dbmanage.cpp

纯C语言的图书管理系统

#include "stdafx.h"		//包含工程头文件，必须加
#include "DBManage.h"	//把DBManage.h中的函数的声明等包含进来
#include <stdlib.h>		//调用malloc函数所需的头文件

void writefile(BookRecType **head)
{
	//需在此处添加把链表数据写进book.dat的具体实现代码
	//book.dat存储在 ./DB/book.dat
	FILE *fp;
	BookRecType * CurrP/*指向当前节点的指针*/;
	fp = fopen("book.dat","wb");
	
	for (CurrP = *head ; CurrP!=NULL; CurrP = CurrP->next)
	{
		fwrite(CurrP,sizeof(BookRecType),1,fp);
	}
	fclose(fp);
}
void readfile(BookRecType **head)
{
	//需在此处添加把book.dat的数据读入链表的具体实现代码
	//book.dat存储在 ./DB/book.dat
	FILE *fp;
	BookRecType * newnode;
	fp = fopen("book.dat","rb");
	*head = NULL;
	
	while(!feof(fp))
	{
		newnode =  (BookRecType *) malloc(sizeof(BookRecType));
		newnode->bno[0]='\0';
		fread(newnode,sizeof(BookRecType),1,fp);
		if (newnode->bno[0]!='\0' ){
			newnode ->next = *head;
			*head = newnode;
		}
		
	}
	fclose(fp);

	/*BookRecType * CurrP=0;
	for (CurrP = *head ; CurrP!=NULL; CurrP = CurrP->next)
	{
		printf("%4s%20s%8s%20s%8d%8d\n",CurrP->bno,CurrP->bname,CurrP->author,CurrP->press,CurrP->storenum,CurrP->borrownum);
	}*/
}

void readReaderInfo(ReaderInfo ** head)
{
	//需在此处添加把reader.dat的数据读入链表的具体实现代码
	FILE *fp;
	ReaderInfo * newnode;
	fp = fopen("reader.dat","rb");
	*head = NULL;
	
	while(!feof(fp))
	{
		newnode =  (ReaderInfo *) malloc(sizeof(ReaderInfo));
		newnode->rno[0]='\0';
		fread(newnode,sizeof(ReaderInfo),1,fp);
		if (newnode->rno[0]!='\0' ){
			newnode ->next = *head;
			*head = newnode;
		}
		
	}
	fclose(fp);
}
void writeReaderInfo(ReaderInfo ** head)
{
	//需在此处添加把链表数据写进reader.dat的具体实现代码
	FILE *fp;
	ReaderInfo * CurrP/*指向当前节点的指针*/;
	fp = fopen("reader.dat","wb");
	
	for (CurrP = *head ; CurrP!=NULL; CurrP = CurrP->next)
	{
		fwrite(CurrP,sizeof(ReaderInfo),1,fp);
	}
	fclose(fp);
}