c语言addtail函数 c语言add
c语言编程
#include stdio.h
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#include stdlib.h
#include malloc.h
#include string.h
struct Student
{
char name[20];
int num;
int math;
struct Student *next;
};
struct Student *Create(struct Student *head); /*生成数据链表*/
void saveList(struct Student *head); /*保存链表数据*/
void ShowList(struct Student *head); /*显示链表*/
void AddTail(struct Student *head,struct Student *temp); /*表尾添加元素(*/
struct Student *AddHead(struct Student *head,struct Student *temp); /*表头添加元素*/
struct Student *DeleteSomeone(struct Student *head); //删除元素
void FindSomeone(struct Student *head); //查询元素
void FindMax(struct Student *head,); /*查找并输出 math最大节点的信息*/
void FindMin(struct Student *head,); /*查找并输出 math最小节点的信息 */
void Average(struct Student *head,); /*统计链表节点总数及 math的平均 */
void main()
{
struct Student *head=NULL,*temp=NULL;
int choice;
do
{
printf("1:创建数据链表\n");
printf("2:添加链表单元\n");
printf("3:删除链表单元\n");
printf("4:查询链表单元\n");
printf("5:退出\n");
printf("请输入功能选择：");
scanf("%d",choice);
if(choice==1)
{
head=Create(temp);
ShowList(head);
saveList(head);
}
else if(choice==2)//表头添加元素
{
temp=(struct Student*)malloc(sizeof(struct Student));
printf("姓名:"); scanf("%s",temp-name);
printf("学号:"); scanf("%d",temp-num);
printf("成绩:"); scanf("%d",temp-math);
head=AddHead(head,temp);// head=AddTail(head,temp);
ShowList(head);
saveList(head);
}
else if(choice==3) //删除元素
{
head=DeleteSomeone(head);
ShowList(head);
saveList(head);
}
else if(choice==4) //查找元素
FindSomeone(head);
else if(choice==5)
printf("谢谢使用!\n");
else
printf("非法输入,请输入1～5之间的数!\n");
}while(choice!=5);
}
struct Student *Create(struct Student *head) //不包含打开文件
{
struct Student *pS,*pEnd;
while(1)
{
pS=(struct Student*)malloc(sizeof(struct Student));
printf("姓名:");
scanf("%s",pS-name);
if(strcmp(pS-name,"000"))
{
printf("学号:");
scanf("%d",pS-num);
printf("成绩:");
scanf("%d",pS-math);
}
else
break;
if(head==NULL)
head=pS;
else
pEnd-next=pS;
pEnd=pS;
}
pEnd-next=NULL;
delete pS;
return (head);
}
void ShowList(struct Student *head)//显示链表上的数据
{
printf("学生姓名，成绩如下:\n");
while(head)
{
printf("%20s",head-name);
printf("%6d",head-num);
printf("%3d\n",head-math);
head=head-next;
}
}
void saveList(struct Student *head)//保存链表上的数据
{
FILE *fp;
fp=fopen("e:\\list.txt","w");
if(fp==NULL)
{
printf("无法创建文件e:\\list.txt!");
return;
}
while(head)
{
fprintf(fp,"%s %d %d\n",head-name,head-num,head-math);
head=head-next;
}
fclose(fp);
}
void AddTail(struct Student *head,struct Student *temp)//加在表尾
{
struct Student *last;
while(head)
{
last=head;
head=head-next;
}
last-next=temp;
temp-next=NULL;
}
struct Student *AddHead(struct Student *head,struct Student *temp)//加在表头
{
struct Student *oldhead;
oldhead=head;
head=temp;
head-next=oldhead;
return head;
}
struct Student *DeleteSomeone(struct Student *head)
{
struct Student *temp;
int xnum,flag=0;
printf("请输入学号:");
scanf("%d",xnum);
if(head==NULL)
{
printf("表为空!")
return head;
}
if(head-num==xnum)
{
temp=head;
head=head-next;
delete temp;
return head;
}
struct Student *first=head;
while(head)
{
if(head-next==NULL)
break;
if(head-next-num==xnum)
{
temp=head-next;
head-next=temp-next;
delete temp;
flag=1;
break;
}
head=head-next;
}
if(flag==0)
printf("未发现!")
