Visual c++\vc++课后作业\VC黄维通源代码\VC黄维通源代码

#include <windows.h> #include <stdlib.h> #include <string.h> #include <math.h> #define Pi 3.1415926 long WINAPI WndProc(HWND hWnd, UINT iMessage, UINT wParam, LONG lParam); //消息处理函数声明. BOOL InitWindowsClass(HINSTANCE hInstance); //初始化窗口类声明 BOOL InitWindows(HINSTANCE hInstance, int nCmdShow);//初始化窗口声明. HWND hWndMain; int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) //主函数 { MSG Message; if(!InitWindowsClass(hInstance)) //初始化窗口类. return FALSE; if(!InitWindows(hInstance,nCmdShow)) //初始化窗口. return FALSE; while(GetMessage(&Message,0,0,0)) { TranslateMessage(&Message); //消息循环. DispatchMessage(&Message); } return Message.wParam; } long WINAPI WndProc(HWND hWnd, UINT iMessage, UINT wParam, LONG lParam) //消息处理函数. { HDC hDC; //定义设备环境句柄. HBRUSH hBrush; //定义画刷句柄 HPEN hPen; //定义画笔句柄 PAINTSTRUCT PtStr; //定义包含绘图信息的结构体变量 double dfRadious0=100.0,dfRadious1; //定义外部和内部正五边形外接圆半径. POINT lpOuterPoints[5],lpInnerPoints[5];//定义外,内正五边形点结构数组. POINT lpTriangle[3]; //定义三角形点结构数组. dfRadious1=dfRadious0*sin(0.1*Pi)/sin(126.0/180*Pi);//根据外圆半径计算内园半径. //计算内外正五边形的点坐标. for(int i=0;i<5;i++) { lpOuterPoints[i].x=(long)(dfRadious0*cos(i*72.0/180*Pi)); lpOuterPoints[i].y=(long)(dfRadious0*sin(i*72.0/180*Pi)); lpInnerPoints[i].x=(long)(dfRadious1*cos(i*72.0/180*Pi+36.0/180*Pi)); lpInnerPoints[i].y=(long)(dfRadious1*sin(i*72.0/180*Pi+36.0/180*Pi)); } switch(iMessage) { case WM_PAINT: //处理绘图消息. hDC=BeginPaint(hWnd,&PtStr); //得到设备环境句柄 SetMapMode(hDC,MM_ANISOTROPIC); //设置映射模式. SetWindowOrgEx(hDC,-100,-100,NULL); //设置坐标原点. hPen=CreatePen(PS_SOLID,1,RGB(255,0,0)); //创新红色画笔. SelectObject(hDC,hPen); //将画笔选入. Polygon(hDC,lpOuterPoints,5); //画正五边形. //填充正五边形的不同区域. for(i=0;i<5;i++) { lpTriangle[0]=lpOuterPoints[i%5]; //生成图形中的三角形区域的坐标. lpTriangle[1]=lpInnerPoints[i%5]; lpTriangle[2]=lpOuterPoints[(i+1)%5]; //创新新画刷. hBrush=CreateSolidBrush(RGB(i*10,i*20,i*30)); SelectObject(hDC,hBrush); //选入新画刷. Polygon(hDC,lpTriangle,3); //画三角形区域. lpTriangle[2]=lpInnerPoints[(i+4)%5]; //生成图形中的三角形区域的坐标. hBrush=CreateSolidBrush(RGB(i*40,i*30,i*20));//创新画刷. SelectObject(hDC,hBrush); //选入画刷. Polygon(hDC,lpTriangle,3); //画三角形区域. } hBrush=CreateSolidBrush(RGB(255,255,255));//创新白画刷. SelectObject(hDC,hBrush); //选入画刷. Polygon(hDC,lpInnerPoints,5); //画中心的五边形. //用不同种颜色的画笔来绘制五角星. MoveToEx(hDC,lpOuterPoints[0].x,lpOuterPoints[0].y,NULL); for(i=1;i<=5;i++) { hPen=CreatePen(PS_SOLID,1,RGB(0,i*51,0)); SelectObject(hDC,hPen); LineTo(hDC,lpOuterPoints[(i+2)%5].x,lpOuterPoints[(i+2)%5].y); } hPen=(HPEN)(GetStockObject(PS_NULL)); DeleteObject(hPen); //删除画笔. DeleteObject(hBrush); //删除画刷. EndPaint(hWnd,&PtStr); //结束绘图. return 0; case WM_DESTROY: //处理关闭窗口信息. PostQuitMessage(0); //向应用程序发送WM_QUIT消息. return 0; default: return(DefWindowProc(hWnd,iMessage,wParam,lParam)); } } BOOL InitWindows(HINSTANCE hInstance, int nCmdShow) //初始化 { HWND hWnd; //定义窗口句柄. hWnd=CreateWindow("Polygon", //窗口类名. "五边形", //窗口实例标题. WS_OVERLAPPEDWINDOW, //窗口风格.带边框,标题栏,系统菜单和最大和最小按钮. CW_USEDEFAULT, //窗口左上角坐标. 0, //窗口左上角坐标. CW_USEDEFAULT, //窗口宽度 0, //窗口高度 NULL, //无父窗口. NULL, //无主菜单. hInstance, //创建此窗口的应用程序的当前句柄. NULL); //指向一个传递给窗口的参数值从指针. //不使用该值. if(!hWnd) //如果窗口创建失败,返回false. return FALSE; hWndMain=hWnd; //将窗口句柄传递给全局变量. ShowWindow(hWnd,nCmdShow); //显示窗口. UpdateWindow(hWnd); //更新并绘制用户区. return TRUE; } BOOL InitWindowsClass(HINSTANCE hInstance) //初始化窗口类. { WNDCLASS WndClass; //定义窗口类. WndClass.cbClsExtra=0; //窗口类无扩展. WndClass.cbWndExtra=0; //窗口实例无扩展. WndClass.hbrBackground=(HBRUSH)(GetStockObject(WHITE_BRUSH));//窗口背景为白色. WndClass.hCursor=LoadCursor(NULL,IDC_ARROW); //窗口采用箭头光标. WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION); //窗口的最小化图标为缺省图标. WndClass.hInstance=hInstance; //当前实例句柄. WndClass.lpfnWndProc=WndProc; //窗口处理函数. WndClass.lpszClassName="Polygon"; //窗口类名. WndClass.lpszMenuName=NULL; //无菜单 WndClass.style=0; //窗口类型为缺省类型. return RegisterClass(&WndClass); //返回注册窗口的值. }