c语言怎么样编写一个时钟程序

c语言时钟程序代码如下：

#include<windows.h>

#include<math.h>

#define ID_TIMER 1//计时器ID

#define TWOPI (2*3.14159)

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

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR szCmdLine,int iCmdShow)

{

static TCHAR szAppName[]=TEXT("Clock")

HWND hwnd

MSG msg

WNDCLASS wndclass

wndclass.cbClsExtra=0

wndclass.cbWndExtra=0

wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH)

wndclass.hCursor=LoadCursor(NULL,IDC_ARROW)

wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION)

wndclass.hInstance=hInstance

wndclass.lpfnWndProc=WndProc

wndclass.lpszClassName=szAppName

wndclass.lpszMenuName=NULL

wndclass.style=CS_HREDRAW|CS_VREDRAW

if(!RegisterClass(&wndclass))

{

MessageBox(NULL,TEXT("This program requires Windows

T"),szAppName,MB_ICONERROR)

return 0

}

hwnd=CreateWindow(szAppName,TEXT("Analog Clock"),WS_OVERLAPPEDWINDOW,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

}

void Setsotropic(HDC hdc,int cxClient,int cyClient)

{

SetMapMode(hdc,MM_ISOTROPIC)

SetWindowExtEx(hdc,1000,1000,NULL)

SetViewportExtEx(hdc,cxClient/2,-cyClient/2,NULL)

SetViewportOrgEx(hdc,cxClient/2,cyClient/2,NULL)

}

void RotatePoint(POINT pt[],int iNum,int iAngle)

{

int i

POINT ptTemp

for(i=0i<iNumi++)

{

ptTemp.x=(int)(pt[i].x*cos(TWOPI*iAngle/360)+pt[i].y*sin(TWOPI*iAngle/360))

ptTemp.y=(int)(pt[i].y*cos(TWOPI*iAngle/360)+pt[i].x*sin(TWOPI*iAngle/360))

pt[i]=ptTemp

}

}

void DrawClock(HDC hdc)

{

int iAngle

POINT pt[3]

for(iAngle=0iAngle<360iAngle+=6)

{

pt[0].x=0

pt[0].y=900

RotatePoint(pt,1,iAngle)

pt[2].x=pt[2].y=iAngle%5?33:100

pt[0].x-=pt[2].x/2

pt[0].y-=pt[2].y/2

pt[1].x=pt[0].x+pt[2].x

pt[1].y=pt[0].y+pt[2].y

SelectObject(hdc,GetStockObject(BLACK_BRUSH))

Ellipse(hdc,pt[0].x,pt[0].y,pt[1].x,pt[1].y )

}

}

void DrawHands(HDC hdc,SYSTEMTIME *pst,BOOL fChange)

{

static POINT pt[3][5]={0,-150,100,0,0,600,-100,0,0,-150, 0,-200,50,0,0,800,-50,0,0,-200, 0,0,0,0,0,0,0,0,0,800 }

int i,iAngle[3]

POINT ptTemp[3][5]

iAngle[0]=(pst->wHour*30)%360+pst->wMinute/2

iAngle[1]=pst->wMinute*6

iAngle[2]=pst->wSecond*6

memcpy(ptTemp,pt,sizeof(pt))

for(i=fChange?0:2i<3i++)

{

RotatePoint(ptTemp[i],5,iAngle[i])

Polyline(hdc,ptTemp[i],5)

}

}

LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)

{

static int cxClient,cyClient

static SYSTEMTIME stPrevious

BOOL fChange

HDC hdc

PAINTSTRUCT ps

SYSTEMTIME st

switch(message)

{

case WM_CREATE:

SetTimer(hwnd,ID_TIMER,1000,NULL)

GetLocalTime(&st)

stPrevious=st

return 0

case WM_SIZE:

cxClient=LOWORD(lParam)

cyClient=HIWORD(lParam)

return 0

case WM_TIMER:

GetLocalTime(&st)

fChange=st.wHour!=stPrevious.wHour||st.wMinute!=stPrevious.wMinute

hdc=GetDC(hwnd)

