口腔黏膜纤维化必须死:有没有C++画图实例啊

vc下新建一个win32 application工程，更多参看<windows程序设计>一书，这本书很好，百度中搜一下，提供下载的地址很多。

/*------------------------------------------------------------------

SYSMETS2.C -- System Metrics Display Program No. 2

(c) Charles Petzold, 1998

------------------------------------------------------------------*/

#include <windows.h>

#include "sysmets.h"

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,

PSTR szCmdLine, int iCmdShow)

{

static TCHAR szAppName[] = TEXT ("SysMets2") ;

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 (WHITE_BRUSH) ;

wndclass.lpszMenuName = NULL ;

wndclass.lpszClassName = szAppName ;

if (!RegisterClass (&wndclass))

{

MessageBox (NULL, TEXT ("This program requires Windows NT!"),

szAppName, MB_ICONERROR) ;

return 0 ;

}

hwnd = CreateWindow (szAppName, TEXT ("Get System Metrics No. 2"),

WS_OVERLAPPEDWINDOW | WS_VSCROLL,

CW_USEDEFAULT, CW_USEDEFAULT,

CW_USEDEFAULT, CW_USEDEFAULT,

NULL, NULL, hInstance, NULL) ;

ShowWindow (hwnd, iCmdShow) ;

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)

{

static int cxChar, cxCaps, cyChar, cyClient, iVscrollPos ;

HDC hdc ;

int i, y ;

PAINTSTRUCT ps ;

TCHAR szBuffer[10] ;

TEXTMETRIC tm ;

switch (message)

{

case WM_CREATE:

hdc = GetDC (hwnd) ;

GetTextMetrics (hdc, &tm) ;

cxChar = tm.tmAveCharWidth ;

cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2 ;

cyChar = tm.tmHeight + tm.tmExternalLeading ;

ReleaseDC (hwnd, hdc) ;

SetScrollRange (hwnd, SB_VERT, 0, NUMLINES - 1, FALSE) ;

SetScrollPos (hwnd, SB_VERT, iVscrollPos, TRUE) ;

return 0 ;

case WM_SIZE:

cyClient = HIWORD (lParam) ;

return 0 ;

case WM_VSCROLL:

switch (LOWORD (wParam))

{

case SB_LINEUP:

iVscrollPos -= 1 ;

break ;

case SB_LINEDOWN:

iVscrollPos += 1 ;

break ;

case SB_PAGEUP:

iVscrollPos -= cyClient / cyChar ;

break ;

case SB_PAGEDOWN:

iVscrollPos += cyClient / cyChar ;

break ;

case SB_THUMBPOSITION:

iVscrollPos = HIWORD (wParam) ;

break ;

default :

break ;

}

iVscrollPos = max (0, min (iVscrollPos, NUMLINES - 1)) ;

if (iVscrollPos != GetScrollPos (hwnd, SB_VERT))

{

SetScrollPos (hwnd, SB_VERT, iVscrollPos, TRUE) ;

InvalidateRect (hwnd, NULL, TRUE) ;

}

return 0 ;

case WM_PAINT:

hdc = BeginPaint (hwnd, &ps) ;

for (i = 0 ; i < NUMLINES ; i++)

{

y = cyChar * (i - iVscrollPos) ;

TextOut (hdc, 0, y,

sysmetrics[i].szLabel,

lstrlen (sysmetrics[i].szLabel)) ;

TextOut (hdc, 22 * cxCaps, y,

sysmetrics[i].szDesc,

lstrlen (sysmetrics[i].szDesc)) ;

SetTextAlign (hdc, TA_RIGHT | TA_TOP) ;

TextOut (hdc, 22 * cxCaps + 40 * cxChar, y, szBuffer,

wsprintf (szBuffer, TEXT ("%5d"),

GetSystemMetrics (sysmetrics[i].iIndex))) ;

SetTextAlign (hdc, TA_LEFT | TA_TOP) ;

}

EndPaint (hwnd, &ps) ;

return 0 ;

case WM_DESTROY:

PostQuitMessage (0) ;

return 0 ;

}

return DefWindowProc (hwnd, message, wParam, lParam) ;

}

这里有一个,可以画一个圆.也有注释.

#include<graphics.h>
main()
{
int driver=DETECT; /* 自动搜索驱动 */
int mode;
initgraph(&driver,&mode,""); /* 初始化 */
cleardevice(); /* 清屏 */
setcolor(2); /*设前景色*/
circle(200,200,50); /*画圆*/
colosgraph(); /* 关闭图形模式 */
}

这是在TC下实现的.如果想知道更多,就搜索一下graphics.h吧