我在myproject.cpp中定义了一个结构如下:
typedef SEND
{
int senddata[40];
}pres;
然后定义了一个全局变量。
pres mysend;
在myprojectDlg.cpp中我要引用这个全局变量。
于是我先声明了一下:
extern pres mysend;
编译时出错:
说在"extern pres mysend;"这一行前面少个";"
我看了一下并有少,真不知为什么,请大家帮帮忙,多谢了。
typedef SEND
{
int senddata[40];
}pres;
然后定义了一个全局变量。
pres mysend;
在myprojectDlg.cpp中我要引用这个全局变量。
于是我先声明了一下:
extern pres mysend;
编译时出错:
说在"extern pres mysend;"这一行前面少个";"
我看了一下并有少,真不知为什么,请大家帮帮忙,多谢了。
{
int senddata[40];
}pres;
{
int senddata[40];
}; pres
typedef SEND
{
int senddata[40];
}; pres ;
我是这样的:
typedef struct SEND
{
int senddata[40];
}pres;
{
int senddata[40];
}pres;
将这个结构定义到stdafx.h中,
在myprojectDlg.cpp中没有pres的定义
??
{
int senddata[40];
}pres; 结构我就不多说了,不知道typedef SEND怎么能通过编译。
然后全局的话在stdafx.cpp中定义
pres mysend;在stdafx.h中导出
extern pres mysend;
extern pres mysend;
呀
结构一般写程序我喜欢通用结构专门用个.h来定义,在需要用到的地方Include.
{
int senddata[40];
}pres;
放在myproject.h里面,
因为你在myprojectDlg.cpp里面
extern pres mysend;的时候,类型pres已经跑出了作用域,
所以,再myprojectDlg.cpp里面编译器无法识别类型pres,
所以,才发生了这个错误。
// 科浩窑炉Dlg.cpp : implementation file
//#include "stdafx.h"
#include "科浩窑炉.h"
#include "科浩窑炉Dlg.h"
#include "DataDownLoad.h"
#include "HisLine.h"
#include <afxdao.h>#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
CDaoDatabase m_dbColect;//只要加上下面的两个声明,就提示此处少个";"
extern CSerialCom port;
extern Pres SendData;class CAboutDlg : public CDialog
{
public:
CAboutDlg();// Dialog Data
//{{AFX_DATA(CAboutDlg)
enum { IDD = IDD_ABOUTBOX };
//}}AFX_DATA // ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CAboutDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL// Implementation
protected:
//{{AFX_MSG(CAboutDlg)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
//{{AFX_DATA_INIT(CAboutDlg)
//}}AFX_DATA_INIT
}void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CAboutDlg)
//}}AFX_DATA_MAP
}BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
//{{AFX_MSG_MAP(CAboutDlg)
// No message handlers
//}}AFX_MSG_MAP
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// CMyDlg dialogCMyDlg::CMyDlg(CWnd* pParent /*=NULL*/)
: CDialog(CMyDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CMyDlg)
m_coldata1 = 0;
m_coldata2 = 0;
m_coldata3 = 0;
m_coldata4 = 0;
m_coldata5 = 0;
m_coldata6 = 0;
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}void CMyDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CMyDlg)
DDX_Text(pDX, IDC_DATA1, m_coldata1);
DDX_Text(pDX, IDC_DATA2, m_coldata2);
DDX_Text(pDX, IDC_DATA3, m_coldata3);
DDX_Text(pDX, IDC_DATA4, m_coldata4);
DDX_Text(pDX, IDC_DATA5, m_coldata5);
DDX_Text(pDX, IDC_DATA6, m_coldata6);
//}}AFX_DATA_MAP
}BEGIN_MESSAGE_MAP(CMyDlg, CDialog)
//{{AFX_MSG_MAP(CMyDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(ID_MYCANCEL, OnMycancel)
ON_BN_CLICKED(IDC_STARTCOLECT, OnStartcolect)
ON_COMMAND(ID_MENUITEMDOWN, OnMenuitemdown)
ON_COMMAND(ID_MENULINE, OnMenuline)
ON_COMMAND(ID_MENUITEMKH, OnMenuitemkh)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// CMyDlg message handlers
BOOL CMyDlg::OnInitDialog()
{
CDialog::OnInitDialog();
m_coldata1=0;
m_coldata2=0;
m_coldata3=0;
// Add "About..." menu item to system menu.
// IDM_ABOUTBOX must be in the system command range.
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000); CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
CString strAboutMenu;
strAboutMenu.LoadString(IDS_ABOUTBOX);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
} // Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon
// TODO: Add extra initialization here
SetWindowPos(NULL,0,0,GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN),0);
if(!(port.OpenPort("COM1")))
{
MessageBox("对不起\n串行口连接或设置不正确!");
}
else//
{
if(!port.ConfigurePort(9600,8,FALSE,NOPARITY,TWOSTOPBITS))
{
MessageBox("对不起\n串行口设置不正确!");
}
else//
{
if(!port.SetCommunicationTimeouts(1000,10,10,10,10))
{
MessageBox("对不起\n通讯超时了!");
port.ClosePort();
}
else//初始化配方数据
{
int i;
for(i=0;i<40;i++)
{
SendData.SendData[i]=0;
}
//打开后台数据库
try
{
m_dbColect.Open("C:\\My Documents\\back.mdb");
}
catch(CDaoException *exc)
{
//DisplayDaoException(exc);
exc->Delete();
}
if(m_dbColect.IsOpen())
{
TRACE("数据库已经打开了!");
CDaoTableDef m_table(&m_dbColect);
try{
m_table.Open("CONTROL");
}
catch(CDaoException *exc)
{
//DisplayDaoException(exc);
exc->Delete();
} }
else
{
TRACE("数据库还没有打开了!");
}
}//初始化配方数据
}// }//
return TRUE; // return TRUE unless you set the focus to a control
}void CMyDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.void CMyDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); // Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2; // Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialog::OnPaint();
}
}// The system calls this to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CMyDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}void CMyDlg::OnMycancel()
{
// TODO: Add your control notification handler code here
AfxBeginThread(ColDaProc,GetSafeHwnd(),THREAD_PRIORITY_NORMAL);
}
void CMyDlg::OnStartcolect()
{
// TODO: Add your control notification handler code here
AfxBeginThread(ColDaProc,GetSafeHwnd(),THREAD_PRIORITY_NORMAL);
}void CMyDlg::OnMenuitemdown()
{
// TODO: Add your command handler code here
CDataDownLoad datadown;
datadown.DoModal();
}void CMyDlg::OnMenuline()
{
// TODO: Add your command handler code here
CHisLine hisline;
hisline.DoModal();
}void CMyDlg::OnMenuitemkh()
{
// TODO: Add your command handler code here
CAboutDlg helpdlg;
helpdlg.DoModal();
}
#include "myproject.cpp"
编译器自然不认识pres结构体,
建议:将结构体定义放入myproject.h文件