labrarysysterm.cpp

本程序是C++语言编写的

#include "stdio.h"
#include "stdlib.h"
#include "conio.h"
#include "string.h"
#define   SIZE 10000
FILE *fp;
struct Data
{
	int year;
	int month;
	int day;
};                          /*定义日期的结构体*/
struct bookstype 
{
	int    number;          /*书的编号,从1开始编号*/
	struct Data date;       /*书的出版日期*/
	char   name[20];        /*书名*/
	char   writer[8];       /*作者名*/
    char   form[4];         /*书的类型,一般用大写的英文字母(A-Z)表示*/
	char   lend[5];         /*租借情况1有库存0无库存*/
}books[SIZE];
/*struct   reader
{     
	char   name[10];
	char   banji[20];
	int    old;
	int    nub;             /*借阅统计*/     
/*}student[SIZE_stu];*/
char path();                /*进入系统的路径设置函数*/
void input();               /*     输入书籍      */
int  save();                /*     保存书籍      */
void output();              /*     输出书籍      */
void seeknumber();          /*     按书号查询    */
void seekdate();            /*     按日期查询    */
void seekname();            /*     按书名查询    */
void seekwriter();          /*     按作者名查询  */
void seekform();            /*     按书的类型查询 */
void ordernumber();         /*     按书的编号排序 */
void orderdate();           /*     按书的日期排序 */
void orderform();           /*     按书的类型排序 */
void delenumber();          /*     按书号删除书籍 */
void delename();            /*     按书名删除书籍 */ 
/*int   book_borrowed();    /*     书籍借出       */
/*void  returnbooks();      /*     还书函数       */  
char path()
{
	char s[100];
	char password[]="1"; 
	                       /*字符数组password存放正确的口令1*/
    int flag=0,n=3;
	                       /*设置口令对错标志flag,初值为0,n为允许输入错误次数*/
    char choice='y';

	do
	{
		printf("请输入口令:");
		gets(s);
		if(!(strcmp(s,password)))
		{
			printf("\n             欢迎使用该系统!             \n");
			flag=1;  
			break;
		}
		else 
			if(n>0)
			{
				printf("输入错误,请再输一次!\n");
				n--;
			}
	}while(n>0);

	if(!flag)
	{
		printf("对不起,你不能使用该系统,再见!\n");
		exit(0);
	}
	return 1;
}
void input()
{
	FILE *fp;
    struct bookstype books[SIZE];
    int i=1;
	char choice='y';
	if((fp=fopen("D:\\计035.txt","a+"))!=NULL)
	{                                                 /*以读或追加写的方式打开文件*/
       while(choice=='y'||choice=='Y')
	   {
		printf("————请输入第%d本书的书号,日期,书名,作者,类别以及租借情况:————\n",i);
        printf("++++++++             请输入第%d本书的书号:                   ++++++++\n",i);
		scanf("%d",&books[i].number);
		printf("————             请输入第%d本书的日期:                   ++++++++\n",i);
        scanf("%d.%d.%d",&books[i].date.year,&books[i].date.month,&books[i].date.day);
		printf("请输入书名：");
		scanf("%s",books[i].name);
		printf("请输入书的作者:");
		scanf("%s",books[i].writer);
		printf("请输入书的类别:");
		scanf("%s",books[i].form);
		printf("书的库存状态:");
		scanf("%s",books[i].lend);
		fwrite(&books[i],sizeof(struct bookstype),1,fp);            /*将books[i]追加入磁盘文件*/
	                                              
        printf("是否要输入下一本书Y/N\n");
		scanf("%s",&choice);
	   	i++; 
	   }
	}
	fclose(fp);   
}

int  save()                                             /*将修改过的文件结果写到文件里*/
{
	FILE *fp;
	int i ;
	if ((fp=fopen("D:\\计035.txt","w"))==NULL)
	{
		printf("\n 不能打开输出文件");
     	return 0;
	}
	for (i=0;i<SIZE;i++)

		if (fwrite(&books[SIZE],sizeof(struct bookstype),1,fp)!=1)
		{
			printf("\n写文件时出错");
			return 0;
		}
   fclose(fp);
   return 1;
}

