VC+Net案例教程和习题解答.docx

1、VC+Net案例教程和习题解答第1章用MFC开发Windows应用程序习题1安装Visual C+.Net集成开发环境。2启动Visual C+ .Net集成开发环境，熟悉其菜单、工具栏和窗口的操作过程。3模仿书中的例子，编写“Hello，Visual C+ .Net”程序。4编写程序，在窗口中输出两行由字符“*”组成的字符串，中间是“爱国爱校、追求真理、勤奋踏实、艰苦朴素”。第2章窗口类和消息处理机制习题1设计一个应用程序，当单击鼠标左键时，窗口中显示“鼠标左键按下”；当单击鼠标右键时，窗口中显示“鼠标右键按下”。解答：在View类中添加下列变量： char flag;在View类构造函数添

2、加初始化代码： flag= ;添加鼠标左键按下和右键按下消息处理函数，并添加下列消息处理代码，函数如下：void CMy2_1View:OnLButtonDown(UINT nFlags, CPoint point) / TODO: Add your message handler code here and/or call default flag=L; Invalidate(); CView:OnLButtonDown(nFlags, point);void CMy2_1View:OnRButtonDown(UINT nFlags, CPoint point) / TODO: Add yo

3、ur message handler code here and/or call default flag=R; Invalidate(); CView:OnRButtonDown(nFlags, point);修改OnDraw函数如下：void CMy2_1View:OnDraw(CDC* pDC) CMy2_1Doc* pDoc = GetDocument(); ASSERT_VALID(pDoc); / TODO: add draw code for native data here if(flag=L)pDC-TextOut(10,10,_T(鼠标左键按下); if(flag=R)pD

4、C-TextOut(10,10,_T(鼠标右键按下); 2在窗口上绘制一个正方形，当鼠标单击它时，可以在客户区中任意拖动。解答：在View类中添加下列变量： CRect rect; bool capture; CPoint old; 在View类构造函数添加初始化代码： capture=false; rect=CRect(0,0,100,100); 添加鼠标左键按下、左键释放以及鼠标移动消息处理函数，并添加处理代码，函数如下：void CMy2_2View:OnLButtonDown(UINT nFlags, CPoint point) / TODO: Add your message han

5、dler code here and/or call default if(rect.PtInRect(point) capture =true; old=point; CView:OnLButtonDown(nFlags, point);void CMy2_2View:OnMouseMove(UINT nFlags, CPoint point) / TODO: Add your message handler code here and/or call default if(capture) CSize sz=point-old; rect=rect+sz; old=point; this-

6、Invalidate(); CView:OnMouseMove(nFlags, point);void CMy2_2View:OnLButtonUp(UINT nFlags, CPoint point) / TODO: Add your message handler code here and/or call default capture =false; CView:OnLButtonUp(nFlags, point);在OnDraw函数中添加一行代码： pDC-Rectangle(rect);3编写一个程序，在窗口显示一个实心圆，圆自动从窗口左端移动到窗口左端。解答：在View类中添加下

7、列变量： int x,y; 在View类构造函数添加初始化代码： x=0; y=150; 添加视图对象创建消息处理函数，并添加处理代码，函数如下：int CMy2_3View:OnCreate(LPCREATESTRUCT lpCreateStruct) if (CView:OnCreate(lpCreateStruct) = -1) return -1; / TODO: Add your specialized creation code here SetTimer(1,200,NULL); /设置定时器 return 0;添加定时器消息处理函数，并添加处理代码，函数如下：void CMy2

8、_3View:OnTimer(UINT nIDEvent) / TODO: Add your message handler code here and/or call default x=x+5; CRect r; this-GetClientRect(&r); if(r.rightKillTimer(1); this-Invalidate(); CView:OnTimer(nIDEvent);修改OnDraw函数，添加代码如下：void CMy2_3View:OnDraw(CDC* pDC) CMy2_3Doc* pDoc = GetDocument(); ASSERT_VALID(pDo

9、c); / TODO: add draw code for native data here pDC-Ellipse(x,y,x+135,y+135);4编写一个程序，要求鼠标的关标始终指向一个字符串的起始位置，随着鼠标的移动，字符串也跟随移动。解答：在View类中添加下列变量： int locx,locy;在View类中添加鼠标移动消息处理函数，函数内容如下：void CMy2_4View:OnMouseMove(UINT nFlags, CPoint point) / TODO: Add your message handler code here and/or call default

