小工具 – 浮点计算器

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小工具 – 浮点计算器

概述

float CFloatCalcDlg::uint32_to_float(uint32_t u) { 
    return (*(float*)&u); } 

笔记

编程环境 : vs2019 mfc dlg

FloatCalcDlg.cpp

 // FloatCalcDlg.cpp: 实现文件 // #include "pch.h" #include "framework.h" #include "FloatCalc.h" #include "FloatCalcDlg.h" #include "afxdialogex.h" #ifdef _DEBUG #define new DEBUG_NEW #endif // 用于应用程序“关于”菜单项的 CAboutDlg 对话框 class CAboutDlg : public CDialogEx { 
    public: CAboutDlg(); // 对话框数据 #ifdef AFX_DESIGN_TIME enum { 
    IDD = IDD_ABOUTBOX }; #endif protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持 // 实现 protected: DECLARE_MESSAGE_MAP() }; CAboutDlg::CAboutDlg() : CDialogEx(IDD_ABOUTBOX) { 
    } void CAboutDlg::DoDataExchange(CDataExchange* pDX) { 
    CDialogEx::DoDataExchange(pDX); } BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx) END_MESSAGE_MAP() // CFloatCalcDlg 对话框 CFloatCalcDlg::CFloatCalcDlg(CWnd* pParent /*=nullptr*/) : CDialogEx(IDD_FLOATCALC_DIALOG, pParent) , m_cs4ByteIn(_T("")) , m_cs4ByteOut(_T("")) , m_csFloatIn(_T("")) , m_csFloatOut(_T("")) { 
    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); } void CFloatCalcDlg::DoDataExchange(CDataExchange* pDX) { 
    CDialogEx::DoDataExchange(pDX); DDX_Control(pDX, IDC_EDIT_TIP, m_ctrlTip); DDX_Text(pDX, IDC_EDIT_4BYTES_IN, m_cs4ByteIn); DDX_Text(pDX, IDC_EDIT_4BYTES_OUT, m_cs4ByteOut); DDX_Text(pDX, IDC_EDIT_FLOAT_IN, m_csFloatIn); DDX_Text(pDX, IDC_EDIT_FLOAT_OUT, m_csFloatOut); } BEGIN_MESSAGE_MAP(CFloatCalcDlg, CDialogEx) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDOK, &CFloatCalcDlg::OnBnClickedOk) ON_BN_CLICKED(IDCANCEL, &CFloatCalcDlg::OnBnClickedCancel) ON_WM_CLOSE() ON_BN_CLICKED(IDC_BUTTON_FLOAT_TO_4BYTES, &CFloatCalcDlg::OnBnClickedButtonFloatTo4bytes) ON_BN_CLICKED(IDC_BUTTON_4BYTES_TO_FLOAT, &CFloatCalcDlg::OnBnClickedButton4bytesToFloat) END_MESSAGE_MAP() // CFloatCalcDlg 消息处理程序 BOOL CFloatCalcDlg::OnInitDialog() { 
    CDialogEx::OnInitDialog(); // 将“关于...”菜单项添加到系统菜单中。 // IDM_ABOUTBOX 必须在系统命令范围内。 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); ASSERT(IDM_ABOUTBOX < 0xF000); CMenu* pSysMenu = GetSystemMenu(FALSE); if (pSysMenu != nullptr) { 
    BOOL bNameValid; CString strAboutMenu; bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX); ASSERT(bNameValid); if (!strAboutMenu.IsEmpty()) { 