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

	{
		printf("打开文件出错!\n");
		return;
	}
	else
		if(fread(&books[0],sizeof(struct bookstype),1,fp)==0)
		{
			printf("库存已空!\n");
			return;
		}
    	else
	{
        printf("显示所有书籍:\n");
    	printf("编号        日期        书名        作者名       类型      状态\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("%d\n",books[i].lend);			
			n++;                                                                /*统计书籍*/
		}
       printf("********************************************************************\n");
	}
	fclose(fp);
	printf("\n总共有%d本书!\n",n);
}

                                    /*以下为查询部分*/
void seeknumber()
{
	FILE *fp;
	struct booksnumber;
	int i,flag=0;
	int num;
	char choice='y';
	fp=fopen("D:\\计035.txt","r");
		                        /*以读的方式打开文件*/
    printf("\n请输入你要查询的书的书号:");
	scanf("%d",&num);
	fflush(stdin);              /*缓冲*/
    while(choice=='y'||choice=='Y')
	{
		for(i=0;fread(&books[i],sizeof(struct bookstype),1,fp)!=0;i++)
		{
		 if(num==books[i].number)
		 {
			printf("找到所要查的书来,具体资料如下:\n");
			printf("编号:%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("书名:%s\n",books[i].name);
			printf("作者名:%s\n",books[i].writer);
			printf("类型:%s\n",books[i].form);
			printf("租借情况:%d<*0为已借走,1为未借*>\n",books[i].lend);
		    flag=1;
		 }
		}
		if(flag==0)
			printf("\n没有发现书号为%d的书\n",num);
		
		printf("是否要继续查找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:\\计035.txt","r");
	printf("\n请输入要查询的书本的日期:");
	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("书本的编号是:%2d\n",books[i].number);
			printf("书本的日期是:%d.%d.%d\n",books[i].date.year,books[i].date.month,books[i].date.day);
			printf("书本的名字是:%s\n",books[i].name);
			printf("书本的作者是:%s\n",books[i].writer);
			printf("书本的类型是:%s\n",books[i].form);
			printf("书本是否借了:0为借1为未借%-3s:\n",books[i].lend);
			flag=1;
		  }
		}
		if(flag==0)
		     printf("\n没有发现所要找的书!\n");
			
		printf("\n是否要继续查找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:\\计035.txt","r");
	printf("请输入要查询的书本的书名:");
	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("找到要查找的书,具体资料如下:");
		    	printf("编号:%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("书名:%s\n",books[i].name);
		    	printf("作者名:%s\n",books[i].writer);
			    printf("类型:%s\n",books[i].form);
		    	printf("租借情况(0为已借出,1为未借出):%d\n",books[i].lend);
                fflush(stdin);
	    		flag=1;
			}
		}
        if(flag!=1)
		{
	    	printf("找不到书名为%s的书!",name);
		}
			
		printf("是否要继续查找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:\\计035.txt","r");
	printf("\n请输入要查询的书本的作者名:");
	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("找到作者名为%s的书,具体资料如下:\n",writer1);
	    		printf("编号:%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("书名:%s\n",books[i].name);
		        printf("作者名:%s\n",books[i].writer);
		     	printf("类型:%s\n",books[i].form);
		    	printf("租借情况(0为已借出,1为未借出):%s\n",books[i].lend);
                flag=1;
			}
		}
		if(flag!=1)
		{
	
			printf("\n找不到作者名为%s的书!\n",writer1);
		}	
		printf("是否要继续查找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];
	char choice='y';
	fp=fopen("D:\\计035.txt","r");
	printf("\n请输入书本的种类:");
	scanf("%s",form1);
	fflush(stdin);
	do
	{
		for(i=0;fread(&books[i],sizeof(struct bookstype),1,fp)!=0;i++)
		{
	    	if(form1==books[i].form)
			{
	    		printf("\n找到要查询的书,具体资料如下:\n");
	    		printf("编号:%2d\n",books[i].number);
	     		printf("日期:%d.%d.%d",books[i].date.year,books[i].date.month,books[i].date.day);
	    		printf("书名:%s\n",books[i].name);
	     		printf("作者名:%s\n",books[i].writer);
	    		printf("类型:%s\n",books[i].form);
		    	printf("租借情况:%s\n",books[i].lend);
		    	flag=1;