c语言数字雨（c++数字雨代码）

本文实例为大家分享了C++实现数字雨效果的具体代码，供大家参考，具体内容如下

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 #include <windows.h> #define ID_TIMER 1 #define STRMAXLEN 25 //一个显示列的最大长度 #define STRMINLEN 8 //一个显示列的最小长度 LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; // // typedef struct tagCharChain //整个当作屏幕的一个显示列,这是个双向列表 { struct tagCharChain *prev; //链表的前个元素 TCHAR ch; //一个显示列中的一个字符 struct tagCharChain *next; //链表的后个元素 }CharChain, *pCharChain; typedef struct tagCharColumn { CharChain *head, *current, *point; int x, y, iStrLen; //显示列的开始显示的x,y坐标,iStrLen是这个列的长度 int iStopTimes, iMustStopTimes; //已经停滞的次数和必须停滞的次数,必须停滞的次数是随机的 }CharColumn, *pCharColumn; int main(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) { static TCHAR szAppName[] = TEXT ("matrix") ; HWND hwnd ; MSG msg ; WNDCLASS wndclass ; wndclass.style = CS_HREDRAW | CS_VREDRAW ; 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 (BLACK_BRUSH) ; wndclass.lpszMenuName = NULL ; wndclass.lpszClassName = szAppName ; if(!RegisterClass (&wndclass)) { MessageBox (NULL, TEXT ("此程序必须运行在NT下!"), szAppName, MB_ICONERROR) ; return 0; } hwnd = CreateWindow (szAppName, NULL, WS_DLGFRAME | WS_THICKFRAME | WS_POPUP, 0, 0, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN), NULL, NULL, hInstance, NULL) ; ShowWindow (hwnd, SW_SHOWMAXIMIZED) ; //最大化显示 UpdateWindow (hwnd) ; ShowCursor(FALSE); //隐藏鼠标光标 srand ((int) GetCurrentTime ()) ; //初始化随机数发生器 while (GetMessage (&msg, NULL, 0, 0)) { TranslateMessage (&msg) ; DispatchMessage (&msg) ; } ShowCursor(TRUE); //显示鼠标光标 return msg.wParam ; } TCHAR randomChar() //随机字符产生函数 { return (TCHAR)(rand()%2+48); //字符0或1 } int init(CharColumn *cc, int cyScreen, int x) //初始化 { int j; cc->iStrLen = rand()%(STRMAXLEN-STRMINLEN) + STRMINLEN; //显示列的长度 cc->x = x+3 ; //显示列的开始显示的x坐标 cc->y =rand()%3?rand()%cyScreen:0; //显示列的开始显示的y坐标 cc->iMustStopTimes = rand()%6 ; cc->iStopTimes = 0 ; cc->head = cc->current = (pCharChain)calloc(cc->iStrLen, sizeof(CharChain)); //生成显示列 for(j=0; j<cc->iStrLen-1; j++) { cc->current->prev = cc->point; //cc->point一个显示列的前个元素 cc->current->ch = '\0'; cc->current->next = cc->current+1; //cc->current+1一个显示列的后个元素 cc->point = cc->current++; //cc->point = cc->current; cc->current++; } cc->current->prev = cc->point; //最后一个节点 cc->current->ch = '\0'; cc->current->next = cc->head; cc->head->prev = cc->current; //头节点的前一个为此链的最后一个元素 cc->current = cc->point = cc->head; //free掉申请的内存要用current当参数 cc->head->ch = randomChar(); // 对链表头的元素填充 return 0; } LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { HDC hdc ; //ctn 用来确定一个显示链是否向下前进,如果等待次数超过必须等待的次数,ctn就代表要向下前进 int i, j, temp, ctn; //j为一个显示链中除链表头外的在屏幕上显示的y坐标,temp绿色过度到黑色之用 static HDC hdcMem; HFONT hFont; static HBITMAP