    pSysMenu->AppendMenu(MF_SEPARATOR); pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); } } // 设置此对话框的图标。 当应用程序主窗口不是对话框时，框架将自动 // 执行此操作 SetIcon(m_hIcon, TRUE); // 设置大图标 SetIcon(m_hIcon, FALSE); // 设置小图标 // TODO: 在此添加额外的初始化代码 this->SetWindowTextW(TEXT("浮点计算器")); addMsg(TEXT("功能:\r\n")); addMsg(TEXT("1. 输入浮点数, 转换成4字节\r\n")); addMsg(TEXT("2. 输入4字节, 转换成浮点数\r\n")); // for test this->m_csFloatIn = TEXT("121"); this->m_cs4ByteIn = TEXT("0x42F20000"); this->UpdateData(FALSE); return TRUE; // 除非将焦点设置到控件，否则返回 TRUE } void CFloatCalcDlg::OnSysCommand(UINT nID, LPARAM lParam) { 
    if ((nID & 0xFFF0) == IDM_ABOUTBOX) { 
    CAboutDlg dlgAbout; dlgAbout.DoModal(); } else { 
    CDialogEx::OnSysCommand(nID, lParam); } } // 如果向对话框添加最小化按钮，则需要下面的代码 // 来绘制该图标。 对于使用文档/视图模型的 MFC 应用程序， // 这将由框架自动完成。 void CFloatCalcDlg::OnPaint() { 
    if (IsIconic()) { 
    CPaintDC dc(this); // 用于绘制的设备上下文 SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0); // 使图标在工作区矩形中居中 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; // 绘制图标 dc.DrawIcon(x, y, m_hIcon); } else { 
    CDialogEx::OnPaint(); } } //当用户拖动最小化窗口时系统调用此函数取得光标 //显示。 HCURSOR CFloatCalcDlg::OnQueryDragIcon() { 
    return static_cast<HCURSOR>(m_hIcon); } void CFloatCalcDlg::OnBnClickedOk() { 
    CWnd* pWnd = GetFocus(); if (GetDlgItem(IDOK) == pWnd) { 
    // 取消默认的回车处理 CDialogEx::OnOK(); return; } } void CFloatCalcDlg::OnBnClickedCancel() { 
    CWnd* pWnd = GetFocus(); if (GetDlgItem(IDCANCEL) == pWnd) { 
    // 取消摩恩的ESC键处理 CDialogEx::OnCancel(); return; } } void CFloatCalcDlg::OnClose() { 
    // TODO: 在此添加消息处理程序代码和/或调用默认值 CDialog::OnOK(); CDialogEx::OnClose(); } void CFloatCalcDlg::addMsg(const TCHAR* pcMsg) { 
    do { 
    if (NULL == pcMsg) { 
    break; } if (_tcslen(pcMsg) > 0) { 
    m_ctrlTip.SetSel(-1, -1, TRUE); m_ctrlTip.ReplaceSel(pcMsg); } else { 
    // 如果给的文本为空字符串, 就说明要清空消息 m_ctrlTip.SetSel(0, -1, TRUE); m_ctrlTip.ReplaceSel(TEXT("")); } // 加一个回车 m_ctrlTip.SetSel(-1, -1, TRUE); m_ctrlTip.ReplaceSel(TEXT("\r\n")); } while (false); } void CFloatCalcDlg::OnBnClickedButtonFloatTo4bytes() { 
    byte ary[4]; CString cs; CString csTmp; this->UpdateData(TRUE); addMsg(TEXT("")); addMsg(TEXT("浮点数转4字节")); float f = (float)_ttof(m_csFloatIn); uint32_t u = *(uint32_t*)&f; uint32_to_4byte(u, ary, 4); cs.Format(TEXT("0x%.2X%.2X%.2X%.2X"), ary[0], ary[1], ary[2], ary[3]); this->m_cs4ByteOut = cs; csTmp.Format(TEXT("%.2f to %s\r\n"), f, cs); addMsg(csTmp); this->UpdateData(FALSE); } void CFloatCalcDlg::uint32_to_4byte(uint32_t u, byte* ary, int aryLen) { 
