用C++实现模拟数字、字母流星雨，其主要用到链表、win32编程基础。
demo实例：
1 // DataRainDemo.cpp : 定义应用程序的入口点。
2 //
3
4 #include "stdafx.h"
5 #include "DataRainDemo.h"
6 #include<time.h>
7 #include<stdlib.h>
8 #include<windows.h>
9 #define STRMINLEN 8
10 #define STRMAXLEN 25
11
12
13
14 //双向链表的每一个节点
15 typedef struct MyList
16 {
17 struct MyList *prev; //前一节点
18 struct MyList *pNext; //下一节点
19 char ch; //数据保存
20 } MyList,*pMyList;
21 //处理数据
22 typedef struct MyListColum
23 {
24 MyList *phead; //整个链表的头
25 MyList *pCurent; //链表所在当前的位置
26 MyList *pTemp; //临时变量
27 int listStrLen; //整个链表的长度
28 int x, y; //链表的位置
29 int iStopTimes;
30 int iMusStopTimes;
31 }StrColum,*pStrColum;
32
33
34 #define MAX_LOADSTRING 100
35
36 // 全局变量:
37 HINSTANCE hInst; // 当前实例
38 WCHAR szTitle[MAX_LOADSTRING]; // 标题栏文本
39 WCHAR szWindowClass[MAX_LOADSTRING]; // 主窗口类名
40
41 // 此代码模块中包含的函数的前向声明:
42 ATOM MyRegisterClass(HINSTANCE hInstance);
43 BOOL InitInstance(HINSTANCE, int);
44 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
45 INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);
46
47 int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
48 _In_opt_ HINSTANCE hPrevInstance,
49 _In_ LPWSTR lpCmdLine,
50 _In_ int nCmdShow)
51 {
52 UNREFERENCED_PARAMETER(hPrevInstance);
53 UNREFERENCED_PARAMETER(lpCmdLine);
54
55 // TODO: 在此放置代码。
56
57 // 初始化全局字符串
58 LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
59 LoadStringW(hInstance, IDC_DATARAINDEMO, szWindowClass, MAX_LOADSTRING);
60 MyRegisterClass(hInstance);
61
62 // 执行应用程序初始化:
63 if (!InitInstance (hInstance, nCmdShow))
64 {
65 return FALSE;
66 }
67 srand(time(NULL));//以时间为种子
68 HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_DATARAINDEMO));
69
70 MSG msg;
71
72 // 主消息循环:
73 while (GetMessage(&msg, nullptr, 0, 0))
74 {
75 if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
76 {
77 TranslateMessage(&msg);
78 DispatchMessage(&msg);
79 }
80 }
81
82 return (int) msg.wParam;
83 }
84 //宽字节 两个字节代表一个字符
85 TCHAR randomChar()
86 {
87 return (rand() % 10 + 98);//0-9的ASCII
88 }
89
90 //
91 // 函数: MyRegisterClass()
92 //
93 // 目的: 注册窗口类。
94 //
95 ATOM MyRegisterClass(HINSTANCE hInstance)
96 {
97 WNDCLASSEXW wcex;
98
99 wcex.cbSize = sizeof(WNDCLASSEX);
100
101 wcex.style = CS_HREDRAW | CS_VREDRAW;
102 wcex.lpfnWndProc = WndProc;
103 wcex.cbClsExtra = 0;
104 wcex.cbWndExtra = 0;
105 wcex.hInstance = hInstance;
106 wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_DATARAINDEMO));
107 wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);
108 wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
109 wcex.lpszMenuName = NULL;//MAKEINTRESOURCEW(IDC_DATARAINDEMO);
110 wcex.lpszClassName = szWindowClass;
111 wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
112
113 return RegisterClassExW(&wcex);
114 }
115
116 //
117 // 函数: InitInstance(HINSTANCE, int)
118 //
119 // 目的: 保存实例句柄并创建主窗口
120 //
121 // 注释:
122 //
123 // 在此函数中，我们在全局变量中保存实例句柄并
124 // 创建和显示主程序窗口。
125 //
126 BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
127 {
128 hInst = hInstance; // 将实例句柄存储在全局变量中
129
130 /*HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
131 CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr);*/
132 /*
133 API 函数原型：
134 HWND WINAPI CreateWindow(
135 _In_opt_ LPCTSTR lpClassName, // 窗口类名称
136 _In_opt_ LPCTSTR lpWindowName, // 窗口标题
137 _In_ DWORD dwStyle, // 窗口风格，或称窗口格式