return first;
}
void FindSomeone(struct Student *head)//按学号查找
{
int xnum,flag=0;
printf("请输入学号:");
scanf("%d",xnum);
while(head)
{
if(head-num==xnum)
{
printf("%20s",head-name);
printf("%6s",head-num);
printf("%3d",head-math);
flag=1;
break;
}
head=head-next;
}
if(flag==0)
printf("未发现!");
}
C语言生产者消费者进程代码问题
实现一个队列CQueue CQueue提供两个公有成员函数 addTail()：往队列尾部增加一个元素 removeHead()：读出并移除队列的第一个元素 生产者：两个线程通过调用CQueue::addTail()往队列中增加元素 消费者：一个线程通过调用CQueue::removeHead()从队列中读取元素 #include iostream #include list #include windows.h #include process.h using namespace std; #define P(sem) WaitForSingleObject(sem,INFINITE) #define V(sem) ReleaseSemaphore(sem,1,NULL) class CQueue { public: void addTail();//往队列尾部增加一个元素 void removeHead();//读出并移除队列的第一个元素 private: listint L; }; CQueue buffer;//全局的缓冲区 const int buf_size = 10;//缓冲区大小 static int GOODS_ID = 0;//商品序号 const int producers = 3;//生产者数量 const int consumers = 8;//消费者数量 void ProducerThread(void* param); void ConsumerThread(void* param); HANDLE empty,occupy,op_mutex; int main() { int i; int p_id[producers],c_id[consumers];
c语言单链表问题，请问这个那里错了，本人菜鸟，下面是程序
不知道你有没有调这个程序，很明显的错误是调用SearchX(H);和InsertList(H);这2个函数时，参数少了，你的实现里SearchX有2个参数，InsertList有3个参数，那你调用肯定要传递足够的参数，其实也容易理解：你查找时（即Search时）传递一个链表头，自然也需要一个查找的数据；插入时（即insert时）需要一个表头，一个数据和一个插入位置。
之前写的一个程序，带测试信息，给你参考：我这里是用的全局节点变量，所有在插入时只传了2个参数，一个target目标（不是位置，换成指定位置更简单），一个数据：
#include stdio.h
#include stdlib.h
typedef struct LinkNode
{
int data;
struct LinkNode *next;
}link,*plink;
plink head = NULL;
void addfront()
{
int value;
plink s,p;
printf("please enter the value\n");
scanf("%d",value);
s = malloc(sizeof(link));
if(s==NULL)
{
printf("memory error\n");
return;
}
s-data = value;
if(head == NULL)
{
head = s;
s-next = NULL;
}else{
p = head;
head = s;
s-next = p;
}
}
void addtail()
{
int value;
plink s,p;
s = malloc(sizeof(link));
if(s==NULL)
{
printf("memory error\n");
return;
}
printf("please enter the value\n");
scanf("%d",value);
s-data = value;
if(head == NULL)
{
head = s;
s-next = NULL;
}else{
p = head;
while(p-next != NULL)
{
p = p-next;
}
p-next = s;
s-next = NULL;
}
}
void addAll()
{
int count,i;
printf("please enter the count\n");
scanf("%d",count);
for(i=0;icount;i++)
{
addtail();
}
}
void display()
{
plink p;
p = head;
while(p)
{
printf("%3d",p-data);
p = p-next;
}
printf("\n");
}
plink search(int data)
{
int i = 0;
plink p;
if(head == NULL)
{
printf("single link is empty\n");
return NULL;
}
p = head;
while(p != NULL)
{
i++;
if(p-data == data)
{
printf("the number %d is at %d\n",data,i);
return p;
}else
{
p = p-next;
}
}
return NULL;
}
void insert(int target,int insertvalue)
{
plink p, q, s;
if(head == NULL)
{
printf("single link is empty\n");
return ;
}
s = (plink)malloc(sizeof(link));
if(s == NULL)
{
printf("memory error!\n");
return ;
}
s-data = insertvalue;
if(head-data == target)
{
s-next = head;
head = s;
return;
}else
{
p = q = head;
while(p != NULL)
{
if(p-data == target)
{
q-next = s;
s-next = p;
printf("insert successful\n");
return ;
}else
{
q = p;
p = p-next;
}
}
}
printf("insert failed!\n");
}
void delete(int data)
{
plink p, q;
if(head == NULL)
{
printf("single link is empty\n");
return ;
}
if(head-data == data)
{
p = head-next;
free(head);
head = p;
printf("delete successful\n");
return;
}else
{
p = q = head;
while(p != NULL)
{
if(p-data == data)
{
q-next = p-next;
free(p);
printf("delete successful\n");
return ;
}else
{
q = p;
p = p-next;
}
}
}
printf("delete failed!\n");
}
void deleteAll(int data)
{
plink p, q;
if(head == NULL)
{
printf("single link is empty\n");
return ;
}
p = q = head;
while(p != NULL)
{
if(head-data == data)
{
p = head-next;
free(head);
head = p;
}else if(p-data == data)
{
q-next = p-next;
free(p);
p = q-next;
}else
{
q = p;
p = p-next;
}
}
}
int main(void)
{
int operation;
