更新:
最初的界面
更新后加入了计算sin,cos,tan,exp,log的结果
更新后的界面如下:
微软基础类库(英语:MicrosoftFoundation Classes,简称MFC)是微软公司提供的一个类库(class libraries),以C++类的形式封装了Windows API,并且包含一个应用程序框架,以减少应用程序开发人员的工作量。其中包含大量Windows句柄封装类和很多Windows的内建控件和组件的封装类。
实现的主要功能:通过输入数字,可以进行加减乘除、求根号、取模等计算,通过本代码可以扩展更多的功能。
用MFC实现的一个简单的计算器程序,其功能界面如下
部分代码如下
// CaculatorDlg.cpp : implementation file
//
#include "stdafx.h"
#include "Caculator.h"
#include "CaculatorDlg.h"
#include <string.h>
#include <math.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()
/
// CCaculatorDlg dialog
CCaculatorDlg::CCaculatorDlg(CWnd* pParent /*=NULL*/)
: CDialog(CCaculatorDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CCaculatorDlg)
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CCaculatorDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CCaculatorDlg)
DDX_Control(pDX, IDC_BUTTON_AD, m_numad);
DDX_Control(pDX, IDC_BUTTON_9, m_num9);
DDX_Control(pDX, IDC_BUTTON_8, m_num8);
DDX_Control(pDX, IDC_BUTTON_7, m_num7);
DDX_Control(pDX, IDC_BUTTON_6, m_num6);
DDX_Control(pDX, IDC_BUTTON_5, m_num5);
DDX_Control(pDX, IDC_BUTTON_4, m_num4);
DDX_Control(pDX, IDC_BUTTON_3, m_num3);
DDX_Control(pDX, IDC_BUTTON_1, m_num1);
DDX_Control(pDX, IDC_BUTTON_0, m_num0);
DDX_Control(pDX, EDIT, m_edit);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CCaculatorDlg, CDialog)
//{{AFX_MSG_MAP(CCaculatorDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_BUTTON_1, OnButton1)
ON_BN_CLICKED(IDC_BUTTON_3, OnButton3)
ON_BN_CLICKED(IDC_BUTTON_4, OnButton4)
ON_BN_CLICKED(IDC_BUTTON_5, OnButton5)
ON_BN_CLICKED(IDC_BUTTON_6, OnButton6)
ON_BN_CLICKED(IDC_BUTTON_7, OnButton7)
ON_BN_CLICKED(IDC_BUTTON_8, OnButton8)
ON_BN_CLICKED(IDC_BUTTON_9, OnButton9)
ON_BN_CLICKED(IDC_BUTTON_AD, OnButtonAd)
ON_BN_CLICKED(IDC_BUTTON_C, OnButtonC)
ON_BN_CLICKED(IDC_BUTTON_D, OnButtonD)
ON_BN_CLICKED(IDC_BUTTON_DE, OnButtonDe)
ON_BN_CLICKED(IDC_BUTTON_DI, OnButtonDi)
ON_BN_CLICKED(IDC_BUTTON_EQ, OnButtonEq)
ON_BN_CLICKED(IDC_BUTTON_MU, OnButtonMu)
ON_BN_CLICKED(IDC_BUTTON_S, OnButtonS)
ON_BN_CLICKED(IDC_BUTTON_Y, OnButtonY)
ON_EN_UPDATE(EDIT, OnUpdateEDIT)
ON_BN_CLICKED(IDC_BUTTON_0, OnButton0)
ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
ON_BN_CLICKED(IDC_BUTTON_FU, OnButtonfu)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/
// CCaculatorDlg message handlers
BOOL CCaculatorDlg::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 CCaculatorDlg::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 CCaculatorDlg::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 CCaculatorDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
int count=0;
char b[40];
char c=' ';
int fu=0;
int isd=0;
double sum=0;
int isDoublec=0;
void CCaculatorDlg::OnButton0()
{
// TODO: Add your control notification handler code here
keyNum("0",'0');
}
void CCaculatorDlg::OnButton1()
{
// TODO: Add your control notification handler code here
keyNum("1",'1');
}
void CCaculatorDlg::OnButton2()
{
// TODO: Add your control notification handler code here
keyNum("2",'2');
}
void CCaculatorDlg::OnButton3()
{
// TODO: Add your control notification handler code here
keyNum("3",'3');
}
void CCaculatorDlg::OnButton4()
{
// TODO: Add your control notification handler code here
keyNum("4",'4');
}
void CCaculatorDlg::OnButton5()
{
// TODO: Add your control notification handler code here
keyNum("5",'5');
}
void CCaculatorDlg::OnButton6()
{
// TODO: Add your control notification handler code here
keyNum("6",'6');
}
void CCaculatorDlg::OnButton7()
{
// TODO: Add your control notification handler code here
keyNum("7",'7');
}
void CCaculatorDlg::OnButton8()
{
// TODO: Add your control notification handler code here
keyNum("8",'8');
}
void CCaculatorDlg::OnButton9()
{
// TODO: Add your control notification handler code here
keyNum("9",'9');
}
void CCaculatorDlg::OnButtonAd()
{
// TODO: Add your control notification handler code here
handleResult('+');
}
void CCaculatorDlg::OnButtonC()
{
// TODO: Add your control notification handler code here
m_edit.SetSel(0,-1);
m_edit.ReplaceSel("0");
int len=strlen(b);
for(int i=0; i<len;i++)
{
b[i]=NULL;
}
sum=0;
count=0;
fu=0;
isd=0;
isDoublec=0;
}
void CCaculatorDlg::OnButtonD()
{
// TODO: Add your control notification handler code here
m_edit.GetWindowText(b,20);
int len=strlen(b);
for(int i=0;i<len;i++)
if(b[i]=='.')
