head.h"
int main(int argc, const char *argv[])
{sqlist *list=create_space();// printf("&list=%p\n", list);int n;int index;data_type element, key;printf("please input n;");scanf("%d", &n);for(int i=0; i<n; i++){printf("please input %d element:\n", i+1);scanf("%d", &element);int flag = append(list, element);//printf("main-->flag=%d\n", flag);if(flag==-1){puts("list full or error\n");break;}}puts("---output inputed list---\n");//printf("output inputed list\n");	output(list);putchar(10);/*puts("------");delete_tail(list);printf("the last element has been deleted\n");puts("------");delete_tail(list);printf("the last element has been deleted\n");puts("------");printf("output list after delete\n");printf("list len=%d\n", list->len);output(list);puts("------");search_by_index(list, 1);puts("------");update(list, 1, 99);printf("element 1 has been updated\n");printf("list len=%d\n", list->len);output(list);puts("------");insert(list, 1, 100);printf("postion 1 insrerted an element\n");printf("list len=%d\n", list->len);output(list);puts("------");printf("please input index for deleting:");scanf("%d", &index);delete_by_index(list, index);printf("postion %d element has been deleted\n", index);output(list);puts("---update by element---");printf("please input key for updating:");scanf("%d", &key);printf("please input  element for updating:");scanf("%d", &element);int ret = update_by_element(list, key, element);if(ret==-1){printf("key %d is not found or other error\n", key );}else{printf("element %d has been updated to %d at pos %d\n",key, element, ret );}output(list); */puts("---delete by element---");printf("please input element to delete:");scanf("%d", &element);int ret = delete_by_element(list, element);if(ret==-1){printf("element %d is not found or other error\n", element );}else{printf("element %d has been deleted\n", element);}output(list);return 0;
}

//head.h#ifndef __HEAD_H__
#define __HEAD_H__#include <string.h>
#include <stdlib.h>
#include <stdio.h>//顺序表结构体
#define MAXSIZE 20typedef int data_type;typedef struct
{//数据元素data_type data[MAXSIZE];//顺序表长度int len;}sqlist; // SQLIST --> sqlistsqlist *create_space();
int full_sqlist(sqlist*list);
int append(sqlist *list, data_type element);
int delete_tail(sqlist *list);
void output(sqlist *list);
int empty_sqlist(sqlist *list);
int insert(sqlist *list, int index, data_type element);
void search_by_index(sqlist *list, int index);
int index_out_of_range(sqlist *list, int index);
int update(sqlist *list, int index, data_type element);
int delete_by_index(sqlist *list, int index);
int search_by_element(sqlist *list, data_type element);
int update_by_element(sqlist *list, data_type key, data_type element );
int delete_by_element(sqlist *list, data_type element );#endif

