MFC 如何将对话框中输入的内容输出到客户区？

可以通过以下代码实现：

CString strInput;
GetDlgItemText(IDC_EDIT_INPUT,strInput);//获取编辑框内容
CRect rcClient;
GetClientRect(&rcClient);//获取客户区矩形
CDC* pDC = GetDC();
pDC->DrawText(strInput,rcClient,DT_WORDBREAK);//在客户区输出内容
ReleaseDC(pDC);

相关问题

mfc 使用pdc输出输入的x值

假设你已经有了一个MFC窗口程序，并且想要使用PDC库来进行输入和输出。以下是一个简单的示例代码，可以让你在窗口程序中输出x的值：

void CMyWnd::OnButtonClicked()
{
   CPaintDC dc(this);
   CString str;

   // 从用户处获取x的值
   int x = GetXFromUser();

   // 将x的值输出到窗口
   str.Format(_T("x = %d"), x);
   dc.TextOut(10, 10, str);
}

int CMyWnd::GetXFromUser()
{
   int x;
   CString str;

   // 弹出一个对话框，让用户输入x的值
   CInputDialog dlg;
   dlg.m_strPrompt = _T("请输入x的值：");
   if (dlg.DoModal() == IDOK)
   {
      // 获取用户输入的字符串并转换成整数
      dlg.m_strInput.Trim();
      x = _tstoi(dlg.m_strInput);
   }

   return x;
}

在上面的代码中，我们在一个按钮被点击时调用 `OnButtonClicked()` 函数，该函数会调用 `GetXFromUser()` 函数来获取用户输入的x的值，然后将其输出到窗口。为了在窗口中输出文本，我们使用了 `CPaintDC` 对象和 `TextOut()` 函数。`CInputDialog` 是一个自定义的对话框类，它用于弹出对话框并获取用户输入的字符串。在 `GetXFromUser()` 函数中，我们首先创建一个 `CInputDialog` 对象，然后弹出对话框并等待用户输入。如果用户单击了“确定”按钮，我们就获取用户输入的字符串并将其转换成整数，然后返回该整数值。

以上仅是一个简单的示例，实际上你需要根据你的具体情况进行调整和修改。如果你需要更多的帮助，可以参考MFC和PDC库的官方文档，或者在网络上寻找更多的资源。

MFC实现输入字符，输出摩斯电码

下面是一个简单的 MFC 程序，可以实现输入字符，输出其对应的摩斯电码，您可以参考一下：

// MorseCodeDlg.h
#pragma once
#include <map>

class CMorseCodeDlg : public CDialogEx
{
public:
    CMorseCodeDlg(CWnd* pParent = nullptr);

#ifdef AFX_DESIGN_TIME
    enum { IDD = IDD_MORSECODE_DIALOG };
#endif

protected:
    virtual void DoDataExchange(CDataExchange* pDX);

    DECLARE_MESSAGE_MAP()

private:
    std::map<char, CString> m_morseCodeMap;

    CString MorseCodeTranslate(const CString& str);

public:
    virtual BOOL OnInitDialog();
    afx_msg void OnBnClickedTranslateButton();
};

// MorseCodeDlg.cpp
#include "pch.h"
#include "MorseCode.h"
#include "MorseCodeDlg.h"
#include "afxdialogex.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

