计算方法实验报告(4)

}

}

}

pSysMenu->AppendMenu(MF_SEPARATOR);

pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);

// 设置此对话框的图标。当应用程序主窗口不是对话框时，框架将自动 // 执行此操作

SetIcon(m_hIcon, TRUE);

// 设置大图标

SetIcon(m_hIcon, FALSE);

// 设置小图标

// TODO: 在此添加额外的初始化代码 start=false;

return TRUE; // 除非将焦点设置到控件，否则返回 TRUE

void CchazhiDlg::OnSysCommand(UINT nID, LPARAM lParam) { }

// 如果向对话框添加最小化按钮，则需要下面的代码

// 来绘制该图标。对于使用文档/视图模型的 MFC 应用程序， // 这将由框架自动完成。

void CchazhiDlg::OnPaint() {

start = true; drawxy(); xy.n = -1;

for (int i = 0; i<20; i++) { }

if (IsIconic()) {

CPaintDC dc(this); // 用于绘制的设备上下文 xy.x[i] = 0; xy.y[i] = 0;

if ((nID & 0xFFF0) == IDM_ABOUTBOX) { } else { }

CDialogEx::OnSysCommand(nID, lParam); CAboutDlg dlgAbout; dlgAbout.DoModal();

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}

//当用户拖动最小化窗口时系统调用此函数取得光标 //显示。

HCURSOR CchazhiDlg::OnQueryDragIcon() { }

void CchazhiDlg::OnBnClickedButton1() {

if(start){

CWnd *pwnd=AfxGetMainWnd(); CDC *pDC=pwnd->GetDC();

CPen pen(PS_SOLID,2,RGB(255,0,0)); pDC->SelectObject(&pen);

pDC->MoveTo(int(uchangex(xy.x[0])),int (uchangey((xy.y[0])))); for(int x=int(xy.x[0]);x<=xy.x[xy.n];x++){ double result=0;

for(int i=0;i<=xy.n;i++){ }

pDC->LineTo(int(uchangex(x)),int (uchangey(result))); Sleep(10);

result+=l(x,i,xy.n,xy)*xy.y[i]; return static_cast(m_hIcon); } else { }

CDialogEx::OnPaint(); // 绘制图标

dc.DrawIcon(x, y, m_hIcon);

// 使图标在工作区矩形中居中

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;

SendMessage(WM_ICONERASEBKGND, reinterpret_cast(dc.GetSafeHdc()), 0);

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}

}

pwnd->ReleaseDC(pDC); }

// TODO: 在此添加控件通知处理程序代码

void CchazhiDlg::OnBnClickedButton4() { }

void drawxy(){ }

double changex(double x){ }

double uchangex(double x){ return x+350; }

double changey(double y){ }

return -y+180; return x-350;

CWnd *pwnd=AfxGetMainWnd(); CDC *pDC=pwnd->GetDC(); pDC->MoveTo(120,180); pDC->LineTo(600,180); pDC->LineTo(594,174); pDC->MoveTo(600,180); pDC->LineTo(594,186); pDC->MoveTo(350,380); pDC->LineTo(350,0); pDC->LineTo(356,6); pDC->MoveTo(350,0); pDC->LineTo(344,6); pDC->MoveTo(120,0); pDC->TextOutA(355,0,\); pDC->TextOutA(590,182,\); pwnd->ReleaseDC(pDC);

// TODO: 在此添加控件通知处理程序代码

// pDC->TextOutA(340,185,\

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double uchangey(double y){ return -y+180; }

void CchazhiDlg::OnLButtonDown(UINT nFlags, CPoint point) { }

double l(double xv,int i,int n,date xy) {

double t=1;

for(int j=0;j<=n;j++) if(j!=i)

t=t*(xv-xy.x[j])/(xy.x[i]-xy.x[j]); return t;

}

CDialogEx::OnLButtonDown(nFlags, point);

}

temp=xy.y[j]; xy.y[j]=xy.y[j+1]; xy.y[j+1]=temp; }

for(int i=0;i

for(int j=0;j

if(xy.x[j]>xy.x[j+1]){ double temp=0; temp=xy.x[j]; xy.x[j]=xy.x[j+1]; xy.x[j+1]=temp;

// TODO: 在此添加消息处理程序代码和/或调用默认值 CWnd *pwnd=AfxGetMainWnd(); CDC *pDC=pwnd->GetDC();

if(start){ }

if(point.x>120&&point.x<600&&point.y>0&&point.y<380){ pDC->Ellipse(point.x-2,point.y-2,point.x+2,point.y+2); xy.n++;

xy.x[xy.n]=changex(double (point.x)); xy.y[xy.n]=changey(double (point.y)); }

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}

void CchazhiDlg::OnBnClickedButton2() {

for(int i=xy.x[0];i<=xy.x[xy.n];i++){ }

pwnd->ReleaseDC(pDC); }

double result=0;

for(int j=0;j<=xy.n;j++){ }

pDC->LineTo(int ( uchangex(i)),int (uchangey(result))); Sleep(10);

double temp=1; for(int k=0;k

temp*=(i-xy.x[k]);

for(int j=1;j<=xy.n;j++){ }

for(int i=j;i<=xy.n;i++)

chashang[i][j]=(chashang[i][j-1]-chashang[i-1][j-1])/(xy.x[i]-xy.x[i-j]);

for(int i=0;i<=xy.n;i++){ }

chashang[i][0]=xy.y[i]; chashang=new double *[20]; for(int i=0;i<20;i++){ chashang[i]=new double [20]; for(int j=0;j<20;j++){ chashang[i][j]=0; } }

if(start){

CWnd *pwnd=AfxGetMainWnd(); CDC *pDC=pwnd->GetDC();

CPen pen(PS_SOLID,2,RGB(0,0,0)); pDC->SelectObject(&pen);

pDC->MoveTo(int(uchangex(xy.x[0])),int (uchangey((xy.y[0])))); double **chashang;

result+=chashang[j][j]*temp;

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