//test.c#include "head.h"sqlist *create_space()
{sqlist *list = (sqlist*)malloc(sizeof(sqlist));if(NULL==list){puts("error");return NULL;}list->len=0; //顺序表初始化长度清0//数据清0memset(list->data, 0, sizeof(list->data));return list;
}int full_sqlist(sqlist*list)
{int flag = list->len==MAXSIZE;//printf("full_list-->flag=%d\n", flag);return flag;
}int empty_sqlist(sqlist *list)
{if(list->len==0){return 1;}else{return 0;}}int append(sqlist *list, data_type element)
{// printf("list=%p\n", list);   if(NULL==list || full_sqlist(list)){   return -1; }   list->data[list->len++]=element;return 0;//  }     void output(sqlist *list)
{if(NULL==list||empty_sqlist(list)){printf("list is NULL\n");return;}for(int i=0; i<list->len; i++){printf("%d\t", list->data[i]);}putchar(10);}int delete_tail(sqlist *list)
{	if(NULL==list||empty_sqlist(list)){printf("list is NULL\n");return -1;}list->len--;//不可以释放空间return 0;}int insert(sqlist *list, int index, data_type element)
{if(NULL==list || full_sqlist(list)||index>list->len||index<0 ){printf("list is NULL or index error\n");return -1;}for(int i=list->len-1; i>=index; i--){list->data[i+1] = list->data[i];}list->data[index]=element;list->len++;return 0;}int index_out_of_range(sqlist *list, int index)
{if(NULL==list||empty_sqlist(list)){printf("list is NULL or empty!");return -1;}if(index<0||index>=list->len){return 1;}else{return 0;}}void search_by_index(sqlist *list, int index)
{if(NULL==list||index_out_of_range(list, index)||empty_sqlist(list)){printf("list is NULL or index out of range");return;}data_type element = list->data[index];printf("found element:%d\n", element);}int update(sqlist *list, int index, data_type element)
{if(NULL==list||empty_sqlist(list)||index_out_of_range(list, index)){printf("list is NULL or empty or index error\n");return -1;}list->data[index] = element;return 0;}int delete_by_index(sqlist *list, int index)
{if(NULL==list || empty_sqlist(list)||index_out_of_range(list, index)){printf("list is NULL or index error\n");return -1;}for(int i=index; i<list->len-1; i++){list->data[i] = list->data[i+1];}list->len--;return 0;
}int rm_duplicate(sqlist *list)
{if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return -1;}}int search_by_element(sqlist *list, data_type element)
{if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return -1;}for(int i=0; i<list->len; i++){if(element==list->data[i]){return i;}}return -1;
}int update_by_element(sqlist *list, data_type key, data_type element )
{int found=-1;if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return found;}for(int i=0; i<list->len; i++){if(key==list->data[i]){list->data[i] = element;found=i;}}return found;
}int delete_by_element(sqlist *list, data_type element )
{int flag=-1;if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return flag;}int idx=search_by_element(list, element);if(idx==-1){return -1;}int ret=delete_by_index(list, idx);return ret;}

2 顺序表按元素修改

//main.c#include "head.h"
int main(int argc, const char *argv[])
{sqlist *list=create_space();// printf("&list=%p\n", list);int n;int index;data_type element, key;printf("please input n;");scanf("%d", &n);for(int i=0; i<n; i++){printf("please input %d element:\n", i+1);scanf("%d", &element);int flag = append(list, element);//printf("main-->flag=%d\n", flag);if(flag==-1){puts("list full or error\n");break;}}puts("---output inputed list---\n");//printf("output inputed list\n");	output(list);/*puts("------");delete_tail(list);printf("the last element has been deleted\n");puts("------");delete_tail(list);printf("the last element has been deleted\n");puts("------");printf("output list after delete\n");printf("list len=%d\n", list->len);output(list);puts("------");search_by_index(list, 1);puts("------");update(list, 1, 99);printf("element 1 has been updated\n");printf("list len=%d\n", list->len);output(list);puts("------");insert(list, 1, 100);printf("postion 1 insrerted an element\n");printf("list len=%d\n", list->len);output(list);puts("------");printf("please input index for deleting:");scanf("%d", &index);delete_by_index(list, index);printf("postion %d element has been deleted\n", index);output(list);
*/	puts("---update by element---");printf("please input key for updating:");scanf("%d", &key);printf("please input  element for updating:");scanf("%d", &element);int ret = update_by_element(list, key, element);if(ret==-1){printf("key %d is not found or other error\n", key );}else{printf("element %d has been updated to %d at pos %d\n",key, element, ret );}output(list);return 0;
}

// head.h#ifndef __HEAD_H__
#define __HEAD_H__#include <string.h>
#include <stdlib.h>
#include <stdio.h>//顺序表结构体
#define MAXSIZE 20typedef int data_type;typedef struct
{//数据元素data_type data[MAXSIZE];//顺序表长度int len;}sqlist; // SQLIST --> sqlistsqlist *create_space();
int full_sqlist(sqlist*list);
int append(sqlist *list, data_type element);
int delete_tail(sqlist *list);
void output(sqlist *list);
int empty_sqlist(sqlist *list);
int insert(sqlist *list, int index, data_type element);
void search_by_index(sqlist *list, int index);
int index_out_of_range(sqlist *list, int index);
int update(sqlist *list, int index, data_type element);
int delete_by_index(sqlist *list, int index);
int search_by_element(sqlist *list, data_type element);
int update_by_element(sqlist *list, data_type key, data_type element );#endif