10、locx=point.x; locy=point.y; Invalidate(); CView:OnMouseMove(nFlags, point);在OnDraw函数添加代码，函数如下：void CMy2_4View:OnDraw(CDC* pDC) CMy2_4Doc* pDoc = GetDocument(); ASSERT_VALID(pDoc); / TODO: add draw code for native data here pDC-TextOut(locx,locy,_T(This is a string!);第3章图形设备接口习题1编写一个程序，在窗口客户区绘制一幅包括太阳

11、、蓝天、草地和房子的彩色图画。解答：在OnDraw函数添加代码，函数最终如下所示：void CMy3_1View:OnDraw(CDC* pDC) CMy3_1Doc* pDoc = GetDocument(); ASSERT_VALID(pDoc); / TODO: add draw code for native data here CBrush *pOldBrush, brushSky, brushGrass, brushHouse,brushSun; CRect rect; GetClientRect(&rect); brushSky.CreateSolidBrush(RGB(127,

12、 200, 255); / 画天空 pOldBrush = pDC-SelectObject(&brushSky); pDC-Rectangle(rect); brushGrass.CreateSolidBrush(RGB(0, 255, 0); / 画草地 pDC-SelectObject(&brushGrass); rect.top = 300; pDC-Rectangle(rect); brushSun.CreateSolidBrush(RGB(255, 0, 0); / 画太阳 pDC-SelectObject(&brushSun); pDC-SelectObject(&brushSu

13、n); pDC-Ellipse(30,30,100,100); brushHouse.CreateSolidBrush(RGB(125, 50, 0); / 画房子 pDC-SelectObject(&brushHouse); CPoint m_pointMountain3; / roof m_pointMountain0 = CPoint(400, 200); m_pointMountain1 = CPoint(500, 150); m_pointMountain2 = CPoint(600, 200); pDC-Polygon(m_pointMountain, 3); pDC-Select

14、Object(pOldBrush); pDC-Rectangle(415,200,585,300); /door pDC-Rectangle(435,230,470,300); /window pDC-Rectangle(505,230,525,250); pDC-Rectangle(525,230,545,250); pDC-Rectangle(505,250,525,270); pDC-Rectangle(525,250,545,270);2在一个窗口中央加载一个位图，当单击鼠标左键时位图向上运动，当单击鼠标右键时位图向下运动。解答：在资源中添加bitmap资源IDB_BITMAP1。在V

15、iew类中添加下列变量： CBitmap bmp; int locx,locy; int width,height;在View类构造函数添加初始化代码： bmp.LoadBitmap(IDB_BITMAP1); BITMAP BM; bmp.GetBitmap(&BM); width=BM.bmWidth; height=BM.bmHeight; locx=200; locy=150;在View类中添加鼠标左键按下、鼠标右键按下以及定时器消息处理函数，三个函数如下：void CMy3_2View:OnRButtonDown(UINT nFlags, CPoint point) / TODO:

16、Add your message handler code here and/or call default KillTimer(1); SetTimer(2,200,NULL); CView:OnRButtonDown(nFlags, point);void CMy3_2View:OnLButtonDown(UINT nFlags, CPoint point) / TODO: Add your message handler code here and/or call default KillTimer(2); SetTimer(1,200,NULL); CView:OnLButtonDow

17、n(nFlags, point);void CMy3_2View:OnTimer(UINT nIDEvent) / TODO: Add your message handler code here and/or call default if(nIDEvent=1) locy=locy-5; if(nIDEvent=2) locy=locy+5; Invalidate(); CView:OnTimer(nIDEvent);在OnDraw函数添加代码，函数最终如下所示：void CMy3_2View:OnDraw(CDC* pDC) CMy3_2Doc* pDoc = GetDocument()

18、; ASSERT_VALID(pDoc); / TODO: add draw code for native data here CDC MemDC; MemDC.CreateCompatibleDC(NULL); MemDC.SelectObject(&bmp); pDC-BitBlt(locx,locy,width,height,&MemDC,0,0,SRCCOPY);3编一“猫捉老鼠”游戏程序。用户通过键盘上的上、下、左、右方向键控制猫，5只老鼠由定时器控制在窗口中自由活动，可能随时改变行走方向，遇窗口边界则折回。猫碰到老鼠后则该鼠被吃，不再显示。吃掉所有老鼠后游戏结束并显示所用时间。可