CMorseCodeDlg::CMorseCodeDlg(CWnd* pParent /*=nullptr*/)
    : CDialogEx(IDD_MORSECODE_DIALOG, pParent)
{
    m_morseCodeMap['A'] = ".-";
    m_morseCodeMap['B'] = "-...";
    m_morseCodeMap['C'] = "-.-.";
    m_morseCodeMap['D'] = "-..";
    m_morseCodeMap['E'] = ".";
    m_morseCodeMap['F'] = "..-.";
    m_morseCodeMap['G'] = "--.";
    m_morseCodeMap['H'] = "....";
    m_morseCodeMap['I'] = "..";
    m_morseCodeMap['J'] = ".---";
    m_morseCodeMap['K'] = "-.-";
    m_morseCodeMap['L'] = ".-..";
    m_morseCodeMap['M'] = "--";
    m_morseCodeMap['N'] = "-.";
    m_morseCodeMap['O'] = "---";
    m_morseCodeMap['P'] = ".--.";
    m_morseCodeMap['Q'] = "--.-";
    m_morseCodeMap['R'] = ".-.";
    m_morseCodeMap['S'] = "...";
    m_morseCodeMap['T'] = "-";
    m_morseCodeMap['U'] = "..-";
    m_morseCodeMap['V'] = "...-";
    m_morseCodeMap['W'] = ".--";
    m_morseCodeMap['X'] = "-..-";
    m_morseCodeMap['Y'] = "-.--";
    m_morseCodeMap['Z'] = "--..";
    m_morseCodeMap['0'] = "-----";
    m_morseCodeMap['1'] = ".----";
    m_morseCodeMap['2'] = "..---";
    m_morseCodeMap['3'] = "...--";
    m_morseCodeMap['4'] = "....-";
    m_morseCodeMap['5'] = ".....";
    m_morseCodeMap['6'] = "-....";
    m_morseCodeMap['7'] = "--...";
    m_morseCodeMap['8'] = "---..";
    m_morseCodeMap['9'] = "----.";
    m_morseCodeMap['.'] = ".-.-.-";
    m_morseCodeMap[','] = "--..--";
    m_morseCodeMap['?'] = "..--..";
    m_morseCodeMap['\''] = ".----.";
    m_morseCodeMap['!'] = "-.-.--";
    m_morseCodeMap['/'] = "-..-.";
    m_morseCodeMap['('] = "-.--.";
    m_morseCodeMap[')'] = "-.--.-";
    m_morseCodeMap['&'] = ".-...";
    m_morseCodeMap[':'] = "---...";
    m_morseCodeMap[';'] = "-.-.-.";
    m_morseCodeMap['='] = "-...-";
    m_morseCodeMap['+'] = ".-.-.";
    m_morseCodeMap['-'] = "-....-";
    m_morseCodeMap['_'] = "..--.-";
    m_morseCodeMap['\"'] = ".-..-.";
    m_morseCodeMap['$'] = "...-..-";
    m_morseCodeMap['@'] = ".--.-.";

    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMorseCodeDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CMorseCodeDlg, CDialogEx)
    ON_BN_CLICKED(IDC_TRANSLATE_BUTTON, &CMorseCodeDlg::OnBnClickedTranslateButton)
END_MESSAGE_MAP()

BOOL CMorseCodeDlg::OnInitDialog()
{
    CDialogEx::OnInitDialog();

    SetIcon(m_hIcon, TRUE);
    SetIcon(m_hIcon, FALSE);

    return TRUE;
}

CString CMorseCodeDlg::MorseCodeTranslate(const CString& str)
{
    CString result;

    for (int i = 0; i < str.GetLength(); ++i)
    {
        char ch = str.GetAt(i);

        if (m_morseCodeMap.find(ch) != m_morseCodeMap.end())
        {
            result += m_morseCodeMap[ch];
            result += ' '; // 摩尔斯电码之间用空格隔开
        }
    }

    return result;
}

void CMorseCodeDlg::OnBnClickedTranslateButton()
{
    CString str;
    GetDlgItemText(IDC_INPUT_EDIT, str);

    CString result = MorseCodeTranslate(str);

    SetDlgItemText(IDC_OUTPUT_EDIT, result);
}

在对话框界面中放置两个编辑框和一个按钮，分别是输入编辑框、输出编辑框和翻译按钮。然后在对话框类中定义一个 `m_morseCodeMap` 成员变量，用来存储字符和摩尔斯电码的对应关系。在构造函数中初始化该变量。在 `MorseCodeTranslate` 方法中，通过遍历输入字符串的每个字符，查找其对应的摩尔斯电码，并将结果字符串返回。在 `OnBnClickedTranslateButton` 方法中，获取输入编辑框的内容，调用 `MorseCodeTranslate` 方法进行翻译，将结果显示在输出编辑框中。