// test.c#include "head.h"sqlist *create_space()
{sqlist *list = (sqlist*)malloc(sizeof(sqlist));if(NULL==list){puts("error");return NULL;}list->len=0; //顺序表初始化长度清0//数据清0memset(list->data, 0, sizeof(list->data));return list;
}int full_sqlist(sqlist*list)
{int flag = list->len==MAXSIZE;//printf("full_list-->flag=%d\n", flag);return flag;
}int empty_sqlist(sqlist *list)
{if(list->len==0){return 1;}else{return 0;}}int append(sqlist *list, data_type element)
{// printf("list=%p\n", list);   if(NULL==list || full_sqlist(list)){   return -1; }   list->data[list->len++]=element;return 0;//  }     void output(sqlist *list)
{if(NULL==list||empty_sqlist(list)){printf("list is NULL\n");return;}for(int i=0; i<list->len; i++){printf("%d\t", list->data[i]);}putchar(10);}int delete_tail(sqlist *list)
{	if(NULL==list||empty_sqlist(list)){printf("list is NULL\n");return -1;}list->len--;//不可以释放空间return 0;}int insert(sqlist *list, int index, data_type element)
{if(NULL==list || full_sqlist(list)||index>list->len||index<0 ){printf("list is NULL or index error\n");return -1;}for(int i=list->len-1; i>=index; i--){list->data[i+1] = list->data[i];}list->data[index]=element;list->len++;return 0;}int index_out_of_range(sqlist *list, int index)
{if(NULL==list||empty_sqlist(list)){printf("list is NULL or empty!");return -1;}if(index<0||index>=list->len){return 1;}else{return 0;}}void search_by_index(sqlist *list, int index)
{if(NULL==list||index_out_of_range(list, index)||empty_sqlist(list)){printf("list is NULL or index out of range");return;}data_type element = list->data[index];printf("found element:%d\n", element);}int update(sqlist *list, int index, data_type element)
{if(NULL==list||empty_sqlist(list)||index_out_of_range(list, index)){printf("list is NULL or empty or index error\n");return -1;}list->data[index] = element;return 0;}int delete_by_index(sqlist *list, int index)
{if(NULL==list || empty_sqlist(list)||index_out_of_range(list, index)){printf("list is NULL or index error\n");return -1;}for(int i=index; i<list->len-1; i++){list->data[i] = list->data[i+1];}list->len--;return 0;
}int rm_duplicate(sqlist *list)
{if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return -1;}}int search_by_element(sqlist *list, data_type element)
{if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return -1;}for(int i=0; i<list->len; i++){if(element==list->data[i]){return i;}}return -1;
}int update_by_element(sqlist *list, data_type key, data_type element )
{int found=-1;if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return found;}for(int i=0; i<list->len; i++){if(key==list->data[i]){list->data[i] = element;found=i;}}return found;
}

please input n;5
please input 1 element:
1
please input 2 element:
2
please input 3 element:
3
please input 4 element:
4
please input 5 element:
5
---output inputed list---1	2	3	4	5	
---update by element---
please input key for updating:3
please input  element for updating:7
element 3 has been updated to 7 at pos 2
1	2	7	4	5	

