#include "stdio.h"
#include "stdlib.h"
#include "conio.h"
#include "string.h"
#define   SIZE 10000
#define   SIZE_stu   5000        /*學生數量*/
FILE *fp;
struct Data
{
	int year;
	int month;
	int day;
};                       /*定義日期的結構體*/
struct bookstype 
{
	int number;          /*書的編號,從1開始編號*/
	struct Data date;    /*書的出版日期*/
	char name[8];        /*書名*/
	char writer[8];      /*作者名*/
    char form[4];        /*書的類型,一般用大寫的英文字母(A-Z)表示*/
	int lend[2];         /*租借情況*/
	struct   bookstye  *next;
}books[SIZE];
struct   reader
{   
    long   stu_nub;
	char   name[10];	
	int    sum;          /*借閱統計*/     
}student[SIZE_stu];

char path();             /*進入系統的路徑設置函數*/
void input();            /*     輸入書籍         */

int  save();             /*     保存書籍         */
void output();           /*     輸出書籍         */

void seeknumber();       /*     按書號查詢       */
void seekdate();         /*     按日期查詢       */
void seekname();         /*     按書名查詢       */

void seekwriter();       /*     按作者名查詢     */
void seekform();         /*     按書的類型查詢   */
void ordernumber();      /*     按書的編號排序   */

void orderdate();        /*     按書的日期排序   */
void orderform();        /*     按書的類型排序   */
void delenumber();       /*     按書號刪除書籍   */

void  delename();         /*     按書名刪除書籍   */
int   book_borrowed();    /*     書籍借出         */
void  returnbooks();      /*     還書函數         */
int book_borrowed()
{    
     
	char   bookname[8]; 
	int    a;
	FILE *fp;
    struct  reader student[SIZE_stu];
    int i=1;
	char choice='y';
	if((fp=fopen("D:\\計035.txt","a+"))==NULL)
	{
		printf("Can't open the file!\n");
		return(0);
	}                                                     /*以讀或追加寫的方式打開文件*/
	while(choice=='y'||choice=='Y')
	{
		printf("————————請輸入您的學號:————————\n",i);
		scanf("%d",&student[i].stu_nub);
		printf("————————請輸入您的姓名:————————\n",i);
        scanf("%s",&student[i].name);
	
		printf("———     請輸入您要借閱的書籍名稱     ———\n",i);
		scanf("%s",&bookname);
        seekname();
		if(bookname==books[i].name&&books[i].lend==1)
		{
			printf("此書可以借閱!\n");
		    printf("確定借閱請選擇1，取消請選擇0\n"); 
			scanf("%d",&a);	
			delename();
			fwrite(&student[i],sizeof(struct reader),1,fp);  
		}                                                         /*將student[i]追加入磁盤文件*/
		else
			printf("對不起，您預借閱的書籍庫存已空!\n");        
        printf("是否要輸入下一讀者Y/N\n");         
		scanf("%c",&choice);
		i++;
	}
	   fclose(fp);   
}
void  returnbooks()     /*書籍歸還函數*/
{   

     
    
	




}



char path()
{
	char s[100];
	char password[]="1"; 
	                       /*字符數組password存放正確的口令1*/
    int flag=0,n=3;
	                       /*設置口令對錯標志flag,初值為0,n為允許輸入錯誤次數*/
    char choice='y';

	do
	{
		printf("請輸入口令:");
		gets(s);
		if(!(strcmp(s,password)))
		{
			printf("OK!\n");
			flag=1;  
			break;
		}
		else 
			if(n>0)
			{
				printf("輸入錯誤,請再輸一次!\n");
				n--;
			}
	}while(n>0);

