C语言图书管理系统

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
typedef int BOOL;
typedef struct bookinfo
{
    char number[15];/*产品编号*/
    char name[30];/*产品名称*/
    float price;/*单价*/
    char auther[20];/*作者*/
    BOOL isExit;/*存在状态*/
    char lendername[20];/*借书人姓名*/
    char lendersex[2];/*借书人性别*/
    char lendernum[15];/*借书人学号*/
}BOOKINFO;
void menu()
{
    printf("\n\n\n\n\n\n\n");
    printf("\t\t\t图书管理系统\n");
    printf("\t\t\t1:新进图书基本信息的输入\n");
    printf("\t\t\t2:显示全部记录\n");
    printf("\t\t\t3:根据图书名称查询图书基本信息\n");
    printf("\t\t\t4:根据图书名称对撤销的图书信息进行删除\n");
    printf("\t\t\t5:按照图书名称从小大到排序\n");
    printf("\t\t\t6:统计某价格以上的图书数量\n");
    printf("\t\t\t7:列出所有未借出去的图书信息\n");
    printf("\t\t\t8:退出\n");
    }
void choice_1_input_new()/*输入新进的图书信息*/

{
    char choice;
    FILE *p;
    BOOKINFO newbook;
    system("cls");
    while(1)
      {
      printf("输入图书编号:");
      gets(newbook.number);
          
      printf("输入图书名称:");
      gets(newbook.name);    
      
      printf("输入图书单价:");
      scanf("%f",&newbook.price);
      while(getchar()!='\n');
          
      printf("输入图书的作者:");
      gets(newbook.auther);    
      
      printf("输入借书人姓名:");
      gets(newbook.lendername);    
      
      printf("输入借书人性别:");
      gets(newbook.lendersex);    
      
      printf("输入借书人学号:");
      gets(newbook.lendernum);
      
      printf("是否保存该条书目?(Y/N)\n");