3. 顺序表去重

//main.c#include "head.h"
int main(int argc, const char *argv[])
{sqlist *list=create_space();// printf("&list=%p\n", list);int n;int index;data_type element, key;printf("please input n;");scanf("%d", &n);for(int i=0; i<n; i++){printf("please input %d element:\n", i+1);scanf("%d", &element);int flag = append(list, element);//printf("main-->flag=%d\n", flag);if(flag==-1){puts("list full or error\n");break;}}puts("---output inputed list---\n");//printf("output inputed list\n");	output(list);putchar(10);/*puts("------");delete_tail(list);printf("the last element has been deleted\n");puts("------");delete_tail(list);printf("the last element has been deleted\n");puts("------");printf("output list after delete\n");printf("list len=%d\n", list->len);output(list);puts("------");search_by_index(list, 1);puts("------");update(list, 1, 99);printf("element 1 has been updated\n");printf("list len=%d\n", list->len);output(list);puts("------");insert(list, 1, 100);printf("postion 1 insrerted an element\n");printf("list len=%d\n", list->len);output(list);puts("---delete by index---");printf("please input index for deleting:");scanf("%d", &index);delete_by_index(list, index);printf("postion %d element has been deleted\n", index);output(list);puts("---update by element---");printf("please input key for updating:");scanf("%d", &key);printf("please input  element for updating:");scanf("%d", &element);int ret = update_by_element(list, key, element);if(ret==-1){printf("key %d is not found or other error\n", key );}else{printf("element %d has been updated to %d at pos %d\n",key, element, ret );}output(list); puts("---delete by element---");printf("please input element to delete:");scanf("%d", &element);int ret = delete_by_element(list, element);if(ret==-1){printf("element %d is not found or other error\n", element );}else{printf("element %d has been deleted\n", element);}output(list);
*/puts("---remove duplicate element---\n");puts("> list before remove duplicate:\n");output(list);int ret = rm_duplicate(list);if(ret==-1){printf("element %d is not found or other error\n", element );}else{puts("> list after remove duplicate:\n");output(list);}return 0;
}

//head.h#ifndef __HEAD_H__
#define __HEAD_H__#include <string.h>
#include <stdlib.h>
#include <stdio.h>//顺序表结构体
#define MAXSIZE 20typedef int data_type;typedef struct
{//数据元素data_type data[MAXSIZE];//顺序表长度int len;}sqlist; // SQLIST --> sqlistsqlist *create_space();
int full_sqlist(sqlist*list);
int append(sqlist *list, data_type element);
int delete_tail(sqlist *list);
void output(sqlist *list);
int empty_sqlist(sqlist *list);
int insert(sqlist *list, int index, data_type element);
void search_by_index(sqlist *list, int index);
int index_out_of_range(sqlist *list, int index);
int update(sqlist *list, int index, data_type element);
int delete_by_index(sqlist *list, int index);
int search_by_element(sqlist *list, data_type element);
int update_by_element(sqlist *list, data_type key, data_type element );
int delete_by_element(sqlist *list, data_type element );
int rm_duplicate(sqlist *list);#endif

//test.c#include "head.h"sqlist *create_space()
{sqlist *list = (sqlist*)malloc(sizeof(sqlist));if(NULL==list){puts("error");return NULL;}list->len=0; //顺序表初始化长度清0//数据清0memset(list->data, 0, sizeof(list->data));return list;
}int full_sqlist(sqlist*list)
{int flag = list->len==MAXSIZE;//printf("full_list-->flag=%d\n", flag);return flag;
}int empty_sqlist(sqlist *list)
{if(list->len==0){return 1;}else{return 0;}}int append(sqlist *list, data_type element)
{// printf("list=%p\n", list);   if(NULL==list || full_sqlist(list)){   return -1; }   list->data[list->len++]=element;return 0;//  }     void output(sqlist *list)
{if(NULL==list||empty_sqlist(list)){printf("list is NULL\n");return;}for(int i=0; i<list->len; i++){printf("%d\t", list->data[i]);}putchar(10);}int delete_tail(sqlist *list)
{	if(NULL==list||empty_sqlist(list)){printf("list is NULL\n");return -1;}list->len--;//不可以释放空间return 0;}int insert(sqlist *list, int index, data_type element)
{if(NULL==list || full_sqlist(list)||index>list->len||index<0 ){printf("list is NULL or index error\n");return -1;}for(int i=list->len-1; i>=index; i--){list->data[i+1] = list->data[i];}list->data[index]=element;list->len++;return 0;}int index_out_of_range(sqlist *list, int index)
{if(NULL==list||empty_sqlist(list)){printf("list is NULL or empty!");return -1;}if(index<0||index>=list->len){return 1;}else{return 0;}}void search_by_index(sqlist *list, int index)
{if(NULL==list||index_out_of_range(list, index)||empty_sqlist(list)){printf("list is NULL or index out of range");return;}data_type element = list->data[index];printf("found element:%d\n", element);}int update(sqlist *list, int index, data_type element)
{if(NULL==list||empty_sqlist(list)||index_out_of_range(list, index)){printf("list is NULL or empty or index error\n");return -1;}list->data[index] = element;return 0;}int delete_by_index(sqlist *list, int index)
{if(NULL==list || empty_sqlist(list)||index_out_of_range(list, index)){printf("list is NULL or index error\n");return -1;}for(int i=index; i<list->len-1; i++){list->data[i] = list->data[i+1];}list->len--;return 0;
}int rm_duplicate(sqlist *list)
{if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return -1;}for(int i=0; i<list->len-1; i++){int cur=i;for(int j=i+1; j<list->len; j++){if(list->data[cur]==list->data[j]){printf("list->len=%d, i=%d, j=%d\n", list->len, i, j);delete_by_index(list, j);j--;}}}return 0;}int search_by_element(sqlist *list, data_type element)
{if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return -1;}for(int i=0; i<list->len; i++){if(element==list->data[i]){return i;}}return -1;
}int update_by_element(sqlist *list, data_type key, data_type element )
{int found=-1;if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return found;}for(int i=0; i<list->len; i++){if(key==list->data[i]){list->data[i] = element;found=i;}}return found;
}int delete_by_element(sqlist *list, data_type element )
{int flag=-1;if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return flag;}int idx=search_by_element(list, element);if(idx==-1){return -1;}int ret=delete_by_index(list, idx);return ret;}