    _ASSERT(NULL != ary); _ASSERT(aryLen >= 4); ary[0] = (byte)((u >> (8 * 3)) & 0xff); ary[1] = (byte)((u >> (8 * 2)) & 0xff); ary[2] = (byte)((u >> (8 * 1)) & 0xff); ary[3] = (byte)((u >> (8 * 0)) & 0xff); } void CFloatCalcDlg::OnBnClickedButton4bytesToFloat() { 
    CString cs; CString csTmp; uint32_t u; this->UpdateData(TRUE); addMsg(TEXT("")); addMsg(TEXT("4字节转浮点数")); cs = this->m_cs4ByteIn; cs.MakeUpper(); if (cs.GetLength() >= 2) { 
    if ((TEXT('0') == cs[0]) && ((TEXT('X') == cs[1]))) { 
    cs = cs.Right(cs.GetLength() - 2); } } do { 
    //  if (cs.GetLength() > 8) { 
    addMsg(TEXT("err : 4字节最多8个16进制字符")); break; } if (!IsHexPsz((LPCTSTR)cs)) { 
    addMsg(TEXT("err : 请输入16进制字符串")); break; } while (cs.GetLength() < 8) { 
    cs = _T("0") + cs; } Hex8CharToUint32((LPCTSTR)cs, u); this->m_csFloatOut.Format(TEXT("%.2f"), uint32_to_float(u)); csTmp.Format(TEXT("%s to %s\r\n"), m_cs4ByteIn, this->m_csFloatOut); addMsg(csTmp); } while (false); this->UpdateData(FALSE); } float CFloatCalcDlg::uint32_to_float(uint32_t u) { 
    return (*(float*)&u); } void CFloatCalcDlg::Hex8CharToUint32(const TCHAR* pszHex8, uint32_t& u) { 
    unsigned char uc1; unsigned char uc2; _ASSERT(NULL != pszHex8); _ASSERT(8 == _tcslen(pszHex8)); _ASSERT(NULL != pszHex8); _ASSERT(8 == _tcslen(pszHex8)); uc1 = OneHexChar2UChar(pszHex8[0]); uc2 = OneHexChar2UChar(pszHex8[1]); u = uc1; u <<= 4; u += uc2; u <<= 4; uc1 = OneHexChar2UChar(pszHex8[2]); uc2 = OneHexChar2UChar(pszHex8[3]); u += uc1; u <<= 4; u += uc2; u <<= 4; uc1 = OneHexChar2UChar(pszHex8[4]); uc2 = OneHexChar2UChar(pszHex8[5]); u += uc1; u <<= 4; u += uc2; u <<= 4; uc1 = OneHexChar2UChar(pszHex8[6]); uc2 = OneHexChar2UChar(pszHex8[7]); u += uc1; u <<= 4; u += uc2; } unsigned char CFloatCalcDlg::OneHexChar2UChar(TCHAR c) { 
    unsigned char uc = 0; _ASSERT(((c >= TEXT('0')) && (c <= TEXT('9'))) || ((c >= TEXT('A')) && (c <= TEXT('F')))); if ((c >= TEXT('0')) && (c <= TEXT('9'))) { 
    uc = (unsigned char)(c - TEXT('0')); } else if ((c >= TEXT('A')) && (c <= TEXT('F'))) { 
    uc = (unsigned char)(c - TEXT('A') + 10); } return uc; } bool CFloatCalcDlg::IsHexPsz(const TCHAR* psz) { 
    int i = 0; TCHAR c = 0; bool b_ok = true; _ASSERT(NULL != psz); for (i = 0; i < (int)_tcslen(psz); i++) { 
    c = psz[i]; if (((c >= TEXT('0')) && (c <= TEXT('9'))) || (c >= TEXT('A')) && (c <= TEXT('F'))) { 
    } else { 
    b_ok = false; break; } } return b_ok; } 