break;
if(i==len)
{
b[len]='.';
b[len+1]='\0';
}
m_edit.SetWindowText(b);
isd=1;
}
void CCaculatorDlg::OnButtonDe()
{
// TODO: Add your control notification handler code here
handleResult('-');
}
void CCaculatorDlg::OnButtonDi()
{
// TODO: Add your control notification handler code here
handleResult('/');
}
void CCaculatorDlg::OnButtonEq()
{
// TODO: Add your control notification handler code here
isDoublec=0;
handleResult(' ');
count=0;
sum=0;
isDoublec=0;
}
void CCaculatorDlg::OnButtonMu()
{
// TODO: Add your control notification handler code here
handleResult('*');
}
void CCaculatorDlg::OnButtonS()
{
// TODO: Add your control notification handler code here
if(fu==1)
return;
isDoublec=0;
handleResult(' ');
count=0;
sum=0;
isDoublec=0;
m_edit.GetWindowText(b,20);
double n=atof(b);
if(n >= 0)
{
n=sqrt(n);
CString szTemp;
szTemp.Format(_T("%g"),n);
m_edit.SetWindowText(szTemp);
count=0;
isDoublec=0;
}
}
void CCaculatorDlg::OnButtonY()
{
// TODO: Add your control notification handler code here
handleResult('%');
}
void CCaculatorDlg::OnUpdateEDIT()
{
// TODO: If this is a RICHEDIT control, the control will not
// send this notification unless you override the CDialog::OnInitDialog()
// function to send the EM_SETEVENTMASK message to the control
// with the ENM_UPDATE flag ORed into the lParam mask.
// TODO: Add your control notification handler code here
// char a[10];
// scanf("%c",&a);
// m_edit.SetWindowText(a);
}
void CCaculatorDlg::OnButtonfu()
{
// TODO: Add your control notification handler code here
char isZero[20];
m_edit.GetWindowText(isZero,20);
if (atof(isZero) <0)
fu=1;
if(fu==0 && isZero [0] != '0')
{
m_edit.GetWindowText(b,20);
int len=strlen(b);
for(int i=len;i>0;i--)
b[i]=b[i-1];
b[0]='-';
b[len+1]='\0';
m_edit.SetWindowText(b);
fu=1;
}
else if(fu==1)
{
m_edit.GetWindowText(b,20);
int len=strlen(b);
for(int i=0;i<len;i++)
b[i]=b[i+1];
m_edit.SetWindowText(b);
fu=0;
}
}
BOOL CCaculatorDlg::PreTranslateMessage(MSG* pMsg)
{
// TODO: Add your specialized code here and/or call the base class
if(pMsg->wParam == VK_RETURN)//当按下键为回车键时
{
isDoublec=0;
handleResult(' ');
count=0;
sum=0;
return TRUE;
}
switch(LOWORD(pMsg->wParam))
{
case '0':keyNum("0",'0');break;
case '1':keyNum("1",'1');break;
case '2':keyNum("2",'2');break;
case '3':keyNum("3",'3');break;
case '4':keyNum("4",'4');break;
case '5':keyNum("5",'5');break;
case '6':keyNum("6",'6');break;
case '7':keyNum("7",'7');break;
case '8':keyNum("8",'8');break;
case '9':keyNum("9",'9');break;
case '.':{
m_edit.GetWindowText(b,20);
int len=strlen(b);
for(int i=0;i<len;i++)
if(b[i]=='.')
break;
if(i==len)
{
b[len]='.';
b[len+1]='\0';
}
m_edit.SetWindowText(b);
isd=1;
};break;
case '+': handleResult('+');break;
case '-': handleResult('-');break;
case '*': handleResult('*');break;
case '/': handleResult('/');break;
//case '=': handleResult('=');break;
}
return CDialog::PreTranslateMessage(pMsg);
}
void CCaculatorDlg::handleResult(char newc)
{
if(isDoublec == 0)
{
m_edit.GetWindowText(b,20);
if(c=='+')
sum=sum+atof(b);
else
if(c=='-')
sum=sum-atof(b);
else
if(c=='*')
sum*=atof(b);
else
if(c=='/'&&atof(b)!=0)
sum/=atof(b);
else
if( c=='/'&&atof(b)==0)
// 提示错误
MessageBox("除数不能为零!");
else
if(c=='%' )
{
if(isInt(sum) && isInt(atof(b)) && atof(b) != 0)
{
int yuNo= (int) sum;
int y=(int) atof(b);
yuNo %= y;
sum= (double) yuNo;
}
else
MessageBox("该数不能取余!");
}
else
sum=atof(b);
c=newc;
// isDoublec=1;
count=0;
isd=0;
CString szTemp;
szTemp.Format(_T("%.12g"),sum);
m_edit.SetWindowText(szTemp);
}
else if(isDoublec ==1)
{
c=newc;
isDoublec =0;
}
isDoublec=1;
}
BOOL CCaculatorDlg::isInt(double a)
{
const double eps = 1e-10; // 精度范围
if (a < 0)
{
if (-a + (double)((int)a) < eps)
{
return true;
}
else
return false;
}
else
{
if (a - (double)((int)a) < eps)
{
return true;
}
else
return false;
}
}
void CCaculatorDlg::keyNum(char *no,char n)
{
if(count==0 && isd == 0)
{
m_edit.SetSel(0,-1);
m_edit.ReplaceSel(no);
}
else
{
m_edit.GetWindowText(b,20);
int len=strlen(b);
b[len]=n;
b[len+1]='\0';
m_edit.SetWindowText(b);
}
if (n !='0')
count=1;
isDoublec = 0;
}
获取完整代码请查看全文
未经允许不得转载!c++大作业:基于MFC的计算器实现(带文档)