//#include "stdafx.h"#include "DDATest.h"#include "StdAfx.h"#include "DDATestDoc.h"#include "DDATestView.h"#include "LineDlg.h"#include "Line.h"#include "MainFrm.h"#define ROUND(a)((int)(a+0.5))#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE[] = __FILE__;#endif// CDDATestViewIMPLEMENT_DYNCREATE(CDDATestView, CView)BEGIN_MESSAGE_MAP(CDDATestView, CView) //{{AFX_MSG_MAP(CDDATestView) ON_COMMAND(ID_DRAWLINE_DDA, OnDrawlineDda) //}}AFX_MSG_MAP // Standard printing commands ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint) ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint) ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)END_MESSAGE_MAP()// CDDATestView construction/destructionCDDATestView::CDDATestView(){ // TODO: add construction code here}CDDATestView::~CDDATestView(){}BOOL CDDATestView::PreCreateWindow(CREATESTRUCT& cs){ // TODO: Modify the Window class or styles here by modifying // the CREATESTRUCT cs return CView::PreCreateWindow(cs);}// CDDATestView drawingvoid CDDATestView::OnDraw(CDC* pDC){ CDDATestDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc); // TODO: add draw code for native data here}// CDDATestView printingBOOL CDDATestView::OnPreparePrinting(CPrintInfo* pInfo){ // default preparation return DoPreparePrinting(pInfo);}void CDDATestView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/){ // TODO: add extra initialization before printing}void CDDATestView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/){ // TODO: add cleanup after printing}// CDDATestView diagnostics#ifdef _DEBUGvoid CDDATestView::AssertValid() const{ CView::AssertValid();}void CDDATestView::Dump(CDumpContext& dc) const{ CView::Dump(dc);}CDDATestDoc* CDDATestView::GetDocument() // non-debug version is inline{ ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDDATestDoc))); return (CDDATestDoc*)m_pDocument;}#endif //_DEBUG// CDDATestView message handlersvoid CDDATestView::OnDrawlineDda(){ // TODO: Add your command handler code here float x1; float y1; float x2; float y2; CLineDlg dlg; if(dlg.DoModal()==IDOK) { x1=dlg.m_fXStart; y1=dlg.m_fYStart; x2=dlg.m_fXEnd; y2=dlg.m_fYEnd; } CLine * pLine=new CLine(x1,y1,x2,y2); CDC* pDC=GetDC(); pLine->LineDda(pDC); void LineDda(float x1,float y1,float x2,float y2) {int dx=x2-x1,dy=y2-y1,steps,k; float xIncrement,yIncrement,x=x1,y=y1; if(abs(dx)>abs(dy))steps=abs(dx); else steps=abs(dy); xIncrement=dx/(float)steps; yincrement=dy/(float)steps; setPixel(ROUND(x),ROUND(y)); for(k=0;k<steps;k++){ x+=xIncrement; y+=yIncrement; setPixel(ROUND(x),ROUND(y)); } }}那位高手能帮我改一下错！！谢谢！！
D:/学习/计算机图形学/DDATest-Frame/DDATestView.cpp(127) : warning C4244: 'argument' : conversion from 'float' to 'int', possible loss of dataD:/学习/计算机图形学/DDATest-Frame/DDATestView.cpp(127) : warning C4244: 'argument' : conversion from 'float' to 'int', possible loss of dataD:/学习/计算机图形学/DDATest-Frame/DDATestView.cpp(127) : warning C4244: 'argument' : conversion from 'float' to 'int', possible loss of dataD:/学习/计算机图形学/DDATest-Frame/DDATestView.cpp(130) : error C2039: 'LineDda' : is not a member of 'CLine' d:/学习/计算机图形学/ddatest-frame/line.h(15) : see declaration of 'CLine'D:/学习/计算机图形学/DDATest-Frame/DDATestView.cpp(133) : error C2373: 'LineDda' : redefinition; different type modifiersD:/学习/计算机图形学/DDATest-Frame/DDATestView.cpp(133) : error C2601: 'LineDda' : local function definitions are illegal执行 cl.exe 时出错.
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