單鏈表寫通訊錄

單鏈表實現通訊錄，增加，刪除,更改乙個聯絡人等功能。其中增加了乙個記憶體池功能，用於對廢棄記憶體的**和利用。

#include

#include
#include
#define max 1024
void
addperson
(struct presonlist *
*node)
;//新增乙個聯絡人
void
displaycontact
(struct presonlist *node)
;//顯示通訊錄
void
changperson
(struct presonlist *node,
char
**str1,
char
**str2)
;//更改聯絡人
void
delperson
(struct presonlist *
*node,
char
*str)
;//刪除乙個聯絡人
void
welcome
(void);
//歡迎介面
struct presonlist *pool =
null
;//定義乙個記憶體池
void
pooldelete
(void);
int count;
struct presonlist 
;void
addperson
(struct presonlist *
*node)
//如果記憶體池為空，則用malloc申請空間
else
}printf()
;scanf_s
("%s"
, newlist->name,
sizeof
(newlist->name));
printf()
;scanf_s
("%s"
, newlist->number,
sizeof
(newlist->number));
if(*node ==
null
)//如果指標為空,直接將新節點插入即可
else
//採用尾插法
tail = newlist;
//保證尾指標指向鍊錶的最末尾
}void
displaycontact
(struct presonlist *node)
}void
delperson
(struct presonlist *
*node,
char
*str)
//輸入鍊錶和要刪除的字串
if(current ==
null
)else
else
if(count < max)
//如果記憶體池大小小於max，則把刪除的current存放在pool中
else
//否則直接插入即可
count++;}
else
//如果記憶體池大小大於max，直接釋放current結點}}
void
contactexit
(struct presonlist *
*node)
//直接釋放所有的鍊錶結點
}void
pooldelete
(void
)//刪除記憶體池
}struct presonlist *
findperson
(struct presonlist *node,
char
*str)
if(sear !=
null
)//如果不為空
else
}else
}void
changperson
(struct presonlist *node,
char
*str1,
char
*str2)
if(sear !=
null
)elseif(
!strcmp
(sear->number, str1)
)//不然就是**號碼
else
}else
}void
welcome
(void
)int
main
(void);
char change[
100]=;
welcome()
;while(1
)break
;case
'3':
printf()
;scanf_s
("%s"
, change,
sizeof
(change));
delperson
(&node, change)
;printf
("count:%d\n"
,count)
;break
;case
'4':
displaycontact
(node)
;break
;case
'5':
printf
("請輸入需要更改的名字/**號碼\n");
memset
(input,0,
sizeof
(input));
scanf_s
("%s"
, input,
sizeof
(input));
printf
("請輸入更改後的名字/**號碼\n");
scanf_s
("%s"
, change,
sizeof
(change));
changperson
(node, input, change)
;printf
("更改後的聯絡人列表:\n");
displaycontact
(node)
;break
;case
'6':
contactexit
(&node)
;pooldelete()
;printf
("已刪除所有列表\n");
welcome()
;break
;case
'7':
return0;
}}

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