❶ 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=0;i<iNum;i++)

{

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=0;iAngle<360;iAngle+=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?0:2;i<3;i++)

{

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);

}

❷ 怎么用C语言编程数字时钟

1、以下例程实现时钟的实时显示基本要求： 1） 自行设计界面，模拟表盘式时钟。要求界面美观，清晰。2）数字同步显示时间信息。


2、例程：

#include<graphics.h>
#include<math.h>
#include<dos.h>
#definePI3.1415926
//屏幕中心的坐标（640X480模式下）
#definemid_x320
#definemid_y240
intmain()
{intgraphdriver=DETECT,graphmode;
intend_x,end_y;
structtimecurtime;
floatth_hour,th_min,th_sec;
initgraph(&graphdriver,&graphmode,"C:\TC2");//初始化VGA屏幕模式
setbkcolor(BLACK);//使用黑色的背景色
while(!kbhit(0))//若有键盘输入，则跳出，即是结束程序
{setcolor(GREEN);//把画笔设为绿色
circle(mid_x,mid_y,180);//钟的外圆
circle(mid_x,mid_y,150);//钟的内圆
circle(mid_x,mid_y,1);//画出钟的圆心
gettime(&curtime);//取得系统当前时间
th_sec=(float)curtime.ti_sec*0.1047197551;//把秒针的角度化为弧度，为以后绘制时方便，下同
th_min=(float)curtime.ti_min*0.1047197551+th_sec/60.0;//分针的弧度
th_hour=(float)curtime.ti_hour*0.5235987755+th_min/12.0;//时度的弧度，注意整时是12等分的，所时乘的是3.14/180*5
//计算出时针的尾的坐标（时针长70）
end_x=mid_x+70*sin(th_hour);
end_y=mid_y-70*cos(th_hour);
setcolor(RED);
line(mid_x,mid_y,end_x,end_y);//用红色线画出时针
//计算出分针坐标(分针长110）
end_x=mid_x+110*sin(th_min);
end_y=mid_y-110*cos(th_min);
setcolor(RED);
line(mid_x,mid_y,end_x,end_y);//用红色画出分针
end_x=mid_x+140*sin(th_sec);
end_y=mid_y-140*cos(th_sec);
setcolor(RED);
line(mid_x,mid_y,end_x,end_y);//同上，画出秒针，长为140
//画出钟盘上的刻度，刻度长20
line(140,240,160,240);//9点对应的大刻度
line(320,60,320,80);//12点对应的大刻度
line(500,240,480,240);//3点的刻度
line(320,420,320,400);//6点的刻度
line(410,395.7,400,378.4);//5点
line(475.7,330,458.4,320);//4点
line(475.7,150,458.4,160);//2点
line(410,84.3,400,101.6);//1点
line(230,84.3,240,101.6);//11点
line(164.3,150,181.6,160);//10点
line(164.3,330,181.6,320);//8点
line(230,395.7,240,378.4);//7点
sleep(BLUE);//这里应该是打错，停止一秒，应为sleep(1000)
cleardevice();//清除屏幕上的显示
}
closegraph();//关闭VGA屏幕，即返回文本方式
return0;
}