分给我，钱就不用了。
#include <string.h>
#define FORMAT "\n%-8d%-8d%-7d%-8d%-7d%-8d%-10s%-9s%-9s\n"
#include <stdio.h>
#include <conio.h>
#include <malloc.h>
#define NULL 0
#define N 100
#define LEN sizeof(struct book)
int M
struct book
{int Enum
int Cnum
char name[10]
char author[10]
char publishor[30]
struct date
{int year
int month
int day}time
int price
struct book*next
}go[N]
void print()
{printf("---------------------------------------------------------------------------\n")
printf("EnumCnumyear month daypricename authorpublishor\n")
printf("---------------------------------------------------------------------------\n")
}
void load()
{FILE *fp
int i
if((fp=fopen("book_list","rb"))==NULL)
{printf("cannot open file\n")
return
}
i=0
while((fread(&go[i],sizeof(struct book),1,fp))!=NULL)
{i++}
M=i
fclose(fp)
}
void save(int h)
{FILE *fp
int i
if ((fp=fopen("BOOK_LIS","wb"))==NULL)
{printf("cannot open file\n")
return
}
for (i=0i<hi++)
if(fwrite(&go[i],sizeof(struct book),1,fp)!=1)
printf("file write error\n")
fclose(fp)
}
void f1()
{FILE *fp
int i=0
fp=fopen("book_list","rb")
print()
while((fread(&go[i],sizeof(struct book),1,fp))!=NULL)
{printf(FORMAT,go[i].Enum,go[i].Cnum,go[i].time.year,go[i].time.month,go[i].time.day,go[i].price,go[i].name,go[i].author,go[i].publishor)
i++
}
fclose(fp)
getch()
}
void f2(int h)
{int i
printf("please input %d book's information\n",h)
printf("Enum Cnum yearmonth dayprice nameauthor publishor\n")
for(i=0i<hi++)
{printf("Enum:\n")
scanf("%d",&go[i].Enum)
printf("Cnum:\n")
scanf("%d",&go[i].Cnum)
printf("please input year month day\n")
scanf("%d%d%d",&go[i].time.year,&go[i].time.month,&go[i].time.day)
printf("price:\n")
scanf("%d",&go[i].price)
printf("name:\n")
scanf("%s",go[i].name)
printf("author:\n")
scanf("%s",go[i].author)
printf("publishor:\n")
scanf("%s",go[i].publishor)
}
save(h)
return
}
void f3()
{int i
struct book
char a[20],b[20],c[20]
load()
printf("please input 'name' or 'author':\n")
scanf("%s",a)
if(strcmp(a,"name")==0)
{printf("please input the book's name:\n")
scanf("%s",b)
for(i=0i<Mi++)
if(strcmp(b,go[i].name)==0)
{print()
printf(FORMAT,go[i].Enum,go[i].Cnum,go[i].time.year,go[i].time.month,go[i].time.day,go[i].price,go[i].name,go[i].author,go[i].publishor)
}
}
else
{printf("please input the book's author:\n")
scanf("%s",c)
for(i=0i<Mi++)
if(strcmp(c,go[i].author)==0)
{print()
printf(FORMAT,go[i].Enum,go[i].Cnum,go[i].time.year,go[i].time.month,go[i].time.day,go[i].price,go[i].name,go[i].author,go[i].publishor)
}
}
return
}
void f4()
{int i,j,k
struct book t
load()
for(i=0i<Mi++)
{k=i
for(j=i+1j<Mj++)
if(go[k].price>go[j].price)k=j
t=go[i]go[i]=go[k]go[k]=t
}
print()
for(i=0i<Mi++)
printf(FORMAT,go[i].Enum,go[i].Cnum,go[i].time.year,go[i].time.month,go[i].time.day,go[i].price,go[i].name,go[i].author,go[i].publishor)
}
void f5()
{FILE *fp
int i,j,M,flag
char name[10]
if((fp=fopen("book_list","rb"))==NULL)
{printf("cannot open file\n")
return
}
printf("\norriginal data:\n")
print()
for(i=0fread(&go[i],sizeof(struct book),1,fp)!=0i++)
printf(FORMAT,go[i].Enum,go[i].Cnum,go[i].time.year,go[i].time.month,go[i].time.day,go[i].price,go[i].name,go[i].author,go[i].publishor)
