MFC简单计算器

路也Orz 华南师范大学 2012-06-04 11:12:16
用MFC编写一个简单计算器,能实现加减乘除运算,

// calculatorDlg.cpp : implementation file
//

#include "stdafx.h"
#include "calculator.h"
#include "calculatorDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CCalculatorDlg dialog

CCalculatorDlg::CCalculatorDlg(CWnd* pParent /*=NULL*/)
: CDialog(CCalculatorDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CCalculatorDlg)
m_edit1 = 0.0;
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
tempvalue=0;
result=0;
sort=0;
append=0;
}

void CCalculatorDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CCalculatorDlg)
DDX_Text(pDX, IDC_EDIT1, m_edit1);
//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCalculatorDlg, CDialog)
//{{AFX_MSG_MAP(CCalculatorDlg)
ON_WM_SYSCOMMAND()
ON_WM_DESTROY()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
ON_BN_CLICKED(IDC_BUTTON3, OnButton3)
ON_BN_CLICKED(IDC_BUTTON4, OnButton4)
ON_BN_CLICKED(IDC_BUTTON5, OnButton5)
ON_BN_CLICKED(IDC_BUTTON6, OnButton6)
ON_BN_CLICKED(IDC_BUTTON7, OnButton7)
ON_BN_CLICKED(IDC_BUTTON8, OnButton8)
ON_BN_CLICKED(IDC_BUTTON9, OnButton9)
ON_BN_CLICKED(IDC_BUTTONequal, OnBUTTONequal)
ON_BN_CLICKED(IDC_BUTTONclean, OnBUTTONclean)
ON_BN_CLICKED(IDC_BUTTONplus, OnBUTTONplus)
ON_BN_CLICKED(IDC_BUTTONminus, OnBUTTONminus)
ON_BN_CLICKED(IDC_BUTTONmulti, OnBUTTONmulti)
ON_BN_CLICKED(IDC_BUTTONdiv, OnBUTTONdiv)
ON_BN_CLICKED(IDC_BUTTONzero, OnBUTTONzero)
ON_BN_CLICKED(IDC_RADIO9, OnRadio9)
ON_BN_CLICKED(IDC_RADIO10, OnRadio10)
ON_BN_CLICKED(IDC_RADIO11, OnRadio11)
ON_BN_CLICKED(IDC_RADIO12, OnRadio12)
ON_BN_CLICKED(IDC_BUTTONsqrt, OnBUTTONsqrt)

ON_BN_CLICKED(IDC_BUTTONdeciamal, OnBUTTONdeciamal)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCalculatorDlg message handlers

BOOL CCalculatorDlg::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 CCalculatorDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}

void CCalculatorDlg::OnDestroy()
{
WinHelp(0L, HELP_QUIT);
CDialog::OnDestroy();
}

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

void CCalculatorDlg::OnButton1()
{
// TODO: Add your control notification handler code here
if(append==1)
result=0;
result=result*10+1;
m_edit1=result;
append=0;
UpdateData(FALSE);

}

void CCalculatorDlg::OnButton2()
{
// TODO: Add your control notification handler code here
if(append==1)
result=0;
result=result*10+2;
m_edit1=result;
append=0;
UpdateData(FALSE);

}

void CCalculatorDlg::OnButton3()
{
// TODO: Add your control notification handler code here
if(append==1)
result=0;
result=result*10+3;
m_edit1=result;
append=0;
UpdateData(FALSE);

}

void CCalculatorDlg::OnButton4()
{
// TODO: Add your control notification handler code here
if(append==1)
result=0;
result=result*10+4;
m_edit1=result;
append=0;
UpdateData(FALSE);

}

void CCalculatorDlg::OnButton5()
{
// TODO: Add your control notification handler code here
if(append==1)
result=0;
result=result*10+5;
m_edit1=result;
append=0;
UpdateData(FALSE);

}

void CCalculatorDlg::OnButton6()
{
// TODO: Add your control notification handler code here
if(append==1)
result=0;
result=result*10+6;
m_edit1=result;
append=0;
UpdateData(FALSE);

}

void CCalculatorDlg::OnButton7()
{
// TODO: Add your control notification handler code here
if(append==1)
result=0;
result=result*10+7;
m_edit1=result;
append=0;
UpdateData(FALSE);

}

void CCalculatorDlg::OnButton8()
{
// TODO: Add your control notification handler code here
if(append==1)
result=0;
result=result*10+8;
m_edit1=result;
append=0;
UpdateData(FALSE);