printf("please enter your operation\n");
do{
printf("\t1.add a number at the first\n");
printf("\t2.add a number at the last\n");
printf("\t3.add multi number\n");
printf("\t4.display the singlelink\n");
printf("\t5.search a number\n");
printf("\t6.insert the insertvalue at the target\n");
printf("\t7.delete the value\n");
printf("\t8.delete all of the value\n");
printf("\t9.quit\n");
scanf("%d",operation);
switch(operation)
{
case 1:addfront();break;
case 2:addtail();break;
case 3:addAll();break;
case 4:display();break;
case 5:
{int value;
printf("enter the search number\n");
scanf("%d",value);
search(value);break;}
case 6:
{int target,insertvalue;
printf("enter the target and insertvalue \n");
scanf("%d%d",target,insertvalue);
insert(target,insertvalue);}
break;
case 7:
{int value;
printf("enter the value to delete \n");
scanf("%d",value);
delete(value);}
break;
case 8:
{int value;
printf("enter the value to delete all \n");
scanf("%d",value);
deleteAll(value);}
break;
case 9:return;
default:printf("error input\n");
}
}while(1);
}
C语言处理中文文本的问题，利用队列
用C++实现了一个，但是代码很乱，惨不忍睹，LZ勉强看一下吧……====================================#includestdio.h
#include
string.hconst
int
MAX_QUEUE_SIZE
=
1024;
int
g_nCount
=
0; //当前队列总数
int
g_nCurIndex
=
0; //当前出队列索引
char
*g_pStrQueue[MAX_QUEUE_SIZE]
=
{0};//入队列
void
AddTail(char
*pszText)
{
if
(g_nCount
==
MAX_QUEUE_SIZE)
{
printf("队列已满！\n");
return;
} int
nStrLen
=
strlen(pszText);
//如果所添加的字符串都是空格则不入队列
bool
fFind
=
false;
for
(int
i
=
0;
i
nStrLen;
i
++)
{
if
(pszText[i]
!=
'
')
{
fFind
=
true;
break;
}
}
if
(!fFind)
{
return;
} g_pStrQueue[g_nCount]
=
new
char[nStrLen
+
1]; if
(g_pStrQueue[g_nCount])
{
strcpy(g_pStrQueue[g_nCount],
pszText);
g_nCount++;
}
else
{
printf("内存申请失败！\n");
}
}//出队列
void
GetHead(char
*pszText)
{
if
(g_nCurIndex
==
g_nCount)
{
printf("队列为空！\n");
return;
}
strcpy(pszText,
g_pStrQueue[g_nCurIndex]);
delete
[]
g_pStrQueue[g_nCurIndex];
g_pStrQueue[g_nCurIndex]
=
NULL;
g_nCurIndex++;
}//取队列当前元素个数
int
GetQueueSize()
{
return
g_nCount
-
g_nCurIndex;
}//清空队列
void
ClearQueue()
{
for
(int
i
=
0;
i
MAX_QUEUE_SIZE;
i
++)
{
if
(g_pStrQueue[i])
{
delete
[]
g_pStrQueue[i];
g_pStrQueue[i]
=
NULL;
}
}
g_nCurIndex
=
0;
g_nCount
=
0;
}void
main()
{
const
int
nMaxFileLen
=
102400;
int
nFileLen
=
0;
char
*pszText
=
new
char[nMaxFileLen];
FILE
*pFile
=
fopen("a.txt",
"r"); ClearQueue(); if
(!pFile)
{
printf("文件打开失败！\n");
return;
}
if
(!pszText)
{
printf("内存申请失败！");
return;
}
memset(pszText,
0,
nMaxFileLen); nFileLen
=
fread(pszText,
1,
nMaxFileLen,
pFile);
fclose(pFile); pFile
=
fopen("output.txt",
"w");
if
(!pFile)
{
printf("文件打开失败！\n");
return;
} char
*nPos1
=
NULL,
*nPos2
=
NULL;
char
szBuff[1024];
nPos1
=
strstr(pszText,
"[");
nPos2
=
pszText; while
(nPos1
!=
NULL)
{
char
*pTmpPos1,
*pTmpPos2;
memset(szBuff,
0,
1024);
memcpy(szBuff,
nPos2,
nPos1
-
nPos2);
AddTail(szBuff);
//[*]左边
nPos2
=
strstr(nPos1,
"]");
if
(nPos2
==
NULL)
{
break;
} memset(szBuff,
0,
1024);
memcpy(szBuff,
nPos1,
nPos2
-
nPos1
+
1);
pTmpPos1
=
strstr(nPos2,
szBuff);
//寻找[*]
if
(pTmpPos1
==
NULL)
{
break;
} pTmpPos1
+=
strlen(szBuff);
pTmpPos2
=
strstr(pTmpPos1,
"\n");
if
(pTmpPos2
==
NULL)
{
pTmpPos2
=
pszText
+
strlen(pszText);
} memset(szBuff,
0,
1024);
memcpy(szBuff,
pTmpPos1,
pTmpPos2
-
pTmpPos1);
AddTail(szBuff);
//[*]右边
nPos2++; nPos1
=
strstr(nPos2,
"[");
char
*pTemp
=
strstr(pszText,
"\n");
if
(nPos1
pTemp)
{
break;
}
}
int
nQueueCount
=
GetQueueSize();
for
(int
i
=
0;
i
nQueueCount;
i+=2)
{
char
szStr[1024]
=
{0};
memset(szBuff,
0,
1024);
GetHead(szBuff);
strcat(szStr,
szBuff);
strcat(szStr,
"
");
memset(szBuff,
0,
1024);
GetHead(szBuff);
strcat(szStr,
szBuff);
strcat(szStr,
"\r\n");
fwrite(szStr,
1,
strlen(szStr),
pFile);
printf(szStr);
}
fclose(pFile);
}
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