	if(!flag)
	{
		printf("對不起,你不能使用該系統,再見!\n");
		exit(0);
	}
	return 1;
}
void input()
{
	FILE *fp;
    struct bookstype books[SIZE];
    int i=1;
	char choice='y';
	fp=fopen("D:\\計035.txt","a+"); 
	                                                  /*以讀或追加寫的方式打開文件*/
    while(choice=='y'||choice=='Y')
	{
		printf("————請輸入第%d本書的書號,日期,書名,作者,類別以及租借情況:————\n",i);
        printf("++++++++             請輸入第%d本書的書號:                   ++++++++\n",i);
		scanf("%d",&books[i].number);
		printf("————             請輸入第%d本書的日期:                   ++++++++\n",i);
        scanf("%d.%d.%d",&books[i].date.year,&books[i].date.month,&books[i].date.day);
		printf("請輸入書名：");
		scanf("%s",books[i].name);
		printf("請輸入書的作者:");
		scanf("%s",books[i].writer);
		printf("請輸入書的類別:");
		scanf("%s",books[i].form);
		printf("書的庫存狀態:");
		scanf("%s",books[i].lend);
		fwrite(&books[i],sizeof(struct bookstype),1,fp);
		                             /*將books[i]追加入磁盤文件*/
        printf("是否要輸入下一本書Y/N\n");
		scanf("%c",&choice);
		i++;
	}
	fclose(fp);   
}

int  save()        /*將修改過的文件結果寫到文件里*/
{
	FILE *fp;
	int i ;
	if ((fp=fopen("D:\\計035.txt","w"))==NULL)
	{
		printf("\n 不能打開輸出文件");
     	return 0;
	}
	for (i=0;i<SIZE;i++)

		if (fwrite(&books[SIZE],sizeof(struct bookstype),1,fp)!=1)
		{
			printf("\n寫文件時出錯");
			return 0;
		}
   fclose(fp);
   return 1;
}

void output()
{
	FILE *fp;
	int i,n=0;	
	struct bookstype books[SIZE];
    fp=fopen("D:\\計035.txt","r");
    if((fp=fopen("D:\\計035.txt","r"))==NULL)

	{
		printf("打開文件出錯!\n");
		return;
	}
	else
		if(fread(&books[0],sizeof(struct bookstype),1,fp)==0)
		{
			printf("庫存已空!\n");
			return;
		}
    	else
	{
        printf("顯示所有書籍:\n");
    	printf("編號        日期        書名        作者名       類型       租借情況\n");
		printf("********************************************************************\n");
        for(i=0;fread(&books[i],sizeof(struct bookstype),1,fp)!=0;i++)
		{
    		printf("%d       ",books[i].number);
    	    printf("   %d.%d.%d\t",books[i].date.year,books[i].date.month,books[i].date.day);
    		printf("%s       ",books[i].name);
    		printf("%s    ",books[i].writer);
	    	printf("%s    ",books[i].form);
	    	printf("%s    \n",books[i].lend);
		
	    	n++;                         /*統計書籍*/
		}
       printf("********************************************************************\n");
	}
	fclose(fp);
	printf("\n總共有%d本書!\n",n);
}

             /*以下為查詢部分*/

void seeknumber()
{
	FILE *fp;
	struct booksnumber;
	int i,flag=0;
	int num;
	char choice='y';
	fp=fopen("D:\\計035.txt","r");
		                        /*以讀的方式打開文件*/
    printf("\n請輸入你要查詢的書的書號:");
	scanf("%d",&num);
	fflush(stdin);              /*緩沖*/
    while(choice=='y'||choice=='Y')
	{
		for(i=0;fread(&books[i],sizeof(struct bookstype),1,fp)!=0;i++)
		{
		 if(num==books[i].number)
		 {
			printf("找到所要查的書來,具體資料如下:\n");
			printf("編號:%2d\n",books[i].number);
			printf("日期:%d，%d，%d\n",books[i].date.year,books[i].date.month,books[i].date.day);
            printf("書名:%s\n",books[i].name);
			printf("作者名:%s\n",books[i].writer);
			printf("類型:%s\n",books[i].form);
			printf("租借情況:%s<*0為已借走,1為未借*>\n",books[i].lend);
		    flag=1;
		 }
		}
		if(flag==0)
			printf("\n沒有發現書號為%d的書\n",num);
		
		printf("是否要繼續查找Y/N");
		scanf("%c",&choice);
	