4. 顺序表有序合并

//main.c#include "head.h"
int main(int argc, const char *argv[])
{sqlist *list=create_space();// printf("&list=%p\n", list);int n;int index;data_type element, key;/*printf("please input n;");scanf("%d", &n);for(int i=0; i<n; i++){printf("please input %d element:\n", i+1);scanf("%d", &element);int flag = append(list, element);//printf("main-->flag=%d\n", flag);if(flag==-1){puts("list full or error\n");break;}}puts("---output inputed list---\n");//printf("output inputed list\n");	output(list);putchar(10);puts("------");delete_tail(list);printf("the last element has been deleted\n");puts("------");delete_tail(list);printf("the last element has been deleted\n");puts("------");printf("output list after delete\n");printf("list len=%d\n", list->len);output(list);puts("------");search_by_index(list, 1);puts("------");update(list, 1, 99);printf("element 1 has been updated\n");printf("list len=%d\n", list->len);output(list);puts("------");insert(list, 1, 100);printf("postion 1 insrerted an element\n");printf("list len=%d\n", list->len);output(list);puts("---delete by index---");printf("please input index for deleting:");scanf("%d", &index);delete_by_index(list, index);printf("postion %d element has been deleted\n", index);output(list);puts("---update by element---");printf("please input key for updating:");scanf("%d", &key);printf("please input  element for updating:");scanf("%d", &element);int ret = update_by_element(list, key, element);if(ret==-1){printf("key %d is not found or other error\n", key );}else{printf("element %d has been updated to %d at pos %d\n",key, element, ret );}output(list); puts("---delete by element---");printf("please input element to delete:");scanf("%d", &element);int ret = delete_by_element(list, element);if(ret==-1){printf("element %d is not found or other error\n", element );}else{printf("element %d has been deleted\n", element);}output(list);puts("---remove duplicate element---\n");puts("> list before remove duplicate:\n");output(list);int ret = rm_duplicate(list);if(ret==-1){printf("element %d is not found or other error\n", element );}else{puts("> list after remove duplicate:\n");output(list);}
*/puts("---combine 2 lists---\n");sqlist *la=create_space();sqlist *lb=create_space();sqlist *lc=create_space();append(la, 11);append(la, 11);append(la, 17);append(la, 24);append(la, 45);append(lb, 13);append(lb, 16);append(lb, 16);append(lb, 36);append(lb, 45);append(lb, 62);puts(">list la:\n");output(la);puts(">list lb:\n");output(lb);combine(la, lb, lc);puts(">list lc after combine:\n");output(lc);return 0;
}