138 _In_ int x, // 初始 x 坐标
139 _In_ int y, // 初始 y 坐标
140 _In_ int nWidth, // 初始 x 方向尺寸
141 _In_ int nHeight, // 初始 y 方向尺寸
142 _In_opt_ HWND hWndParent, // 父窗口句柄
143 _In_opt_ HMENU hMenu, // 窗口菜单句柄
144 _In_opt_ HINSTANCE hInstance, // 程序实例句柄
145 _In_opt_ LPVOID lpParam // 创建参数
146 );
147
148 注：_In_ 说明该参数是输入的，_opt_ 说明该参数是可选参数（不是说没有参数，而是可以利用宏搭配参数）。
149 */
150 HWND hWnd = CreateWindowW(szWindowClass, NULL, WS_DLGFRAME|WS_THICKFRAME|WS_POPUP,
151 0, 0, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN), nullptr, nullptr, hInstance, nullptr);
152
153 if (!hWnd)
154 {
155 return FALSE;
156 }
157
158 ShowWindow(hWnd, nCmdShow);
159 UpdateWindow(hWnd);
160
161 return TRUE;
162 }
163
164 //
165 // 函数: WndProc(HWND, UINT, WPARAM, LPARAM)
166 //
167 // 目的: 处理主窗口的消息。
168 //
169 // WM_COMMAND - 处理应用程序菜单
170 // WM_PAINT - 绘制主窗口
171 // WM_DESTROY - 发送退出消息并返回
172 //
173 //
174 //初始化每个链表
175 void init(StrColum *cc, int cyScreen, int x)
176 {
177 int j;
178 cc->listStrLen = rand() % (STRMAXLEN - STRMINLEN) + STRMINLEN;
179 cc->x = x+3;
180 cc->y = rand() % 3 ? rand() % cyScreen : 0;
181 cc->iMusStopTimes = rand() % 6;
182 cc->iStopTimes = 0;
183 cc->phead = cc->pCurent = (pMyList)calloc(cc->listStrLen,sizeof(MyList));
184 for ( j = 0; j < cc->listStrLen-1; j++)
185 {
186 cc->pCurent->prev = cc->pTemp;
187 cc->pCurent->ch = '\0';
188 cc->pCurent->pNext = cc->pCurent + 1;
189 cc->pTemp = cc->pCurent++;
190 }
191 cc->pCurent->prev = cc->pTemp;
192 cc->pCurent->ch = '\0';
193 cc->pCurent->pNext = cc->phead;
194 cc->phead->prev = cc->pCurent;
195 cc->pCurent = cc->pTemp = cc->phead;
196 cc->phead->ch = randomChar();
197 }
198 LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
199 {
200 HDC hdc;
201 int i, j, temp, ctn;
202 static HDC hdcMem;
203 HFONT hFont;
204 static HBITMAP hBimtmap;
205 static int cxScreen, cyScreen;
206 static int iFontWidth = 10, iFontHeight = 15, iColumCount;
207 static StrColum *ccChain;
208 switch (message)
209 {
210 case WM_CREATE:
211 {
212 cxScreen = GetSystemMetrics(SM_CXSCREEN);
213 cyScreen = GetSystemMetrics(SM_CYSCREEN);
214 SetTimer(hWnd, 1, 10, NULL);
215 hdc = GetDC(hWnd);
216 hdcMem = CreateCompatibleDC(hdc);
217 hBimtmap = CreateCompatibleBitmap(hdc, cxScreen, cyScreen);
218 SelectObject(hdcMem, hBimtmap);
219 ReleaseDC(hWnd, hdc);
220
221 hFont = CreateFont(iFontHeight, iFontWidth - 5, 0, 0,
222 FW_BOLD, 0, 0, 0, DEFAULT_CHARSET,
223 OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
224 DRAFT_QUALITY, FIXED_PITCH | FF_SWISS,
225 TEXT("Fixedsys"));
226 SelectObject(hdcMem,hFont);
227 DeleteObject(hFont);
228 SetBkMode(hdcMem,TRANSPARENT);
229 //设置显示的列数
230 iColumCount = cxScreen / (iFontWidth * 3 / 2);
231 ccChain = (pStrColum)calloc(iColumCount,sizeof(StrColum));
232 for (int i = 0; i < iColumCount; i++)
233 {
234 init(ccChain + i,cyScreen,(iFontWidth*3/2)*i);
235 }
236 return 0;
237 }
238 break;
239 case WM_COMMAND:
240 {
241 int wmId = LOWORD(wParam);
242 // 分析菜单选择:
243 switch (wmId)
244 {
245 case IDM_ABOUT:
246 DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
247 break;
248 case IDM_EXIT:
249 DestroyWindow(hWnd);
250 break;
251 default:
252 return DefWindowProc(hWnd, message, wParam, lParam);
253 }
254 }
255 break;
256 case WM_PAINT:
257 {
258 PAINTSTRUCT ps;
259 HDC hdc = BeginPaint(hWnd, &ps);
260 // TODO: 在此处添加使用 hdc 的任何绘图代码...