	
	};
   
  	fclose(fp);
}
void seekdate()
{
	FILE *fp;
	struct booksdate;
	int i,flag=0;
	int year1,month1,day1;
	char choice='y';
	fp=fopen("D:\\計035.txt","r");
	printf("\n請輸入要查詢的書本的日期:");
	scanf("%d.%d.%d",&year1,&month1,&day1);
	fflush(stdin);
	do
	{

	    for(i=0;fread(&books[i],sizeof(struct bookstype),1,fp)!=0;i++)
		{

          if(year1==books[i].date.year&&month1==books[i].date.month&&books[i].date.day)
		 {
			printf("書本的編號是:%2d\n",books[i].number);
			printf("書本的日期是:%d.%d.%d\n",books[i].date.year,books[i].date.month,books[i].date.day);
			printf("書本的名字是:%s\n",books[i].name);
			printf("書本的作者是:%s\n",books[i].writer);
			printf("書本的類型是:%s\n",books[i].form);
			printf("書本是否借了:0為借1為未借%-3s:\n",books[i].lend);
			flag=1;
		  }
		}
		if(flag==0)
		     printf("\n沒有發現所要找的書!\n");
			
		printf("\n是否要繼續查找Y/N\n");
		scanf("%c",&choice);
	}while(choice=='y'||choice=='Y');
	fclose(fp);
}

void seekname()
{
	FILE *fp;
	struct booksname;
	int i,flag=0;
	char choice='y';
	char name[10];
	fp=fopen("D:\\計035.txt","r");
	printf("請輸入要查詢的書本的書名:");
	scanf("%s",name);
	fflush(stdin);
	do
	{
		for(i=0;fread(&books[i],sizeof(struct bookstype),1,fp)!=0;i++)
		{
		    if(strcmp(name,books[i].name)==0)
			{
		    	printf("找到要查找的書,具體資料如下:");
		    	printf("編號:%2d\n",books[i].number);
		    	printf("日期:%d.%d.%d\n",books[i].date.year,books[i].date.month,books[i].date.day);
			    printf("書名:%s\n",books[i].name);
		    	printf("作者名:%s\n",books[i].writer);
			    printf("類型:%s\n",books[i].form);
		    	printf("租借情況(0為已借出,1為未借出):%s\n",books[i].lend);
                fflush(stdin);
	    		flag=1;
			}
		}
        if(flag!=1)
		{
	    	printf("找不到書名為%s的書!",name);
		}
			
		printf("是否要繼續查找Y/N");
		scanf("%c",&choice);
	}while(choice=='y'||choice=='Y');
	fclose(fp);
}


void seekwriter()
{
	FILE *fp;
	struct bookswriter;
	int i,flag=0;
	char writer1[10];
	char choice='y';
	fp=fopen("D:\\計035.txt","r");
	printf("\n請輸入要查詢的書本的作者名:");
	scanf("%s",writer1);
	fflush(stdin);
	do
	{
    	for(i=0;fread(&books[i],sizeof(struct bookstype),1,fp)!=0;i++)
		{
    		if(strcmp(writer1,books[i].writer)==0)
			{
	    		printf("找到作者名為%s的書,具體資料如下:\n",writer1);
	    		printf("編號:%2d\n",books[i].number);
	    		printf("日期:%d.%d.%d\n",books[i].date.year,books[i].date.month,books[i].date.day);
                printf("書名:%s\n",books[i].name);
		        printf("作者名:%s\n",books[i].writer);
		     	printf("類型:%s\n",books[i].form);
		    	printf("租借情況(0為已借出,1為未借出):%s\n",books[i].lend);
                flag=1;
			}
		}
		if(flag!=1)
		{
	
			printf("\n找不到作者名為%s的書!\n",writer1);
		}	
		printf("是否要繼續查找Y/N:");
		scanf("%c",&choice);
	}while(choice=='y'||choice=='Y');
	fclose(fp);
}


void seekform()
{
	FILE *fp;
	struct bookform;
	int i,flag=0;
	char form1[4];