运行后执行计算只显示无法识别的运算符或错误输入怎么解决？
// 计算器Dlg.cpp : implementation file
//
#include "stdafx.h"
#include "计算器.h"
#include "计算器Dlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
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 dialog
CMyDlg::CMyDlg(CWnd* pParent /*=NULL*/)
: CDialog(CMyDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CMyDlg)
m_strResult = _T("");
//}}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_EDIT1, m_strResult);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CMyDlg, CDialog)
//{{AFX_MSG_MAP(CMyDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
ON_BN_CLICKED(IDC_BUTTON7, OnButton7)
ON_BN_CLICKED(IDC_BUTTON8, OnButton8)
ON_BN_CLICKED(IDC_BUTTON9, OnButton9)
ON_BN_CLICKED(IDC_BUTTON10, OnButton10)
ON_BN_CLICKED(IDC_BUTTON4, OnButton4)
ON_BN_CLICKED(IDC_BUTTON5, OnButton5)
ON_BN_CLICKED(IDC_BUTTON6, OnButton6)
ON_BN_CLICKED(IDC_BUTTON3, OnButton3)
ON_BN_CLICKED(IDC_BUTTON14, OnButton14)
ON_BN_CLICKED(IDC_BUTTON12, OnButton12)
ON_BN_CLICKED(IDC_BUTTON15, OnButton15)
ON_BN_CLICKED(IDC_BUTTON11, OnButton11)
ON_BN_CLICKED(IDC_BUTTON17, OnButton17)
ON_BN_CLICKED(IDC_BUTTON16, OnButton16)
ON_BN_CLICKED(IDC_BUTTON13, OnButton13)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CMyDlg message handlers
BOOL CMyDlg::OnInitDialog()
{
CDialog::OnInitDialog();
// 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
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::OnButton1()
{
// TODO: Add your control notification handler code here
m_strResult += "7";
UpdateData(FALSE);
}
void CMyDlg::OnButton2()
{
// TODO: Add your control notification handler code here
m_strResult += "8";
UpdateData(FALSE);
}
void CMyDlg::OnButton7()
{
// TODO: Add your control notification handler code here
m_strResult += "1";
UpdateData(FALSE);
}
void CMyDlg::OnButton8()
{
// TODO: Add your control notification handler code here
m_strResult += "2";
UpdateData(FALSE);
}
void CMyDlg::OnButton9()
{
// TODO: Add your control notification handler code here
m_strResult += "3";
UpdateData(FALSE);
}
void CMyDlg::OnButton10()
{
// TODO: Add your control notification handler code here
m_strResult += "0";
UpdateData(FALSE);
}
void CMyDlg::OnButton4()
{
// TODO: Add your control notification handler code here
m_strResult += "4";
UpdateData(FALSE);
}
void CMyDlg::OnButton5()
{
// TODO: Add your control notification handler code here
m_strResult += "5";
UpdateData(FALSE);
}
void CMyDlg::OnButton6()
{
// TODO: Add your control notification handler code here
m_strResult += "6";
UpdateData(FALSE);
}
void CMyDlg::OnButton3()
{
// TODO: Add your control notification handler code here
m_strResult += "9";
UpdateData(FALSE);
}
void CMyDlg::OnButton14()
{
// TODO: Add your control notification handler code here
TRACE(_T("Flag_str: %s\n"), Flag_str);
// 输出 m_strOper1 和 m_strOper2 的值以便调试
TRACE(_T("m_strOper1: %s\n"), m_strOper1);
TRACE(_T("m_strOper2: %s\n"), m_strOper2);
double NResult = 0;
double NstrOper1 = atof((LPCTSTR)m_strOper1); // 不需要 GetString()
double NstrOper2 = atof((LPCTSTR)m_strOper2);
// 额外的调试输出，检查转换后的值
TRACE(_T("NstrOper1: %lf\n"), NstrOper1);
TRACE(_T("NstrOper2: %lf\n"), NstrOper2); // 假设 m_strOper1 和 m_strOper2 是 CString 对象
// 假设 Flag_str 是一个 CString 对象，包含 "+"、"-"、"*" 或 "/" 中的一个
if (Flag_str.Compare(_T("+")) == 0) {
NResult = NstrOper1 + NstrOper2;
m_strResult.Format(_T("%lf"), NResult);
} else if (Flag_str.Compare(_T("-")) == 0) {
NResult = NstrOper1 - NstrOper2;
m_strResult.Format(_T("%lf"), NResult);
} else if (Flag_str.Compare(_T("*")) == 0) {
NResult = NstrOper1 * NstrOper2;
m_strResult.Format(_T("%lf"), NResult);
} else if (Flag_str.Compare(_T("/")) == 0) {
if (NstrOper2 == 0) {
m_strResult = _T("除数不能为0");
} else {
NResult = NstrOper1 / NstrOper2;
m_strResult.Format(_T("%lf"), NResult);
}
} else {
TRACE(_T("无法识别的运算符或错误输入!\n"));
MessageBox(_T("无法识别的运算符或错误输入!"));
// 你也可以在这里输出 m_strOper1 和 m_strOper2 的值以便调试
}
UpdateData(FALSE); // 假设这是 MFC 中的一个函数，用于更新控件的值
}
void CMyDlg::OnButton12()
{
// TODO: Add your control notification handler code here
m_strOper1 = m_strResult;
m_strResult = "";
Flag_str = 1;
UpdateData(FALSE);
}
void CMyDlg::OnButton15()
{
// TODO: Add your control notification handler code here
m_strOper1 = "";
m_strOper2 = "";
m_strResult = "";
UpdateData(FALSE);
}
void CMyDlg::OnButton11()
{
// TODO: Add your control notification handler code here
m_strResult += ".";
UpdateData(FALSE);
}
void CMyDlg::OnButton17()
{
// TODO: Add your control notification handler code here
m_strOper1 = m_strResult;
m_strResult = "";
Flag_str = 2;
UpdateData(FALSE);
}
void CMyDlg::OnButton16()
{
// TODO: Add your control notification handler code here
m_strOper1 = m_strResult;
m_strResult = "";
Flag_str = 3;
UpdateData(FALSE);
}
void CMyDlg::OnButton13()
{
// TODO: Add your control notification handler code here
m_strOper1 = m_strResult;
m_strResult = "";
Flag_str = 4;
UpdateData(FALSE);
}