hBitmap; static int cxScreen, cyScreen; //屏幕的宽度高度. static int iFontWidth=10, iFontHeight=15, iColumnCount; //字体的宽度高度, 列数 static CharColumn *ccChain; switch (message) { case WM_CREATE: cxScreen = GetSystemMetrics(SM_CXSCREEN) ; //屏幕宽度 cyScreen = GetSystemMetrics(SM_CYSCREEN) ; SetTimer (hwnd, ID_TIMER, 10, NULL) ; hdc = GetDC(hwnd); hdcMem = CreateCompatibleDC(hdc); hBitmap = CreateCompatibleBitmap(hdc, cxScreen, cyScreen); SelectObject(hdcMem, hBitmap); ReleaseDC(hwnd, hdc); //创建字体 hFont = CreateFont(iFontHeight, iFontWidth-5, 0, 0, FW_BOLD, 0, 0, 0, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DRAFT_QUALITY, FIXED_PITCH | FF_SWISS, TEXT("Fixedsys")); SelectObject(hdcMem, hFont); DeleteObject (hFont) ; SetBkMode(hdcMem, TRANSPARENT); //设置背景模式为透明 iColumnCount = cxScreen/(iFontWidth*3/2); //屏幕所显示字母雨的列数 ccChain = (pCharColumn)calloc(iColumnCount, sizeof(CharColumn)); for(i=0; i<iColumnCount; i++) { init(ccChain+i, cyScreen, (iFontWidth*3/2)*i); } return 0 ; case WM_TIMER: hdc = GetDC(hwnd); PatBlt (hdcMem, 0, 0, cxScreen, cyScreen, BLACKNESS) ; //将内存设备映像刷成黑色 for(i=0; i<iColumnCount; i++) { ctn = (ccChain+i)->iStopTimes++ > (ccChain+i)->iMustStopTimes; // (ccChain+i)->point = (ccChain+i)->head; //point用于遍历整个显示列 //第一个字符显示为白色 SetTextColor(hdcMem, RGB(255, 255, 255)); TextOut(hdcMem, (ccChain+i)->x, (ccChain+i)->y, &((ccChain+i)->point->ch), 1); j = (ccChain+i)->y; (ccChain+i)->point = (ccChain+i)->point->next; //遍历整个显示列,将这个显示列里的字符从下往上显示 temp = 0 ; //temp绿色过度到黑色之用 while((ccChain+i)->point != (ccChain+i)->head && (ccChain+i)->point->ch) { SetTextColor(hdcMem, RGB(0, 255-(255*(temp++)/(ccChain+i)->iStrLen), 0)); TextOut(hdcMem, (ccChain+i)->x, j-=iFontHeight, &((ccChain+i)->point->ch), 1); (ccChain+i)->point = (ccChain+i)->point->next; } if(ctn) (ccChain+i)->iStopTimes = 0 ; else continue; (ccChain+i)->y += iFontHeight; //下次开始显示的y坐标为当前的y坐标加上一个字符的高度 //如果开始显示的y坐标减去整个显示列的长度超过了屏幕的高度 if( (ccChain+i)->y-(ccChain+i)->iStrLen*iFontHeight > cyScreen) { free( (ccChain+i)->current ); init(ccChain+i, cyScreen, (iFontWidth*3/2)*i); } //链表的头为此链表的前个元素,因为下次开始显示的时候就相当与在整个显示列的开头添加个元素,然后在开始往上显示 (ccChain+i)->head = (ccChain+i)->head->prev; (ccChain+i)->head->ch = randomChar(); } BitBlt(hdc, 0, 0, cxScreen, cyScreen, hdcMem, 0, 0, SRCCOPY); ReleaseDC(hwnd, hdc); return 0; case WM_RBUTTONDOWN: KillTimer (hwnd, ID_TIMER) ; return 0; case WM_RBUTTONUP: SetTimer (hwnd, ID_TIMER, 10, NULL) ; return 0; //处理善后工作 case WM_KEYDOWN: case WM_LBUTTONDOWN: case WM_DESTROY: KillTimer (hwnd, ID_TIMER) ; DeleteObject(hBitmap); DeleteDC(hdcMem); for(i=0; i<iColumnCount; i++) { free( (ccChain+i)->current ); } free(ccChain); PostQuitMessage (0) ; return 0 ; } return DefWindowProc (hwnd, message, wParam, lParam) ; }