M=i
printf("\n input the deleted name:\n")
scanf("%s",name)
for(flag=1,i=0flag&&i<Mi++)
{if(strcmp(name,go[i].name)==0)
{for(j=ij<M-1j++)
{go[j].Enum=go[j+1].Enum
go[j].Enum=go[j+1].Enum
strcpy(go[j].name,go[j+1].name)
strcpy(go[j].author,go[j+1].author)
strcpy(go[j].publishor,go[j+1].publishor)
go[j].time.year=go[j+1].time.year
go[j].time.month=go[j+1].time.month
go[j].time.day=go[j+1].time.day
go[j].price=go[j+1].price
}
flag=0
}
}
if(!flag)
M=M-1
else
printf("not found!\n")
printf("\nNow,the content of file:\n")
fp=fopen("book_list","wb")
for(i=0i<Mi++)
fwrite(&go[i],sizeof(struct book),1,fp)
fclose(fp)
fp=fopen("book_list","wb")
for(i=0fread(&go[i],sizeof(struct book),1,fp)!=0i++)
printf(FORMAT,go[i].Enum,go[i].Cnum,go[i].time.year,go[i].time.month,go[i].time.day,go[i].price,go[i].name,go[i].author,go[i].publishor)
fclose(fp)
}
main()
{int i,h
clrscr()
while(1)
{printf ("\n 1 is a project that can output all information.\n")
printf ("\n 2 is a project that can add any book's information.\n")
printf ("\n 3 is a project that can search information.\n")
printf ("\n 4 is a project that can sort.\n")
printf ("\n 5 is a project that can del.\n")
printf ("\n 6 is a project that can leave.\n")
printf("please input number:1 or 2 or 3 or 4 or 5 or 6\n")
scanf("%d",&i)
switch (i)
{case 1:f1()break
case 2:
{printf ("if you want to add book's information,please input a data:h=")
scanf("%d",&h)
f2(h)}break
case 3:
{f3()getch()}break
case 4:{f4()getch()}break
case 5:{f5()getch()}break
case 6:exit (1)
}
clrscr()}
}
是属于正常现象。java图书管理系统录入不显示汉语是属于正常现象。Java是一门面向对象编程语言，不仅吸收了C++语言的各种优点，还摒弃了C++里难以理解的多继承、指针等概念，因此Java语言具有功能强大和简单易用两个特征。import java.io.Fileimport java.io.FileOutputStream
import java.util.ArrayList
import java.util.List
import java.util.Scanner
import org.dom4j.Document
import org.dom4j.DocumentHelper
import org.dom4j.Element
import org.dom4j.io.OutputFormat
import org.dom4j.io.SAXReader
import org.dom4j.io.XMLWriter
public class Book {
private int no
private String name
private double value
public Book() {
}
public Book(int no, String name, double value) {
this.no = no
this.name = name
this.value = value
}
public double getValue() {
return value
}
public void setValue(double value) {
this.value = value
}
public String getName() {
return name
}
public void setName(String name) {
this.name = name
}
public int getNo() {
return no
}
public void setNo(int no) {
this.no = no
}
}
class BookList {
private List<Book> bookList
public BookList() {
bookList = readXML()
}
public long getCount() {
return bookList.size()
}
public List<Book> getBookList() {
return bookList
}
public void setBookList(List<Book> bookList) {
this.bookList = bookList
}
public void add(Book book) {
bookList.add(book)
}
public boolean delete(String name) {
Book book = query(name)
return bookList.remove(book)
}
public void update(Book bookBefore, Book bookAfter) {
bookList.remove(bookBefore)
add(bookAfter)
}
public Book query(String name) {
Book temp = null
for (Book book : bookList) {
if (book.getName().equals(name)) {
temp = book
}
}
return temp
}
public synchronized void writeXmlDocument(Book book) {