FloatCalcDlg.h

 // FloatCalcDlg.h: 头文件 // #pragma once // CFloatCalcDlg 对话框 class CFloatCalcDlg : public CDialogEx { 
    // 构造 public: CFloatCalcDlg(CWnd* pParent = nullptr); // 标准构造函数 // 对话框数据 #ifdef AFX_DESIGN_TIME enum { 
    IDD = IDD_FLOATCALC_DIALOG }; #endif protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持 // 实现 protected: HICON m_hIcon; // 生成的消息映射函数 virtual BOOL OnInitDialog(); afx_msg void OnSysCommand(UINT nID, LPARAM lParam); afx_msg void OnPaint(); afx_msg HCURSOR OnQueryDragIcon(); DECLARE_MESSAGE_MAP() public: afx_msg void OnBnClickedOk(); afx_msg void OnBnClickedCancel(); afx_msg void OnClose(); private: void addMsg(const TCHAR* pcMsg); void uint32_to_4byte(uint32_t u, byte* ary, int aryLen); void Hex8CharToUint32(const TCHAR* pszHex8, uint32_t& u); bool IsHexPsz(const TCHAR* psz); unsigned char OneHexChar2UChar(TCHAR c); float uint32_to_float(uint32_t u); public: CEdit m_ctrlTip; afx_msg void OnBnClickedButtonFloatTo4bytes(); afx_msg void OnBnClickedButton4bytesToFloat(); CString m_cs4ByteIn; CString m_cs4ByteOut; CString m_csFloatIn; CString m_csFloatOut; }; 