}

void CCalculatorDlg::OnButton9()
{
// TODO: Add your control notification handler code here
if(append==1)
result=0;
result=result*10+9;
m_edit1=result;
append=0;
UpdateData(FALSE);

}



void CCalculatorDlg::OnBUTTONequal()
{
// TODO: Add your control notification handler code here
switch(sort)
{
case 1:
result=result+tempvalue;
break;
case 2:
result=result-tempvalue;
break;
case 3:
result=result*tempvalue;
break;
case 4:
result=result/tempvalue;
break;

}
m_edit1=result;
UpdateData(FALSE);
}

void CCalculatorDlg::OnBUTTONclean()
{
// TODO: Add your control notification handler code here
tempvalue=0;
result=0;
m_edit1=0.0;
UpdateData(FALSE);

}

void CCalculatorDlg::OnBUTTONplus()
{
// TODO: Add your control notification handler code here
sort=1;
tempvalue=result;
m_edit1=0;
append=1;

}

void CCalculatorDlg::OnBUTTONminus()
{
// TODO: Add your control notification handler code here
sort=2;
tempvalue=result;
m_edit1=0;
append=1;

}

void CCalculatorDlg::OnBUTTONmulti()
{
// TODO: Add your control notification handler code here
sort=3;
tempvalue=result;
m_edit1=0;
append=1;

}

void CCalculatorDlg::OnBUTTONdiv()
{
// TODO: Add your control notification handler code here
sort=4;
tempvalue=result;
m_edit1=0;
append=1;

}



void CCalculatorDlg::OnBUTTONzero()
{
// TODO: Add your control notification handler code here
if(append==1)
result=0;
result=result*10+0;
m_edit1=result;
append=0;
UpdateData(FALSE);

}

void CCalculatorDlg::OnRadio9()
{
// TODO: Add your control notification handler code here
m_edit1=sin(result);
UpdateData(FALSE);

}

void CCalculatorDlg::OnRadio10()
{
// TODO: Add your control notification handler code here
m_edit1=cos(result);
UpdateData(FALSE);

}

void CCalculatorDlg::OnRadio11()
{
// TODO: Add your control notification handler code here
m_edit1=tan(result);
UpdateData(FALSE);

}

void CCalculatorDlg::OnRadio12()
{
// TODO: Add your control notification handler code here
m_edit1=log10(result);
UpdateData(FALSE);

}

void CCalculatorDlg::OnBUTTONsqrt()
{
// TODO: Add your control notification handler code here
m_edit1=sqrt(result);
UpdateData(FALSE);

}



void CCalculatorDlg::OnBUTTONdeciamal()
{
// TODO: Add your control notification handler code here
if(append==1)
result=0;
result=result*10+7;
m_edit1=result;
append=0;
UpdateData(FALSE);

}




实现代码如上
但是小数点按钮不知道怎么实现 求大神指点
...全文
359 点赞 收藏 4
写回复
4 条回复
W170532934 2012年06月05日
貌似楼上的说了个。点击小数点后就先获得文本框内的数据,然后继续往里面添加内容吧。这样获得整个double的大小了
回复 点赞
soulenvy 2012年06月05日
设置一个权值的变量dotpos
初始化dotpos应该大于零的
连续输入5 . 2 的情况
初始化curnum = 0; dotpos =1
输入5 curnum = 5 dotpos = 1
输入小数点时先判断dotpos是否小于等于0,如果是表示已经有一个小数点了,出错,否则dotpos置为0,curnum不做任何操作,值不变,

输入2,因为dotpos<=0表示这个2应该是在出现小数点后面,哪一位就由dotpos确定,将其减一dotpos=-1,权值为10^(-1),curnum=5+0.2=5.2
这样不论你怎么输,任何时候都可以从curnum得到操作数
回复 点赞
xueyuanyuan 2012年06月05日
好长啊。。。
回复 点赞
路也Orz 2012年06月04日
double tempvalue;//存储中间变量
double result;//存储显示结果的值
int sort;//判断后面是何种运算:1、加法 2、减法 3、乘法 4、除法
int append;//判断后面是否添加数字
回复 点赞
发动态
发帖子
新手乐园
创建于2007-09-28

1.4w+

社区成员

4.1w+

社区内容

C/C++ 新手乐园
社区公告
暂无公告