mddlg.cpp

我是C初级学者。做了一个简单的程序 关于计算最大公约数的

// MDDlg.cpp : implementation file
//

#include "stdafx.h"
#include "MD.h"
#include "MDDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMDDlg dialog

CMDDlg::CMDDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMDDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMDDlg)
	m_num1 = 0;
	m_num2 = 0;
	m_result = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	n_Num1=0;
	n_Num2=0;
	n_Result=0;
}

void CMDDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMDDlg)
	DDX_Control(pDX, IDC_EDIT3, m_CResult);
	DDX_Text(pDX, IDC_EDIT1, m_num1);
	DDX_Text(pDX, IDC_EDIT2, m_num2);
	DDX_Text(pDX, IDC_EDIT3, m_result);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMDDlg, CDialog)
	//{{AFX_MSG_MAP(CMDDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_COMPUTE, OnCompute)
	ON_BN_CLICKED(IDC_RESET, OnReset)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMDDlg message handlers

BOOL CMDDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// 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
}

// 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 CMDDlg::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 CMDDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CMDDlg::OnCompute() 
{
	// TODO: Add your control notification handler code here
	UpdateData();
	n_Num1=m_num1;
	n_Num2=m_num2;
	if((n_Num1<=0)||(n_Num2<=0))
		::AfxMessageBox("请输入大于0的整数!");
	else
	{
		n_Result=Compute(n_Num1,n_Num2);
		m_result=n_Result;
	}
/*	char sz[20];
	sprintf(sz,"%d",m_result);//类型转换1*/
/*	CString sz;
	sz.Format("%d",m_result);类型转换2*/
	char sz[20];
	_itoa(m_result,sz,10);//整形数据转换为十进制输出
//	_itoa(m_result,sz,16);//转换为16进制输出
//	_itoa(m_result,sz,2);//转换为2进制输出
/*如果是long类型的数据向外出可以用
	_ltoa(要转换的数据,sz,10)转换为10进制格式输出*/
	m_CResult.SetWindowText(sz);
}

void CMDDlg::OnReset() 
{
	// TODO: Add your control notification handler code here
		m_num1 = 0;
	m_num2 = 0;
	m_result = 0;
	this->UpdateData(false);
}

int CMDDlg::Compute(int a, int b)
{
	int max,min;
	max=a>b?a:b;
	min=a+b-max;
	int temp;
	while(min)
	{
		temp=min;
		min=max%min;
		max=temp;
	}
	return max;

}