#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define SIZE 5
struct book_type
{
    char name[15];
    char author[15];
    int date;
    int pages;
    float price;
}book[SIZE];
void input();
void searching();
void output();
void save();
void order();

int num;

int main()
{   while(1)
    {  printf("******************************************\n");
       printf("欢迎使用图书数据库系统\n");
       printf("请根据以下提示进行操作\n");
       printf("录入图书信息请输入数字1\n");
       printf("搜索图书请输入数字2\n");
       printf("输出所有图书的信息请输入数字3\n");
       printf("退出系统请输入数字0\n");
       printf("******************************************\n");
        switch(getchar())
        {
               
                case'1': input();    break;
                case'2': searching();break;
                case'3': output();   break;
                case'0': exit(0);
        }
    }
  
     return 0;

}

void input()
{    int i=0,YN=0;
     while(i<SIZE)
     {   printf("******请录入图书的信息******\n");
         printf("书名  作者  出版年份  页数  价格\n");
         scanf("%15s%15s%d%d%f",book[i].name,book[i].author,book[i].date,
               &book[i].date,&book[i].pages,&book[i].price);
         printf("继续录入? \nY(1) N(0)\n");
         scanf("%d",&YN);
         if(YN==0)break;
         i++;
     }
     order();
     save();
     return;
}

void save()
{
    FILE*fp;
    int i;
    fp=fopen("book_list","wb");
    for(i=0;i<SIZE;i++)
    {
        if(fwrite(&book[i],sizeof(struct book_type),1,fp)!=1)
        printf("file write error\n");
    }
    printf("\nfile save\n");
    fclose(fp);
    return;
   
}

void output()
{
    FILE *fp;
    int i;
    fp=fopen("book_list","rb");
    printf("书名   作者   出版年份   页数   价格\n");
    for(i=0;i<SIZE;i++)
    {
        fread(&book[i],sizeof(struct book_type),1,fp);
        printf("%-15s%-15s%-6d%-6d%-6d\n",book[i].name,book[i].author,book[i].date,
               &book[i].date,&book[i].pages,&book[i].price);
    }
    fclose(fp);
    return;
}

void searching()
{
    char nm[15];
    int i,aa;
    FILE*fp;
    fp=fopen("book_list","rb");
    for(i=0;i<SIZE;i++)
    {
       fread(&book[i],sizeof(struct book_type),1,fp);   
    }
    printf("请输入书名\n");
    scanf("%s",nm);
    for(i=0;i<SIZE;i++)
       if(strcmp(nm,book[i].name)==0)
        {   printf("***************************************");
            printf("书名   作者   出版年份   页数   价格\n");
            printf("%-15s%-15s%-6d%-6d%-6d\n",book[i].name,book[i].author,
            &book[i].date,&book[i].pages,&book[i].price);
            printf("***************************************");
            break;
        }
   return;   
}

void order()
{   
    struct book_type chane;
    int i,j;
    for(j=0;j<SIZE;j++)
     for(i=0;i<SIZE-j;i++)
     if(book[i].date>book[i+1].date)
     {  
        
         strcpy(chane.name,book[i].name);strcpy(chane.author,book[i].author);
        chane.date=book[i].date;chane.pages=book[i].pages;
        chane.price=book[i].price;//
        strcpy(book[i].name,book[i+1].name);strcpy(book[i].author,book[i+1].author);
        book[i].date=book[i+1].date;book[i].pages=book[i+1].pages;
        book[i].price=book[i+1].price;//
        strcpy(book[i+1].name,chane.name);strcpy(book[i+1].author,chane.author);
        book[i+1].date=chane.date;book[i+1].pages=chane.pages;
        book[i+1].price=chane.price;//
     }
     return
   
}