261 EndPaint(hWnd, &ps);
262 }
263 break;
264
265 case WM_DESTROY:
266 KillTimer(hWnd,1);
267 DeleteObject(hBimtmap);
268 DeleteDC(hdcMem);
269 for ( i = 0; i < iColumCount; i++)
270 {
271 free((ccChain+i)->pCurent);
272 }
273 free(ccChain);
274 PostQuitMessage(0);
275 break;
276 default:
277 return DefWindowProc(hWnd, message, wParam, lParam);
278 case WM_TIMER:
279 {
280 hdc = GetDC(hWnd);
281 PatBlt(hdcMem, 0, 0, cxScreen, cyScreen, BLACKNESS);
282 for (int i = 0; i < iColumCount; i++)
283 {
284 ctn = (ccChain + i)->iStopTimes++ >(ccChain + i)->iMusStopTimes;
285 (ccChain + i)->pTemp = (ccChain + i)->phead;
286 SetTextColor(hdcMem,RGB(255,255,255));
287 TextOut(hdcMem,(ccChain+i)->x,(ccChain+i)->y,&((ccChain+i)->pTemp->ch),1);
288 j = (ccChain + i)->y;
289 (ccChain + i)->pTemp = (ccChain + i)->pTemp->pNext;
290 temp = 0;
291 //temp 绿色过度到黑色
292 while ((ccChain+i)->pTemp!=(ccChain+i)->phead
293 &&(ccChain+i)->pTemp->ch)
294 {
295 SetTextColor(hdcMem,RGB(0,255-(255*(temp++)
296 /(ccChain+i)->listStrLen),0));
297 TextOut(hdcMem,(ccChain+i)->x,j-=iFontHeight,
298 &((ccChain+i)->pTemp->ch),1);
299 (ccChain + i)->pTemp = (ccChain + i)->pTemp->pNext;
300 }
301 if (ctn)
302 (ccChain + i)->iStopTimes = 0;
303 else
304 continue;
305 (ccChain + i)->y += iFontHeight;//下次开始显示的地方
306 if ((ccChain+i)->y-(ccChain+i)->listStrLen*iFontHeight>cyScreen)
307 {
308 free((ccChain+i)->pCurent);
309 init(ccChain+i,cyScreen,(iFontWidth*3/2)*i);
310 }
311 (ccChain + i)->phead = (ccChain + i)->phead->prev;
312 (ccChain + i)->phead->ch = randomChar();
313 }
314
315 BitBlt(hdc,0,0,cxScreen,cyScreen,hdcMem,0,0,SRCCOPY);
316 ReleaseDC(hWnd,hdc);
317 }
318 //case WM_RBUTTONDOWN:
319 // KillTimer(hWnd,1);
320 // return 0;
321 //case WM_RBUTTONUP:
322 // SetTimer(hWnd,1,10,NULL);
323 // return 0;
324
325 }
326 return 0;
327 }
328
329
330
331
332
333
334 // “关于”框的消息处理程序。
335 INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
336 {
337 UNREFERENCED_PARAMETER(lParam);
338 switch (message)
339 {
340 case WM_INITDIALOG:
341 return (INT_PTR)TRUE;
342
343 case WM_COMMAND:
344 if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
345 {
346 EndDialog(hDlg, LOWORD(wParam));
347 return (INT_PTR)TRUE;
348 }
349 break;
350 }
351 return (INT_PTR)FALSE;
352 }
实现效果展示