Setsotropic(hdc,cxClient,cyClient)

SelectObject(hdc,GetStockObject(WHITE_PEN))

DrawHands(hdc,&stPrevious,fChange)

SelectObject(hdc,GetStockObject(BLACK_PEN))

DrawHands(hdc,&st,TRUE)

stPrevious=st

return 0

case WM_PAINT:

hdc=BeginPaint(hwnd,&ps)

Setsotropic(hdc,cxClient,cyClient)

DrawClock(hdc)

DrawHands(hdc,&stPrevious,TRUE)

EndPaint(hwnd,&ps)

return 0

case WM_DESTROY:

KillTimer(hwnd,ID_TIMER)

PostQuitMessage(0)

return 0

}

return DefWindowProc(hwnd,message,wParam,lParam)

}

C语言是一门通用计算机编程语言，应用广泛。C语言的设计目标是提供一种能以简易的方式编译、处理低级存储器、产生少量的机器码以及不需要任何运行环境支持便能运行的编程语言。尽管C语言提供了许多低级处理的功能，但仍然保持着良好跨平台的特性，以一个标准规格写出的C语言程序可在许多电脑平台上进行编译，甚至包含一些嵌入式处理器（单片机或称MCU）以及超级电脑等作业平台。

C语言是由UNIX的研制者丹尼斯·里奇（Dennis Ritchie）于1970年 由 肯·汤普逊（Ken Thompson）所研制出的B语言的基础上发展和完善起来的。目前，C语言编译器普遍存在于各种不同的 *** 作系统中，例如UNIX、MS-DOS、Microsoft Windows及Linux等。C语言的设计影响了许多后来的编程语言，例如C++、Objective-C、Java、C#等。

这个是简单的数码管时钟显示如果有需要，我写过比较完善的1602显示时钟.显示控制年月日等等.#include\x0d\x0asbit Begin=P2^0\x0d\x0asbit Hour=P2^1\x0d\x0asbit Mus=P2^2\x0d\x0asbit End=P2^3\x0d\x0aunsigned char code Tab[]={ 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,\x0d\x0a0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x40}\x0d\x0aunsigned char code num[]={ 0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}\x0d\x0aunsigned char Time[]={0,0,16,0,0,16,0,0}\x0d\x0aunsigned char a\x0d\x0aunsigned int x,m,th\x0d\x0avoid init()\x0d\x0a{\x0d\x0a TMOD=0x01\x0d\x0a TH0=(65535/50000)/256\x0d\x0a TL0=(65535/50000)%256\x0d\x0a EA=1\x0d\x0a ET0=1\x0d\x0a TR0=1\x0d\x0a}\x0d\x0avoid delay(unsigned int z) \x0d\x0a{ \x0d\x0a unsigned int x,y\x0d\x0a for(x=zx>0x--)\x0d\x0a for(y=110y>0y--)\x0d\x0a}\x0d\x0aunsigned char keyboard()\x0d\x0a{\x0d\x0a if(Begin==0){\x0d\x0a delay(5)\x0d\x0a if(Begin==0)\x0d\x0a return 1\x0d\x0a }\x0d\x0a if(Hour==0){\x0d\x0a delay(30)\x0d\x0a if(Hour==0)\x0d\x0a return 2\x0d\x0a }\x0d\x0a if(Mus==0)\x0d\x0a return 3\x0d\x0a if(End==0)\x0d\x0a return 4\x0d\x0a}\x0d\x0avoid display()\x0d\x0a{\x0d\x0a unsigned char i for(i=0i=20)\x0d\x0a {\x0d\x0a x++\x0d\x0a m=x\x0d\x0a th=m/3600//设置小时\x0d\x0a Time[0]=th/10\x0d\x0a Time[1]=th%10\x0d\x0a m=m%3600 Time[2]=16 th=m/60//设置分钟\x0d\x0a Time[3]=th/10\x0d\x0a Time[4]=th%10\x0d\x0a m=m%60 Time[5]=16 th=m//设置秒\x0d\x0a Time[6]=th/10\x0d\x0a Time[7]=th%10 a=0\x0d\x0a }\x0d\x0a}

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