用C语言实现黑客数字雨(很炫的~~有图有真相)

#define STRMAXLEN 25
#define STRMINLEN 8

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
//////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////
typedef struct tagCharChain
{
struct tagCharChain *prev;
TCHAR ch;
struct tagCharChain *next;
}CharChain, *pCharChain;

typedef struct tagCharColumn
{
CharChain *head, *current, *point;
int x, y, iStrLen;
int iStopTimes, iMustStopTimes;
}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) ;
UpdateWindow (hwnd) ;
ShowCursor(FALSE);

srand ((int) GetCurrentTime ()) ;
while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
ShowCursor(TRUE);
return msg.wParam ;
}

TCHAR randomChar()
{
return (TCHAR)(rand()%(126-33)+33);
}

int init(CharColumn *cc, int cyScreen, int x)
{
int j;
cc->iStrLen = rand()%(STRMAXLEN-STRMINLEN) + STRMINLEN;
cc->x = x+3 ;
cc->y =rand()%3?rand()%cyScreen:0;
cc->iMustStopTimes = rand()%6 ;
cc->iStopTimes = 0 ;
cc->head = cc->current =
(pCharChain)calloc(cc->iStrLen, sizeof(CharChain));
for(j=0; j<cc->iStrLen-1; j++)
{
cc->current->prev = cc->point;
cc->current->ch = '\0';
cc->current->next = cc->current+1;
cc->point = cc->current++; //cc->point = cc->current; cc->current++;
}
cc->current->prev = cc->point;
cc->current->ch = '\0';
cc->current->next = cc->head;
cc->head->prev = cc->current;

cc->current = cc->point = cc->head;
cc->head->ch = randomChar();
return 0;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc ;

int i, j, temp, ctn;
static HDC hdcMem;
HFONT hFont;
static HBITMAP hBitmap;
static int cxScreen, cyScreen;
static int iFontWidth=10, iFontHeight=15, iColumnCount;
static CharColumn *ccChain;

switch (message)
{
case WM_CREATE:
cxScreen = GetSystemMetrics(SM_CXSCREEN) ;
cyScreen = GetSystemMetrics(SM_CYSCREEN) ;
SetTimer (hw

nd, ID_TIMER, 10, NULL) ;

hdc = GetDC(hwnd);
hdcMem = CreateCompatibleDC(hdc);
hBitmap = CreateCompatibleBitmap(hdc, cxScreen, cyScreen);
SelectObject(hdcMem, hBitmap);
ReleaseDC(hwnd, hdc);

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);
iColumnCount = cxScreen/(iFontWidth*3/2);

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) ;
for(i=0; i<iColumnCount; i++)
{
ctn = (ccChain+i)->iStopTimes++ > (ccChain+i)->iMustStopTimes;

(ccChain+i)->point = (ccChain+i)->head;


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;

temp = 0 ;
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;

if( (ccChain+i)->y-(ccChain+i)->iStrLen*iFontHeight > cyScreen)
{
free( (ccChain+i)->current );
init(ccChain+i, cyScreen, (iFontWidth*3/2)*i);
}

(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;


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) ;
}