本文實例為大家分享了C語言實現數字雨效果展示的具體代碼，供大家參考，具體內容如下
#include <windows.h>#include <windowsx.h>#define ID_TIMER 1#define STRMAXLEN 25 //一個顯示列的最大長度#define STRMINLEN 8 //一個顯示列的最小長度LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////typedef struct tagCharChain //整個當作屏幕的一個顯示列,這是個雙向列表{ struct tagCharChain *prev; //鏈表的前個元素 TCHAR ch; //一個顯示列中的一個字符 struct tagCharChain *next; //鏈表的后個元素}CharChain, *pCharChain;typedef struct tagCharColumn{ CharChain *head, *current, *point; int x, y, iStrLen; //顯示列的開始顯示的x,y坐標,iStrLen是這個列的長度 int iStopTimes, iMustStopTimes; //已經停滯的次數和必須停滯的次數,必須停滯的次數是隨機的}CharColumn, *pCharColumn;int WINAPI WinMain(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 ; // class style 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 ("此程序必須運行在NT下!"), szAppName, MB_ICONERROR) ; return 0; } hwnd = CreateWindow (szAppName, NULL, WS_DLGFRAME | WS_THICKFRAME | WS_POPUP, // windows style 0, 0, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN), NULL, NULL, hInstance, NULL) ; ShowWindow (hwnd, SW_SHOWMAXIMIZED) ; //最大化顯示 show windows UpdateWindow (hwnd) ; ShowCursor(FALSE); //隱藏鼠標光標 srand ((int) GetCurrentTime ()) ; //初始化隨機數發生器 while (GetMessage (&msg, NULL, 0, 0)) { TranslateMessage (&msg) ; DispatchMessage (&msg) ; } ShowCursor(TRUE); //顯示鼠標光標 return msg.wParam ;}TCHAR randomChar() //隨機字符產生函數{ return (TCHAR)(rand()%(126-33)+33); //33到126之間}int init(CharColumn *cc, int cyScreen, int x) //初始化{ int j; cc->iStrLen = rand()%(STRMAXLEN-STRMINLEN) + STRMINLEN; //顯示列的長度 cc->x = x+3 ; //顯示列的開始顯示的x坐標 cc->y =rand()%3?rand()%cyScreen:0; //顯示列的開始顯示的y坐標 cc->iMustStopTimes = rand()%6 ; cc->iStopTimes = 0 ; cc->head = cc->current = (pCharChain)calloc(cc->iStrLen, sizeof(CharChain)); //生成顯示列 for(j=0; j<cc->iStrLen-1; j++) { cc->current->prev = cc->point; //cc->point一個顯示列的前個元素 cc->current->ch = '/0'; cc->current->next = cc->current+1; //cc->current+1一個顯示列的后個元素 cc->point = cc->current++; //cc->point = cc->current; cc->current++; } cc->current->prev = cc->point; //最后一個節點 cc->current->ch = '/0'; cc->current->next = cc->head; cc->head->prev = cc->current; //頭節點的前一個為此鏈的最后一個元素 cc->current = cc->point = cc->head; //free掉申請的內存要用current當參數 cc->head->ch = randomChar(); // 對鏈表頭的 元素填充 return 0;}LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){ HDC hdc ; //ctn 用來確定一個顯示鏈是否 向下前進,如果等待次數超過必須等待的次數,ctn就代表要向下前進 int i, j, temp, ctn; //j為一個顯示鏈中除鏈表頭外的在屏幕上顯示的y坐標,temp綠色過度到黑色之用 static HDC hdcMem; HFONT hFont; static HBITMAP hBitmap; static int cxScreen, cyScreen; //屏幕的寬度 高度. static int iFontWidth=10, iFontHeight=15, iColumnCount; //字體的寬度 高度, 列數 static CharColumn *ccChain; switch (message) { case WM_CREATE: cxScreen = GetSystemMetrics(SM_CXSCREEN) ; //屏幕寬度 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); //創建字體 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); //設置背景模式為 透明 iColumnCount = cxScreen/(iFontWidth*3/2); //屏幕所顯示字母雨的列數 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) ; //將內存設備映像刷成黑色 for(i=0; i<iColumnCount; i++) { ctn = (ccChain+i)->iStopTimes++ > (ccChain+i)->iMustStopTimes; // (ccChain+i)->point = (ccChain+i)->head; //point用于遍歷整個顯示列 //第一個字符顯示為 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; //遍歷整個顯示列,將這個顯示列里的字符從下往上顯示 temp = 0 ; //temp綠色過度到黑色之用 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; //下次開始顯示的y坐標 為當前的y坐標加上 一個字符的高度 //如果開始顯示的y坐標減去 整個顯示列的長度超過了屏幕的高度 if( (ccChain+i)->y-(ccChain+i)->iStrLen*iFontHeight > cyScreen) { free( (ccChain+i)->current ); init(ccChain+i, cyScreen, (iFontWidth*3/2)*i); } //鏈表的頭 為此鏈表的前個元素,因為下次開始顯示的時候 就相當與在整個顯示列的開頭添加個元素,然后在開始往上顯示 (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; //處理善后工作 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) ;}以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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