Question4_6.rar_正弦曲线运动

#include<windows.h> #include<string.h> #include<stdlib.h> #include<stdio.h> #include<math.h> LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM); POINT point[100]; double pai=3.1415926; int i=0,j=0; long c; int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInst,LPSTR lpszCmdLine,int nCmdShow) { HWND hwnd; MSG Msg; WNDCLASS wndclass; char lpszClassName[] = "正弦运动"; char lpszTitle[] = "windows"; wndclass.style = 0; wndclass.lpfnWndProc = WndProc; wndclass.cbClsExtra = 0; wndclass.cbWndExtra = 0; wndclass.hInstance = hInstance; wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION); wndclass.hCursor = LoadCursor(NULL,IDC_ARROW); wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); wndclass.lpszMenuName = NULL; wndclass.lpszClassName = lpszClassName; if(!RegisterClass(&wndclass)) { MessageBeep(0); return FALSE; } hwnd = CreateWindow ( lpszClassName, lpszTitle, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL ); ShowWindow(hwnd,nCmdShow); UpdateWindow(hwnd); while(GetMessage(&Msg,NULL,0,0)) { TranslateMessage(&Msg); DispatchMessage(&Msg); } return Msg.wParam; } LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam) { HDC hdc; PAINTSTRUCT ps; HPEN hP; HBRUSH hB; switch(message) { case WM_PAINT: hdc=BeginPaint(hwnd,&ps); SetMapMode(hdc,MM_TEXT); hP=CreatePen(PS_SOLID,2,RGB(255,0,0)); SelectObject(hdc,hP); for(i=0;i<100;i++) { point[i].x = (long)(i*2*pai/100*100+200); point[i].y = (long)(-100*sin(i*2*pai/100)+200); } Polyline(hdc,point,100); if(j%100<=25) { hP=CreatePen(PS_SOLID,6,RGB(255,255,0)); hB=CreateSolidBrush(RGB(0,0,0)); } else if(j%100<=50) { hP=CreatePen(PS_SOLID,6,RGB(255,0,255)); hB=CreateSolidBrush(RGB(0,0,255)); } else if(j%100<=75) { hP=CreatePen(PS_SOLID,6,RGB(0,255,255)); hB=CreateSolidBrush(RGB(0,255,0)); } else { hP=CreatePen(PS_SOLID,6,RGB(0,0,0)); hB=CreateSolidBrush(RGB(255,0,0)); } SelectObject(hdc,hP); SelectObject(hdc,hB); c=(long)(j%25*1.6+20); Ellipse(hdc,point[j%100].x-c,point[j%100].y-c,point[j%100].x+c,point[j%100].y+c); InvalidateRect(hwnd,NULL,1); Sleep(100); j++; EndPaint(hwnd,&ps); DeleteObject(hB); DeleteObject(hP); return 0; case WM_DESTROY: PostQuitMessage(0); return 0; default: return DefWindowProc(hwnd,message,wParam,lParam); } return 0; }