19、为游戏增加难度菜单，控制老鼠的移动速度。解答：在资源中添加bitmap资源IDB_BITMAP1、IDB_BITMAP2、IDB_BITMAP3、IDB_BITMAP4分别代表老鼠向右、下、左、上运动的图像；添加代表猫的bitmap资源IDB_BITMAPCAT。在View类中添加下列变量： int status5; /0-right 1-down 2-left 3-up CRect r5; / the rect of mouse int speed5,step5; / the speed of mouse, how many step the mouse will go / before t

20、urning bool catchit5; /a mouse has been catched or not CBitmap bmp1,bmp2,bmp3,bmp4,bmpCat; /mouse bitmap(4 direction) and cat bitmap CRect cat; / the rect of cat double timeUsed; / have used time bool playStatus; /game status在View类构造函数添加初始化代码，函数如下：CMy3_3View:CMy3_3View() / TODO: add construction cod

21、e here bmp1.LoadBitmap(IDB_BITMAP1); bmp2.LoadBitmap(IDB_BITMAP2); bmp3.LoadBitmap(IDB_BITMAP3); bmp4.LoadBitmap(IDB_BITMAP4); BITMAP BM; bmp1.GetBitmap(&BM); r0.left=20; r0.top=20; r0.bottom=r0.top+BM.bmHeight; r0.right=r0.left+BM.bmWidth; status0=0; speed0=10; step0=6; catchit0=false; r1.left=420;

22、 r1.top=20; r1.bottom=r1.top+BM.bmHeight; r1.right=r1.left+BM.bmWidth; status1=1; speed1=6; step1=6; catchit1=false; r2.left=20; r2.top=350; r2.bottom=r2.top+BM.bmHeight; r2.right=r2.left+BM.bmWidth; status2=0; speed2=12; step2=4; catchit2=false; r3.left=220; r3.top=340; r3.bottom=r3.top+BM.bmHeight

23、; r3.right=r3.left+BM.bmWidth; status3=0; speed3=8; step3=6; catchit3=false; r4.left=420; r4.top=330; r4.bottom=r4.top+BM.bmHeight; r4.right=r4.left+BM.bmWidth; status4=3; speed4=10; step4=6; catchit4=false; bmpCat.LoadBitmap(IDB_BITMAPCAT); bmpCat.GetBitmap(&BM); cat.left=225; cat.top=180; cat.bott

24、om=cat.top+BM.bmHeight; cat.right=cat.left+BM.bmWidth; timeUsed=0; playStatus=false;添加“开始”菜单，并为其添加菜单命令处理函数：void CMy3_3View:OnStart() / TODO: Add your command handler code here this-SetTimer(1,100,NULL); playStatus=true;在View类中添加定时器消息处理函数，添加代码后函数如下：void CMy3_3View:OnTimer(UINT nIDEvent) / TODO: Add y

25、our message handler code here and/or call default if(playStatus) for(int i=0;i=500|stepi=0) statusi=newDirection(i,statusi); else ri.left=ri.left+stepi; ri.right=ri.right+stepi; stepi-; break; case 1: if(ri.bottom+stepi=400|stepi=0) statusi=newDirection(i,statusi); else ri.top=ri.top+stepi; ri.botto

26、m=ri.bottom+stepi; stepi-; break; case 2: if(ri.left-stepi=0|stepi=0) statusi=newDirection(i,statusi); else ri.left=ri.left-stepi; ri.right=ri.right-stepi; stepi-; break; case 3: if(ri.top-stepiInvalidate(); if(catchit0&catchit1&catchit2&catchit3&catchit4) KillTimer(1); playStatus=false; CView:OnTim

27、er(nIDEvent);在View类中添加老鼠转向函数，该函数生成新方向以及沿该方向前进步数：int CMy3_3View:newDirection(int i,int d) int nd=d; while(nd=d) nd=rand()%4; stepi=8+rand()%5; return nd;在View类中添加键盘按下消息处理函数，添加代码后函数如下：void CMy3_3View:OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) / TODO: Add your message handler code here and/or call default if(playStatus) switch(nChar) case VK_UP: if(cat.top=18) cat.top=cat.top-8; cat.bottom=cat.bottom-8; break; case VK_DOWN