//head.h#ifndef __HEAD_H__
#define __HEAD_H__#include <string.h>
#include <stdlib.h>
#include <stdio.h>//顺序表结构体
#define MAXSIZE 30typedef int data_type;typedef struct
{//数据元素data_type data[MAXSIZE];//顺序表长度int len;}sqlist; // SQLIST --> sqlistsqlist *create_space();
int full_sqlist(sqlist*list);
int append(sqlist *list, data_type element);
int delete_tail(sqlist *list);
void output(sqlist *list);
int empty_sqlist(sqlist *list);
int insert(sqlist *list, int index, data_type element);
void search_by_index(sqlist *list, int index);
int index_out_of_range(sqlist *list, int index);
int update(sqlist *list, int index, data_type element);
int delete_by_index(sqlist *list, int index);
int search_by_element(sqlist *list, data_type element);
int update_by_element(sqlist *list, data_type key, data_type element );
int delete_by_element(sqlist *list, data_type element );
int rm_duplicate(sqlist *list);
void combine(sqlist *la,sqlist*lb,sqlist*lc);#endif

//test.c#include "head.h"sqlist *create_space()
{sqlist *list = (sqlist*)malloc(sizeof(sqlist));if(NULL==list){puts("error");return NULL;}list->len=0; //顺序表初始化长度清0//数据清0memset(list->data, 0, sizeof(list->data));return list;
}int full_sqlist(sqlist*list)
{int flag = list->len==MAXSIZE;//printf("full_list-->flag=%d\n", flag);return flag;
}int empty_sqlist(sqlist *list)
{if(list->len==0){return 1;}else{return 0;}}int append(sqlist *list, data_type element)
{// printf("list=%p\n", list);   if(NULL==list || full_sqlist(list)){   return -1; }   list->data[list->len++]=element;return 0;//  }     void output(sqlist *list)
{if(NULL==list||empty_sqlist(list)){printf("list is NULL\n");return;}for(int i=0; i<list->len; i++){printf("%d\t", list->data[i]);}putchar(10);}int delete_tail(sqlist *list)
{	if(NULL==list||empty_sqlist(list)){printf("list is NULL\n");return -1;}list->len--;//不可以释放空间return 0;}int insert(sqlist *list, int index, data_type element)
{if(NULL==list || full_sqlist(list)||index>list->len||index<0 ){printf("list is NULL or index error\n");return -1;}for(int i=list->len-1; i>=index; i--){list->data[i+1] = list->data[i];}list->data[index]=element;list->len++;return 0;}int index_out_of_range(sqlist *list, int index)
{if(NULL==list||empty_sqlist(list)){printf("list is NULL or empty!");return -1;}if(index<0||index>=list->len){return 1;}else{return 0;}}void search_by_index(sqlist *list, int index)
{if(NULL==list||index_out_of_range(list, index)||empty_sqlist(list)){printf("list is NULL or index out of range");return;}data_type element = list->data[index];printf("found element:%d\n", element);}int update(sqlist *list, int index, data_type element)
{if(NULL==list||empty_sqlist(list)||index_out_of_range(list, index)){printf("list is NULL or empty or index error\n");return -1;}list->data[index] = element;return 0;}int delete_by_index(sqlist *list, int index)
{if(NULL==list || empty_sqlist(list)||index_out_of_range(list, index)){printf("list is NULL or index error\n");return -1;}for(int i=index; i<list->len-1; i++){list->data[i] = list->data[i+1];}list->len--;return 0;
}int rm_duplicate(sqlist *list)
{if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return -1;}for(int i=0; i<list->len-1; i++){int cur=i;for(int j=i+1; j<list->len; j++){if(list->data[cur]==list->data[j]){printf("list->len=%d, i=%d, j=%d\n", list->len, i, j);delete_by_index(list, j);j--;}}}return 0;}int search_by_element(sqlist *list, data_type element)
{if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return -1;}for(int i=0; i<list->len; i++){if(element==list->data[i]){return i;}}return -1;
}int update_by_element(sqlist *list, data_type key, data_type element )
{int found=-1;if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return found;}for(int i=0; i<list->len; i++){if(key==list->data[i]){list->data[i] = element;found=i;}}return found;
}int delete_by_element(sqlist *list, data_type element )
{int flag=-1;if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return flag;}int idx=search_by_element(list, element);if(idx==-1){return -1;}int ret=delete_by_index(list, idx);return ret;}void combine(sqlist *la,sqlist*lb,sqlist*lc)
{int p=0;int q=0;while(p<la->len && q<lb->len){if(la->data[p] <=lb->data[q]){lc->data[lc->len++]=la->data[p++];}else{lc->data[lc->len++]=lb->data[q++];}}//把la剩余元素存到lcwhile(p<la->len){lc->data[lc->len++]=la->data[p++];}//把lb剩余元素存到lcwhile(q<lb->len){lc->data[lc->len++]=lb->data[q++];}
}

