图书管理系统代码部分

char time[100];
float price;
char status[100];
struct link *next; }link;
link *Cbook()
{
int n=0;
link *p,*q,*head;
FILE *fp;
fp=fopen("图书信息.txt","r+");
printf("\n*●[0]退出系统 *\n");
printf("\n┃ ┃\n");
printf("\n*●[1]进入系统 *\n");
printf("\n┃ ┃\n");
fscanf(fp,"%f",&p->price);
fscanf(fp,"%s"p->status);
q->next=p;
}
}
p->next=NULL;
fclose(fp);
printf("信息已录入!!!");
printf("\n* 2.按编号查询图书 *\n");
printf("\n* 3.按书名查询图书 *\n");
printf("\n* 4.按作者查询图书 *\n");
printf("\n* 5.返回上级菜单 *\n");
printf("\n┗━━━━━━━━━━━━━━━━━━━━━━━━━━━┛\n");
printf("\n请选择:");
}
void menu1()
{
printf("\n┏━━━━ ━━ ━ ━ ━━ ━ ━━ ━ ━ ━┓\n");
printf("\n* 1.图书查询 *\n");
return head;
}
void mainmenu()
{
printf("\n┏━━━━ ━━ ━ ━ ━━ ━ ━━ ━ ━ ━┓\n");
printf("\n* 图书管理系统 *\n");
printf("\n┗━━━ ━━ ━ ━ ━ ━ ━ ━ ━ ━━━━━━┛\n");
if(fp==NULL)
{
printf("文件操作出错!!!");
exit(1);
}
p=head;
for(;p!=NULL;p=p->next)
{
fprintf(fp,"%s\t%s\t%s\t%s\t%s",p->number,p->bookname,p->author,p->publish,p->time);
{
char key[100];
link *h,*t1=NULL;
printf("请输入图书的编号：");
getchar();
gets(key);
for(h=head;h!=NULL;h=h->next)
{
if(strcmp(key,h->number)==0)
fprintf(fp,"\n编号\t\t书名\t\t作者\t\t出版社\t\t出版时间\t\t价格\t\t状态\n");
fprintf(fp,"\n");
fprintf(fp,"%s\t%s\t%s\t%s\t%s",p->number,p->bookname,p->author,p->publish,p->time);
while(p!=NULL)
{
printf("\n");
printf("%s\t%s\t%s\t%s\t%s",p->number,p->bookname,p->author,p->publish,p->time);
printf("\t\t%.2f",p->price);
{
t1=h;
break;
}
}
return t1;
}
link *findbookname(link *head)
{
char key[100];
link *h,*t2=NULL;
printf("请输入图书的书名：");
fprintf(fp,"\t\t%.2f",p->price);
fprintf(fp,"\t\t%s",p->status);
fprintf(fp,"\n");
fclose(fp);
printf("信息已保存！！！");
}
link *findnumber(link *head)
}
return t2;
}
link *findauthor(link *head)
{
char key[100];
link *h,*t3=NULL;
printf("请输入作者姓名：");
getchar();
gets(key);
for(h=head;h!=NULL;h=h->next)
#include <stdio.h>
#include <string.h>
#include<stdlib.h>
typedef struct link //定义结构体
{
char number[100];
char bookname[100];
char author[100];
char publish[100];
{
if(strcmp(key,h->author)==0)
{
t3=h;
break;
}
}
return t3;
}
link *sortnumber(link *head)
{
link *p,*q,*temp;
temp=(link *)malloc(sizeof(link));
if(temp==NULL)
{
printf("申请内存出错!!!");
exit(1);
}
for(p=head;p!=NULL;p=p->next)
{
for(q=p->next;q!=NULL;q=q->next)
{
if(strcmp(p->number,q->number)>0)
{
strcpy(temp->number,p->number);
else
{
q=p;
p=(link *)malloc(sizeof(link));
if(p==NULL)
printf("申请内存出错!!!\n");
fscanf(fp,"%s%s%s%s%s",p->number,p->bookname,p->author,p->publish,p->time);
printf("\n┗━━━━━━━━━━━━━━━━━━━━━━━━━┛\n");
printf("\n请选择:");
}
void cxmenu()
{
printf("\n┏━━━━ ━━ ━ ━ ━━ ━ ━━ ━ ━ ━┓\n");
printf("\n* 1.显示所有图书信息 *\n");
printf("\n* 2.图书借还 *\n");
printf("\n* 3.保存信息 *\n");
printf("\n* 4.返回上级菜单 *\n");
printf("\n* 2.还书 *\n");
printf("\n* 3.返回上级菜单 *\n");
printf("\n┗━━━━━━━━━━━━━━━━━━━━━━━━━┛\n");
printf("\n请选择:");
fprintf(fp,"\t\%.2f",p->price);
fprintf(fp,"\t\t%s",p->status);
fprintf(fp,"\n");
}
fclose(fp);
printf("信息已保存。");
}
void holdcx(link *t)
printf("\t\t%s",p->status);
printf("\n");
p=p->next;
}
}
void hold(link *head)
{
link *p;
FILE *fp;
fp=fopen("图书信息.txt","w+");
if(fp==NULL)
printf("没有找到文件，请检查...");
p=(link *)malloc(sizeof(link));
if(p==NULL)
printf("申请内存出错!!!\n");
fscanf(fp,"%s%s%s%s%s",p->number,p->bookname,p->author,p->publish,p->time);