try {
File file = new File("D:\\book.xml")
Document document = null
Element root = null
if (!file.exists()) {
// 新建student.xml文件并新增内容
document = DocumentHelper.createDocument()
root = document.addElement("Books")//添加根节点
} else {
SAXReader saxReader = new SAXReader()
document = saxReader.read(file)
root = document.getRootElement()//获得根节点
}
Element secondRoot = root.addElement("Book")//二级节点
//为二级节点添加属性，属性值为对应属性的值
secondRoot.addElement("no").setText(book.getNo() + "")
secondRoot.addElement("name").setText(book.getName() + "")
secondRoot.addElement("value").setText(book.getValue() + "")
OutputFormat format = OutputFormat.createPrettyPrint()
format.setEncoding("GBK")
XMLWriter writer = new XMLWriter(new FileOutputStream("D:\\book.xml"), format)
writer.write(document)
writer.close()
document.clearContent()
} catch (Exception e) {
e.printStackTrace()
}
}
public synchronized List<Book> readXML() {
List<Book> list = new ArrayList<Book>()//创建list集合
File file = null
try {
file = new File("D:\\book.xml")//读取文件
if (file.exists()) {
SAXReader saxReader = new SAXReader()
Document document = saxReader.read(file)
List nodeList = document.selectNodes("Books/Book")
for (int i = 0 i < nodeList.size() i++) {
Element el = (Element) nodeList.get(i)
Book book = new Book()
book.setNo(Integer.parseInt(el.elementText("no")))
book.setName(el.elementText("name"))
book.setValue(Double.parseDouble(el.elementText("value")))
list.add(book)
}
}
} catch (Exception e) {
e.printStackTrace()
}
return list
}
}
class Test {
public static void main(String args[]) {
BookList bl = new BookList()
boolean bBreak = true
while (bBreak) {
System.out.println("请输入操作代码:")
System.out.println("1：添加 2：删除 3：修改 4：查询 5:书籍统计 6：退出")
Scanner sc = new Scanner(System.in)
int code = sc.nextInt()
if (code == 1) {
System.out.println("请输入编号")
int no = sc.nextInt()
System.out.println("请输入书名")
String name = sc.next()
System.out.println("请输入售价")
double value = sc.nextDouble()
Book book = new Book(no, name, value)
bl.add(book)
bl.writeXmlDocument(book)
} else if (code == 2) {
System.out.println("请输入要删除的书籍名")
String name = sc.next()
if (bl.delete(name)) {
System.out.println("删除成功")
} else {
System.out.println("书籍不存在")
}
} else if (code == 3) {
System.out.println("请输入要修改的书籍名")
String name = sc.next()
Book bookBefore = bl.query(name)
System.out.println("请输入新的编号")
int newNo = sc.nextInt()
System.out.println("请输入新的书名")
String newName = sc.next()
System.out.println("请输入新的售价")
double value = sc.nextDouble()
Book bookAfter = new Book(newNo, newName, value)
bl.update(bookBefore, bookAfter)
} else if (code == 4) {
System.out.println("请输入要查询的书籍名")
String name = sc.next()
Book book = bl.query(name)
System.out.println("编号：" + book.getNo() + " 书名：" + book.getName() + " 售价：" + book.getValue())
} else if (code == 5) {
List<Book> list = bl.getBookList()
System.out.println("总书籍数：" + bl.getCount())
for (Book book : list) {
System.out.println("编号：" + book.getNo() + " 书名：" + book.getName() + " 售价：" + book.getValue())
}
} else if (code == 6) {
bBreak = false
}
}
}
}
jar 包 dom4j.jar jaxen-1.1.4.jar
![Golang nethttp 爬虫[1]](/aiimages/Golang+nethttp+%E7%88%AC%E8%99%AB%5B1%5D.png)