5 顺序表释放空间

//main.c#include "head.h"
int main(int argc, const char *argv[])
{sqlist *list=create_space();// printf("&list=%p\n", list);int n;int index;data_type element, key;printf("please input n;");scanf("%d", &n);for(int i=0; i<n; i++){printf("please input %d element:\n", i+1);scanf("%d", &element);int flag = append(list, element);//printf("main-->flag=%d\n", flag);if(flag==-1){puts("list full or error\n");break;}}puts("---output inputed list---\n");//printf("output inputed list\n");	output(list);putchar(10);/*puts("------");delete_tail(list);printf("the last element has been deleted\n");puts("------");delete_tail(list);printf("the last element has been deleted\n");puts("------");printf("output list after delete\n");printf("list len=%d\n", list->len);output(list);puts("------");search_by_index(list, 1);puts("------");update(list, 1, 99);printf("element 1 has been updated\n");printf("list len=%d\n", list->len);output(list);puts("------");insert(list, 1, 100);printf("postion 1 insrerted an element\n");printf("list len=%d\n", list->len);output(list);puts("---delete by index---");printf("please input index for deleting:");scanf("%d", &index);delete_by_index(list, index);printf("postion %d element has been deleted\n", index);output(list);puts("---update by element---");printf("please input key for updating:");scanf("%d", &key);printf("please input  element for updating:");scanf("%d", &element);int ret = update_by_element(list, key, element);if(ret==-1){printf("key %d is not found or other error\n", key );}else{printf("element %d has been updated to %d at pos %d\n",key, element, ret );}output(list); puts("---delete by element---");printf("please input element to delete:");scanf("%d", &element);int ret = delete_by_element(list, element);if(ret==-1){printf("element %d is not found or other error\n", element );}else{printf("element %d has been deleted\n", element);}output(list);puts("---remove duplicate element---\n");puts("> list before remove duplicate:\n");output(list);int ret = rm_duplicate(list);if(ret==-1){printf("element %d is not found or other error\n", element );}else{puts("> list after remove duplicate:\n");output(list);}puts("---combine 2 lists---\n");sqlist *la=create_space();sqlist *lb=create_space();sqlist *lc=create_space();append(la, 11);append(la, 11);append(la, 17);append(la, 24);append(la, 45);append(lb, 13);append(lb, 16);append(lb, 16);append(lb, 36);append(lb, 45);append(lb, 62);puts(">list la:\n");output(la);puts(">list lb:\n");output(lb);combine(la, lb, lc);puts(">list lc after combine:\n");output(lc);*/puts("---free list space---\n");sqlist *ret = free_list(list);printf("list=%p\n", ret );puts("> list space has been released\n");return 0;
}

//head.h#ifndef __HEAD_H__
#define __HEAD_H__#include <string.h>
#include <stdlib.h>
#include <stdio.h>//顺序表结构体
#define MAXSIZE 30typedef int data_type;typedef struct
{//数据元素data_type data[MAXSIZE];//顺序表长度int len;}sqlist; // SQLIST --> sqlistsqlist *create_space();
int full_sqlist(sqlist*list);
int append(sqlist *list, data_type element);
int delete_tail(sqlist *list);
void output(sqlist *list);
int empty_sqlist(sqlist *list);
int insert(sqlist *list, int index, data_type element);
void search_by_index(sqlist *list, int index);
int index_out_of_range(sqlist *list, int index);
int update(sqlist *list, int index, data_type element);
int delete_by_index(sqlist *list, int index);
int search_by_element(sqlist *list, data_type element);
int update_by_element(sqlist *list, data_type key, data_type element );
int delete_by_element(sqlist *list, data_type element );
int rm_duplicate(sqlist *list);
void combine(sqlist *la,sqlist*lb,sqlist*lc);
sqlist *free_list(sqlist *list);#endif

