caeser_cipher.cpp

这是我编的包括古典密码

// aeser_Cipher.cpp : implementation file
//

#include "stdafx.h"
#include "MY_CAP.h"
#include "Caeser_Cipher.h"

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

/////////////////////////////////////////////////////////////////////////////
// Caeser_Cipher dialog

CMY_CAPDlg *Main_CapC;
CCaeser_Cipher::CCaeser_Cipher(CWnd* pParent /*=NULL*/)
	: CDialog(CCaeser_Cipher::IDD, pParent)
{
	//{{AFX_DATA_INIT(Caeser_Cipher)
	m_Value_Shift = 0;
	//}}AFX_DATA_INIT
}


void CCaeser_Cipher::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(Caeser_Cipher)
	DDX_Text(pDX, IDC_Value_Shift, m_Value_Shift);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CCaeser_Cipher, CDialog)
	//{{AFX_MSG_MAP(Caeser_Cipher)
	ON_COMMAND(IDD_ENCIPHER, OnEncipher)
	ON_COMMAND(IDD_DECIPHER, OnDecipher)
	ON_COMMAND(IDD_QUIT, OnQuit)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// Caeser_Cipher message handlers

void CCaeser_Cipher::Trans_Dialog(CWnd *temp)
{
	Main_CapC = (CMY_CAPDlg *)temp;
}

void CCaeser_Cipher::OnEncipher() 
{
	// TODO: Add your command handler code here
	Main_CapC->UpdateData(TRUE);
	UpdateData(TRUE);
	m_Ciphertext = "";
	m_Plaintext = Main_CapC->m_Plaintext;
	if( m_Plaintext != "" )
	{
		m_Ciphertext = translation(m_Plaintext,m_Value_Shift);
		Main_CapC -> m_Ciphertext = m_Ciphertext;
		Main_CapC -> UpdateData(FALSE);
		if (Main_CapC -> m_Ciphertext.GetLength () != 0) 
			Main_CapC -> OnSave_Ciphertext();
	}
}

void CCaeser_Cipher::OnDecipher() 
{
	// TODO: Add your command handler code here
	UpdateData(TRUE);
	m_Plaintext = "";
	m_Ciphertext = Main_CapC->m_Ciphertext;
	if( m_Ciphertext != "" )
	{
		m_Plaintext = translation(m_Ciphertext,26-m_Value_Shift);
		Main_CapC -> m_Plaintext = m_Plaintext;
		Main_CapC -> UpdateData(FALSE);
		if (Main_CapC -> m_Plaintext.GetLength () != 0) 
			Main_CapC -> OnSave_Plaintext();
	}
}

CString CCaeser_Cipher::translation(CString plaintext, int Value_Shift)
{

	int i=0;
	CString Ciphertext;
	while ( i < plaintext.GetLength() )
	{
		if( plaintext[i] >= 'a' && plaintext[i] <= 'z' )
		{
			Ciphertext += ((plaintext[i]-'a'+Value_Shift)%26+'a');
		} 
		else if( plaintext[i] >= 'A' && plaintext[i] <= 'Z' )
		{
			Ciphertext += ((plaintext[i]-'A'+Value_Shift)%26+'a');
		}
/*		else
		{
			Ciphertext += plaintext[i];
		}*/
		i++;
	}
	return Ciphertext;
}

void CCaeser_Cipher::OnQuit() 
{
	// TODO: Add your command handler code here
	OnOK();
}