学步园

先按照自己的思路写了一个程序，写得比较匆忙，难免有不足之处，希望大家批评指正。

#include <WINDOWS.H>
#include <MATH.H>
#define RCLOCK  150
#define RHOUR   8
#define RMINUTE 3
#define RCENTER 3
#define RMHAND  30
#define RHHAND  40
#define HTHETA  22
#define MTHETA  15
#define PI      3.1415926
#define TIMEID  1


void ShowSecond(WORD s,HDC hdc);
void ShowMinute(WORD m,HDC hdc);
void ShowHour(WORD h,WORD m,HDC hdc);

LRESULT CALLBACK MainWndProc(
							 HWND hwnd,      // handle to window
							 UINT uMsg,      // message identifier
							 WPARAM wParam,  // first message parameter
							 LPARAM lParam   // second message parameter
							 );


int WINAPI WinMain(
				   HINSTANCE hInstance,      // handle to current instance
				   HINSTANCE hPrevInstance,  // handle to previous instance
				   LPSTR lpCmdLine,          // command line
				   int nCmdShow              // show state
				   )
{
	TCHAR szAppName[]=TEXT("ACLOCK 1");

	WNDCLASS wndcls;

	wndcls.cbClsExtra=0;
	wndcls.cbWndExtra=0;
	wndcls.hCursor=LoadCursor(0,IDC_ARROW);
	wndcls.hIcon=LoadIcon(0,IDI_APPLICATION);
	wndcls.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
	wndcls.hInstance=hInstance;
	wndcls.lpfnWndProc=MainWndProc;
	wndcls.lpszClassName=szAppName;
	wndcls.lpszMenuName=NULL;
	wndcls.style=CS_VREDRAW|CS_HREDRAW;
	
	RegisterClass(&wndcls);

	HWND hwnd;

	hwnd=CreateWindow(szAppName,TEXT("模拟时钟"),WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,hInstance,NULL);

	ShowWindow(hwnd,nCmdShow);
	UpdateWindow(hwnd);

	MSG msg;

	while (GetMessage(&msg,0,0,0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return 0;
}

LRESULT CALLBACK MainWndProc(
							HWND hwnd,      // handle to window
							UINT uMsg,      // message identifier
							WPARAM wParam,  // first message parameter
							LPARAM lParam   // second message parameter
							)
{
	PAINTSTRUCT ps;
	HDC hdc;
	SYSTEMTIME st;
	int i,rx,ry;
	static int cxClient,cyClient;
	HBRUSH brush,oldBrush;
	HPEN pen,oldPen;
	switch (uMsg)
	{
	case WM_CREATE:
		SetTimer(hwnd,1,1000,NULL);
		return 0;
	case WM_SIZE:
		cxClient=LOWORD(lParam);
		cyClient=HIWORD(lParam);
		return 0;
	case WM_TIMER:
		InvalidateRect(hwnd,NULL,TRUE);
		return 0;
	case WM_PAINT:
		hdc=BeginPaint(hwnd,&ps);
		
		SetMapMode(hdc,MM_ISOTROPIC);

		SetWindowExtEx(hdc,330,-330,NULL);
		SetViewportExtEx(hdc,cxClient,cyClient,NULL);
		
		SetViewportOrgEx(hdc,cxClient/2,cyClient/2,NULL);
		
		brush=CreateSolidBrush(RGB(0,0,0));
		oldBrush=(HBRUSH)SelectObject(hdc,brush);

		Ellipse(hdc,RCENTER,RCENTER,-RCENTER,-RCENTER);
		SelectObject(hdc,oldBrush);
		for (i=0;i<60;i++)
		{
			rx=RCLOCK*cos(i*6*PI/180);
			ry=RCLOCK*sin(i*6*PI/180);
			brush=CreateSolidBrush(RGB(0,0,0));
			oldBrush=(HBRUSH)SelectObject(hdc,brush);
			if (0==(i%5))
			{			
				Ellipse(hdc,rx-RHOUR,ry-RHOUR,rx+RHOUR,ry+RHOUR);
			}
			else
			{
			
				Ellipse(hdc,rx-RMINUTE,ry-RMINUTE,rx+RMINUTE,ry+RMINUTE);
			}

		}
		SelectObject(hdc,oldBrush);
		
		GetLocalTime(&st);
		ShowSecond(st.wSecond,hdc);
		ShowMinute(st.wMinute,hdc);
		ShowHour(st.wHour,st.wMinute,hdc);

		EndPaint(hwnd,&ps);
		return 0;
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
	}
	return DefWindowProc(hwnd,uMsg,wParam,lParam);
}



void ShowSecond(WORD s,HDC hdc)
{
	int rx,ry;
	rx=RCLOCK*cos((90-s*6)*PI/180);
	ry=RCLOCK*sin((90-s*6)*PI/180);
	if (rx>0)
	{
		rx-=15;
	}
	else
	{
		rx+=15;
	}
	if (ry>0)
	{
		ry-=15;
	}
	else
	{
		ry+=15;
	}

	MoveToEx(hdc,0,0,NULL);
	LineTo(hdc,rx,ry);



}

void ShowMinute(WORD m,HDC hdc)
{
	POINT pt[5];
	pt[0].x=0;
	pt[0].y=0;
	pt[4].x=0;
	pt[4].y=0;
	
	pt[2].x=RCLOCK*cos((90-m*6)*PI/180);
	pt[2].y=RCLOCK*sin((90-m*6)*PI/180);
	
	if (pt[2].x>0)
	{
		pt[2].x-=10;
	}
	else
	{
		pt[2].x+=10;
	}
	if (pt[2].y>0)
	{
		pt[2].y-=10;
	}
	else
	{
		pt[2].y+=10;
	}
	
	pt[1].x=RHHAND*cos(((90-m*6)+MTHETA)*PI/180);
	pt[1].y=RHHAND*sin(((90-m*6)+MTHETA)*PI/180);
	pt[3].x=RHHAND*cos(((90-m*6)-MTHETA)*PI/180);
	pt[3].y=RHHAND*sin(((90-m*6)-MTHETA)*PI/180);
	Polyline(hdc,pt,5);
	
}

void ShowHour(WORD h,WORD m,HDC hdc)
{
	POINT pt[5];
	if (h>12)
	{
		h-=12;
	}
	pt[0].x=0;
	pt[0].y=0;
	pt[4].x=0;
	pt[4].y=0;

	pt[2].x=RCLOCK*cos((90-m*0.5-30*h)*PI/180);
	pt[2].y=RCLOCK*sin((90-m*0.5-30*h)*PI/180);

	if (pt[2].x>0)
	{
		pt[2].x-=20;
	}
	else
	{
		pt[2].x+=20;
	}
	if (pt[2].y>0)
	{
		pt[2].y-=20;
	}
	else
	{
		pt[2].y+=20;
	}
	
	pt[1].x=RHHAND*cos(((90-m*0.5-30*h)+HTHETA)*PI/180);
	pt[1].y=RHHAND*sin(((90-m*0.5-30*h)+HTHETA)*PI/180);
	pt[3].x=RHHAND*cos(((90-m*0.5-30*h)-HTHETA)*PI/180);
	pt[3].y=RHHAND*sin(((90-m*0.5-30*h)-HTHETA)*PI/180);
	Polyline(hdc,pt,5);
	
}

<span style="font-family: Arial, Helvetica, sans-serif;">也懒得加注释了，主要是为了以后回过头来看一看。与作者写的思路上的差距还是比较大的，效率上差距好像更大,哈哈，有待于提高啊！</span>