求一个能运行的Bresenham画线算法,如果能用鼠标画就更好了,最好是用C++写的.采纳后会再送上100分!要是有源文件就好了,我对这个不是很清楚呀!

求一个能运行的Bresenham画线算法,如果能用鼠标画就更好了,最好是用C++写的.采纳后会再送上100分!要是有源文件就好了,我对这个不是很清楚呀!
求一个能运行的Bresenham画线算法,如果能用鼠标画就更好了,最好是用C++写的.采纳后会再送上100分!
要是有源文件就好了,我对这个不是很清楚呀!

求一个能运行的Bresenham画线算法,如果能用鼠标画就更好了,最好是用C++写的.采纳后会再送上100分!要是有源文件就好了,我对这个不是很清楚呀!
#include
void Bresenham(HDC hdc,int x1,int y1,int x2,int y2);
/* Declare Windows procedure */
LRESULT CALLBACK WindowProcedure (HWND,UINT,WPARAM,LPARAM);
/* Make the class name into a global variable */
char szClassName[ ] = "WinClassName";
int WINAPI WinMain (HINSTANCE hThisInstance,
HINSTANCE hPrevInstance,
LPSTR lpszArgument,
int nCmdShow)
{
HWND hwnd; /* This is the handle for our window */
MSG msg; /* Here messages to the application are saved */
WNDCLASSEX wincl; /* Data structure for the windowclass */
/* The Window structure */
wincl.hInstance = hThisInstance;
wincl.lpszClassName = szClassName;
wincl.lpfnWndProc = WindowProcedure; /* This function is called by windows */
wincl.style = CS_DBLCLKS; /* Catch double-clicks */
wincl.cbSize = sizeof (WNDCLASSEX);
/* Use default icon and mouse-pointer */
wincl.hIcon = LoadIcon (NULL,IDI_APPLICATION);
wincl.hIconSm = LoadIcon (NULL,IDI_APPLICATION);
wincl.hCursor = LoadCursor (NULL,IDC_CROSS);
wincl.lpszMenuName = NULL; /* No menu */
wincl.cbClsExtra = 0; /* No extra bytes after the window class */
wincl.cbWndExtra = 0; /* structure or the window instance */
/* Use Windows's default colour as the background of the window */
wincl.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
/* Register the window class,and if it fails quit the program */
if (!RegisterClassEx (&wincl))
return 0;
/* The class is registered,let's create the program*/
hwnd = CreateWindowEx (
0,/* Extended possibilites for variation */
szClassName,/* Classname */
"Bresenham",/* Title Text */
WS_OVERLAPPEDWINDOW,/* default window */
CW_USEDEFAULT,/* Windows decides the position */
CW_USEDEFAULT,/* where the window ends up on the screen */
544,/* The programs width */
375,/* and height in pixels */
HWND_DESKTOP,/* The window is a child-window to desktop */
NULL,/* No menu */
hThisInstance,/* Program Instance handler */
NULL /* No Window Creation data */
);
/* Make the window visible on the screen */
ShowWindow (hwnd,nCmdShow);
/* Run the message loop.It will run until GetMessage() returns 0 */
while (GetMessage (&msg,NULL,0,0))
{
/* Translate virtual-key messages into character messages */
TranslateMessage(&msg);
/* Send message to WindowProcedure */
DispatchMessage(&msg);
}
/* The program return-value is 0 - The value that PostQuitMessage() gave */
return msg.wParam;
}
/* This function is called by the Windows function DispatchMessage() */
LRESULT CALLBACK WindowProcedure (HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
static int x1,x2,y1,y2;
switch (message) /* handle the messages */
{
case WM_LBUTTONDOWN:
x1=LOWORD(lParam);
y1=HIWORD(lParam);
break;
case WM_LBUTTONUP:
x2=LOWORD(lParam);
y2=HIWORD(lParam);
hdc=GetDC(hwnd);
Bresenham(hdc,x1,y1,x2,y2);
ReleaseDC(hwnd,hdc);
break;
case WM_PAINT:
hdc=BeginPaint(hwnd,&ps);
EndPaint(hwnd,&ps);
break;
case WM_DESTROY:
PostQuitMessage (0); /* send a WM_QUIT to the message queue */
break;
default:/* for messages that we don't deal with */
return DefWindowProc (hwnd,message,wParam,lParam);
}
return 0;
}
void Bresenham(HDC hdc,int x1,int y1,int x2,int y2)
{
int t,x,y,dx,dy,error;
bool flag = abs(y2-y1)>abs(x2-x1);
if( flag )
{
t=x1;x1=y1;y1=t;
t=x2;x2=y2;y2=t;
}
if( x1>x2 )
{
t=x1;x1=x2;x2=t;
t=y1;y1=y2;y2=t;
}
dx=x2-x1;
dy=abs(y2-y1);
error=dx/2;
for(x=x1,y=y1;x