第十五周任务（一）

/* (程序头部注释开始)           

* 程序的版权和版本声明部分           

* Copyright (c) 2011, 烟台大学计算机学院学生            

* All rights reserved.           

* 文件名称：                                         

* 作    者：   刘洋                          

* 完成日期：   2012   年  5 月 31 日           

* 版 本 号：                     

* 对任务及求解方法的描述部分           

* 输入描述：          关于MFC 

* 问题描述：         

* 程序头部的注释结束           

*/      

class Triangle
{
public:
Triangle(){a=1;b=1;c=1;}
Triangle(double x, double y, double z) {a=x; b=y; c=z;}
double area(void);
double perimeter(void);
private:
double a,b,c;

};

#include "stdafx.h"
#include <Cmath>
#include "MyTriangle.h"
double Triangle::area(void)
{ double s=(a+b+c)/2;
return sqrt(s*(s-a)*(s-b)*(s-c));
}
double Triangle::perimeter(void)
{
return (a+b+c);
}

// triangleDlg.cpp : implementation file
//

#include "stdafx.h"
#include "triangle.h"
#include "triangleDlg.h"
#include"MyTriangle.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#endif

// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
CAboutDlg();

// Dialog Data
enum { IDD = IDD_ABOUTBOX };

protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support

// Implementation
protected:
DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()

// CtriangleDlg dialog

CtriangleDlg::CtriangleDlg(CWnd* pParent /*=NULL*/)
: CDialog(CtriangleDlg::IDD, pParent)
, m_a(0)
, m_b(0)
, m_c(0)
, m_area(0)
, m_perimeter(0)
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CtriangleDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
DDX_Text(pDX, IDC_EDIT1, m_a);
DDX_Text(pDX, IDC_EDIT2, m_b);
DDX_Text(pDX, IDC_EDIT3, m_c);
DDX_Text(pDX, IDC_EDIT4, m_area);
DDX_Text(pDX, IDC_EDIT5, m_perimeter);
}

BEGIN_MESSAGE_MAP(CtriangleDlg, CDialog)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
//}}AFX_MSG_MAP
ON_BN_CLICKED(IDC_BUTTON1, &CtriangleDlg::OnBnClickedButton1)
ON_BN_CLICKED(IDC_BUTTON2, &CtriangleDlg::OnBnClickedButton2)
END_MESSAGE_MAP()

// CtriangleDlg message handlers

BOOL CtriangleDlg::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)
{
BOOL bNameValid;
CString strAboutMenu;
bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
ASSERT(bNameValid);
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 CtriangleDlg::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 CtriangleDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting

SendMessage(WM_ICONERASEBKGND, reinterpret_cast<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 function to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CtriangleDlg::OnQueryDragIcon()
{
return static_cast<HCURSOR>(m_hIcon);
}

void CtriangleDlg::OnBnClickedButton1()
{ // TODO: 在此添加控件通知处理程序代码
UpdateData(); //将把界面上各控件输入的值“捕获”到与之关联的变量中
Triangle t1(m_a,m_b,m_c); //定义三角形对象
m_area=t1.area();//求面积
UpdateData(FALSE); //用m_area的值更新界面上对应的控件的值并实现显示
}

void CtriangleDlg::OnBnClickedButton2()
{ // TODO: 在此添加控件通知处理程序代码
UpdateData(); //将把界面上各控件输入的值“捕获”到与之关联的变量中
Triangle t1(m_a,m_b,m_c); //定义三角形对象
m_perimeter=t1.perimeter(); //求面积
UpdateData(FALSE); //用m_area的值更新界面上对应的控件的值并实现显示
}


虽然说窗口化的程序感觉上比较美观吧，但本质上跟以前的“黑框框”程序还是一样的。