//test.c#include "head.h"sqlist *create_space()
{sqlist *list = (sqlist*)malloc(sizeof(sqlist));if(NULL==list){puts("error");return NULL;}list->len=0; //顺序表初始化长度清0//数据清0memset(list->data, 0, sizeof(list->data));return list;
}int full_sqlist(sqlist*list)
{int flag = list->len==MAXSIZE;//printf("full_list-->flag=%d\n", flag);return flag;
}int empty_sqlist(sqlist *list)
{if(list->len==0){return 1;}else{return 0;}}int append(sqlist *list, data_type element)
{// printf("list=%p\n", list);   if(NULL==list || full_sqlist(list)){   return -1; }   list->data[list->len++]=element;return 0;//  }     void output(sqlist *list)
{if(NULL==list||empty_sqlist(list)){printf("list is NULL\n");return;}for(int i=0; i<list->len; i++){printf("%d\t", list->data[i]);}putchar(10);}int delete_tail(sqlist *list)
{	if(NULL==list||empty_sqlist(list)){printf("list is NULL\n");return -1;}list->len--;//不可以释放空间return 0;}int insert(sqlist *list, int index, data_type element)
{if(NULL==list || full_sqlist(list)||index>list->len||index<0 ){printf("list is NULL or index error\n");return -1;}for(int i=list->len-1; i>=index; i--){list->data[i+1] = list->data[i];}list->data[index]=element;list->len++;return 0;}int index_out_of_range(sqlist *list, int index)
{if(NULL==list||empty_sqlist(list)){printf("list is NULL or empty!");return -1;}if(index<0||index>=list->len){return 1;}else{return 0;}}void search_by_index(sqlist *list, int index)
{if(NULL==list||index_out_of_range(list, index)||empty_sqlist(list)){printf("list is NULL or index out of range");return;}data_type element = list->data[index];printf("found element:%d\n", element);}int update(sqlist *list, int index, data_type element)
{if(NULL==list||empty_sqlist(list)||index_out_of_range(list, index)){printf("list is NULL or empty or index error\n");return -1;}list->data[index] = element;return 0;}int delete_by_index(sqlist *list, int index)
{if(NULL==list || empty_sqlist(list)||index_out_of_range(list, index)){printf("list is NULL or index error\n");return -1;}for(int i=index; i<list->len-1; i++){list->data[i] = list->data[i+1];}list->len--;return 0;
}int rm_duplicate(sqlist *list)
{if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return -1;}for(int i=0; i<list->len-1; i++){int cur=i;for(int j=i+1; j<list->len; j++){if(list->data[cur]==list->data[j]){printf("list->len=%d, i=%d, j=%d\n", list->len, i, j);delete_by_index(list, j);j--;}}}return 0;}int search_by_element(sqlist *list, data_type element)
{if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return -1;}for(int i=0; i<list->len; i++){if(element==list->data[i]){return i;}}return -1;
}int update_by_element(sqlist *list, data_type key, data_type element )
{int found=-1;if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return found;}for(int i=0; i<list->len; i++){if(key==list->data[i]){list->data[i] = element;found=i;}}return found;
}int delete_by_element(sqlist *list, data_type element )
{int flag=-1;if(NULL==list || empty_sqlist(list)){printf("list is NULL or empty\n");return flag;}int idx=search_by_element(list, element);if(idx==-1){return -1;}int ret=delete_by_index(list, idx);return ret;}void combine(sqlist *la,sqlist*lb,sqlist*lc)
{int p=0;int q=0;while(p<la->len && q<lb->len){if(la->data[p] <=lb->data[q]){lc->data[lc->len++]=la->data[p++];}else{lc->data[lc->len++]=lb->data[q++];}}//把la剩余元素存到lcwhile(p<la->len){lc->data[lc->len++]=la->data[p++];}//把lb剩余元素存到lcwhile(q<lb->len){lc->data[lc->len++]=lb->data[q++];}
}sqlist *free_list(sqlist *list)
{	int flag=-1;if(NULL==list || empty_sqlist(list)){printf("list is NULL\n");return NULL;}free(list);list=NULL;return list;}