c语言课程设计_图书管理系统程序

/*12. bookfunction.c源程序*/
/*** bookfunction.c***/
/*添加图书*/
#include "d:\cbook\13\c13_book.c"
void BookAdd()
{
   FILE *fp;
   Book consultbook;
   fp=fopen("book.txt","rb");/*读方式打开文件*/
   if(fp==NULL)
      fp=fopen("book.txt","wb"); /*写方式打开文件*/
   else/*如果有书就添加*/
   {
      fclose(fp);
      fp=fopen("book.txt","ab");/*追加方式打开文件*/
   }
   ClrScr();/*清屏*/
   printf("Intput new book num: ");/*逐个输入新图书的资料*/
   gets(consultbook.num);
   gotoxy(2,4);
   printf("Input new book name: ");
   gets(consultbook.name);
   gotoxy(2,5);
   printf("Please input new book's price: ");
   scanf("%d%*c",&consultbook.price);
   strcpy(consultbook.person,"");
   consultbook.yes=1;/*表示书存在未借出*/
   consultbook.next=NULL;
   fwrite(&consultbook,sizeof(Book),1,fp);/*块写*/
   fclose(fp); /*关闭文件*/
   ClrScr();
}
/*图书查询*/
void BookConsult()
{
   FILE *fp;
   Book consultbook;
   char bookname[20]; /*书名*/
   int flag=0,i=0;
   ClrScr();
   gotoxy(2,3);
   printf("Input the book name: ");
   gets(bookname); /*输入要查询的图书名*/
   fp=fopen("book.txt","rb");
   if(fp==NULL)/*没找到文件*/
   {
      ClrScr();
      gotoxy(2,3);
      printf("Error!");
      fclose(fp);
      return;
   }
   else
      while(!feof(fp))/*查询图书资料*/
      {
  fread(&consultbook,sizeof(Book),1,fp);
  if(strcmp(consultbook.name,bookname)==0)/*如果查找到*/
  {
     ClrScr();
     gotoxy(2,3+i*5);
     printf("This book %s information as follow:",consultbook.name);
     gotoxy(2,4+i*5);
     printf("This book num is %s",consultbook.num);
     gotoxy(2,5+i*5);
     printf("This book's price is %d",consultbook.price);
     gotoxy(2,6+i*5);
     printf("This book's  is browwed by %s",consultbook.person);
     gotoxy(2,7+i*5);
     printf("This book's state is %d",consultbook.yes);
     i++;
     flag=1; /*查找数据标志*/
  }
      }
   if(flag==0)
   {
      ClrScr();
      gotoxy(2,3);
      printf("No found this book");
   }
   fclose(fp);
}
/*删除图书资料*/
void BookDel()
{
   FILE *fp;
   Book *head,*p,*q;
   char bookname[20];
   fp=fopen("book.txt","rb");/*读方式打开文件*/
   if(fp==NULL)/*没找到文件*/
   {
      gotoxy(2,3);
      printf("Error!");
&n