rc

// Microsoft Visual C++ generated resource script. // #include "resource.h" #define APSTUDIO_READONLY_SYMBOLS / // // Generated from the TEXTINCLUDE 2 resource. // #ifndef APSTUDIO_INVOKED #include "targetver.h" #endif #include "afxres.h" #include "verrsrc.h" / #undef APSTUDIO_READONLY_SYMBOLS / // 中文(简体，中国) resources #if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_CHS) LANGUAGE LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED #ifdef APSTUDIO_INVOKED / // // TEXTINCLUDE // 1 TEXTINCLUDE BEGIN "resource.h\0" END 2 TEXTINCLUDE BEGIN "#ifndef APSTUDIO_INVOKED\r\n" "#include ""targetver.h""\r\n" "#endif\r\n" "#include ""afxres.h""\r\n" "#include ""verrsrc.h""\r\n" "\0" END 3 TEXTINCLUDE BEGIN "#define _AFX_NO_SPLITTER_RESOURCES\r\n" "#define _AFX_NO_OLE_RESOURCES\r\n" "#define _AFX_NO_TRACKER_RESOURCES\r\n" "#define _AFX_NO_PROPERTY_RESOURCES\r\n" "\r\n" "#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_CHS)\r\n" "LANGUAGE 4, 2\r\n" "#include ""res\\FloatCalc.rc2"" // 非 Microsoft Visual C++ 编辑的资源\r\n" "#include ""l.CHS\\afxres.rc"" // 标准组件\r\n" "#if !defined(_AFXDLL)\r\n" "#include ""l.CHS\\afxribbon.rc"" // MFC 功能区和控制条资源\r\n" "#endif\r\n" "#endif\r\n" "\0" END #endif // APSTUDIO_INVOKED / // // Icon // // Icon with lowest ID value placed first to ensure application icon // remains consistent on all systems. IDR_MAINFRAME ICON "res\\FloatCalc.ico" / // // Dialog // IDD_ABOUTBOX DIALOGEX 0, 0, 170, 62 STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_POPUP | WS_CAPTION | WS_SYSMENU CAPTION "关于 FloatCalc" FONT 9, "MS Shell Dlg", 0, 0, 0x1 BEGIN ICON IDR_MAINFRAME,IDC_STATIC,14,14,21,20 LTEXT "FloatCalc，版本 1.0",IDC_STATIC,42,14,114,8,SS_NOPREFIX LTEXT "版权所有 (C) 2024",IDC_STATIC,42,26,114,8 DEFPUSHBUTTON "确定",IDOK,113,41,50,14,WS_GROUP END IDD_FLOATCALC_DIALOG DIALOGEX 0, 0, 295, 131 STYLE DS_SETFONT | DS_FIXEDSYS | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME EXSTYLE WS_EX_APPWINDOW FONT 9, "MS Shell Dlg", 0, 0, 0x1 BEGIN CTEXT "转换之前",IDC_STATIC,78,7,65,14,SS_CENTERIMAGE CTEXT "转换之后",IDC_STATIC,149,7,65,14,SS_CENTERIMAGE CTEXT "输入为浮点数",IDC_STATIC,7,29,65,14,SS_CENTERIMAGE EDITTEXT IDC_EDIT_FLOAT_IN,78,29,65,14,ES_AUTOHSCROLL EDITTEXT IDC_EDIT_4BYTES_OUT,149,29,65,14,ES_AUTOHSCROLL | ES_READONLY PUSHBUTTON "浮点数转4字节",IDC_BUTTON_FLOAT_TO_4BYTES,222,29,65,14,BS_CENTER | BS_VCENTER CTEXT "输入为4字节",IDC_STATIC,7,49,65,14,SS_CENTERIMAGE EDITTEXT IDC_EDIT_4BYTES_IN,78,49,65,14,ES_AUTOHSCROLL EDITTEXT IDC_EDIT_FLOAT_OUT,149,49,65,14,ES_AUTOHSCROLL | ES_READONLY PUSHBUTTON "4字节转浮点数",IDC_BUTTON_4BYTES_TO_FLOAT,222,49,65,14,BS_CENTER | BS_VCENTER EDITTEXT IDC_EDIT_TIP,7,69,281,55,ES_MULTILINE | ES_AUTOHSCROLL | ES_READONLY | ES_WANTRETURN END / // // Version // VS_VERSION_INFO VERSIONINFO FILEVERSION 1,0,0,1 PRODUCTVERSION 1,0,0,1 FILEFLAGSMASK 0x3fL #ifdef _DEBUG FILEFLAGS 0x1L #else FILEFLAGS 0x0L #endif FILEOS 0x40004L FILETYPE 0x1L FILESUBTYPE 0x0L BEGIN BLOCK "StringFileInfo" BEGIN BLOCK "080404B0" BEGIN VALUE "CompanyName", "TODO: <公司名>" VALUE "FileDescription", "FloatCalc" VALUE "FileVersion", "1.0.0.1" VALUE "InternalName", "FloatCalc.exe" VALUE "LegalCopyright", "TODO: (C) <公司名>。 保留所有权利。" VALUE "OriginalFilename", "FloatCalc.exe" VALUE "ProductName", "TODO: <产品名>" VALUE "ProductVersion", "1.0.0.1" END END BLOCK "VarFileInfo" BEGIN VALUE "Translation", 0x804, 1200 END END / // // DESIGNINFO // #ifdef APSTUDIO_INVOKED GUIDELINES DESIGNINFO BEGIN IDD_ABOUTBOX, DIALOG BEGIN LEFTMARGIN, 7 RIGHTMARGIN, 163 TOPMARGIN, 7 BOTTOMMARGIN, 55 END IDD_FLOATCALC_DIALOG, DIALOG BEGIN LEFTMARGIN, 7 RIGHTMARGIN, 288 VERTGUIDE, 78 VERTGUIDE, 149 VERTGUIDE, 222 TOPMARGIN, 7 BOTTOMMARGIN, 124 HORZGUIDE, 29 HORZGUIDE, 49 HORZGUIDE, 69 END END #endif // APSTUDIO_INVOKED / // // AFX_DIALOG_LAYOUT // IDD_FLOATCALC_DIALOG AFX_DIALOG_LAYOUT BEGIN 0 END / // // String Table // STRINGTABLE BEGIN IDS_ABOUTBOX "关于 FloatCalc(&A)..." END #endif // 中文(简体，中国) resources / #ifndef APSTUDIO_INVOKED / // // Generated from the TEXTINCLUDE 3 resource. // #define _AFX_NO_SPLITTER_RESOURCES #define _AFX_NO_OLE_RESOURCES #define _AFX_NO_TRACKER_RESOURCES #define _AFX_NO_PROPERTY_RESOURCES #if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_CHS) LANGUAGE 4, 2 #include "res\FloatCalc.rc2" // 非 Microsoft Visual C++ 编辑的资源 #include "l.CHS\afxres.rc" // 标准组件 #if !defined(_AFXDLL) #include "l.CHS\afxribbon.rc" // MFC 功能区和控制条资源 #endif #endif / #endif // not APSTUDIO_INVOKED 

END