bac.cpp

用mfc写的图书馆信息管理系统界面

// Bac.cpp : implementation file
//

#include "stdafx.h"
#include "LibMgr.h"
#include "Bac.h"
#include "LibMgrDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

extern BLink BHead;
extern linkN;
extern RLink Head;
extern linkNo;
int shuru=0;
/////////////////////////////////////////////////////////////////////////////
// CBac dialog


CBac::CBac(CWnd* pParent /*=NULL*/)
	: CDialog(CBac::IDD, pParent)
{
	//{{AFX_DATA_INIT(CBac)
	m_bbnum = _T("");
	m_brnum = _T("");
	m_ceshu = 0;
	//}}AFX_DATA_INIT
}


void CBac::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CBac)
	DDX_Text(pDX, IDC_BACKBNUM, m_bbnum);
	DDX_Text(pDX, IDC_BACKRNUM, m_brnum);
	DDX_Text(pDX, IDC_CEEDIT, m_ceshu);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CBac, CDialog)
	//{{AFX_MSG_MAP(CBac)
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBac message handlers

void CBac::OnButton1() //输入读者借书证号
{
	// TODO: Add your control notification handler code here
	CString num;
	CString temp;
	
	UpdateData(TRUE);
	num=m_brnum;
	RLink p;
	p=reader.Find(Head,num);
	if(num=="") MessageBox("请输入借书证号!");
	else if(p==NULL) MessageBox("此借书证号不存在!");
	else
	{
		m_ceshu=p->sum;
		UpdateData(FALSE);
		shuru=1;
	}
}



void CBac::OnButton2() //还书
{
	// TODO: Add your control notification handler code here
	CString bnum,rnum;
	UpdateData(TRUE);
	bnum=m_bbnum;
	rnum=m_brnum;
	if(shuru==0) MessageBox("借书证号有误!");
	else if(bnum=="") MessageBox("请输入图书编号!");
	else
	{
		BLink p1;
		RLink p2;
		p1=book.Find(BHead,bnum);
		p2=reader.Find(Head,rnum);
		if(p1!=NULL&&p2!=NULL)
		{
			if(p1->RNum==rnum)
			{
				p1->onshelf=0;
				
				p2->sum--;
				p1->RNum="";
				m_ceshu=p2->sum;
				UpdateData(FALSE);
				MessageBox("还书成功!");
				SetDlgItemText(IDC_BACKBNUM,"");
				//SetDlgItemText(IDC_BACKRNUM,"");
			}
			else MessageBox("还书失败!");
		}
		else MessageBox("读者信息有误或所借图书不存在!");
	}

}