程序代码如下：
#include<iostream>
#include<windows.h>
using namespace std
class Clock{
public:
Clock(short h=0,short m=0,short s=0):h(h),m(m),s(s){
}
void displayTime()
private:
short h
short m
short s
}void Clock::displayTime(){
while(true){
cout<<h<<':'<<m<<':'<<s<<" "
Sleep(1000)
cout<<'\r'
if(!(s=++s%60))
if(!(m=++m%60))
h=++h%24
}
} int main()
{
Clock A(23,59,55)
A.displayTime()
return 0
}
扩展资料：
定义一个日期类，包括年、月、日三个成员变量，显示日期的方法如下数乱：裂毕余肆滚
publicclassDemo{
publicstaticvoidmain(String[]args){
Datedate1=newDate(1994,5,22)
date1.showInfo()
Datedate2=newDate()
date2.year=1995
date2.month=6
date2.day=29
date2.showInfo()
}
}
//日期类：
publicclassDate{
intyear
intmonth
intday
//构造方法
publicDate(intyear,intmonth,intday){
this.year=year
this.month=month
this.day=day
}
publicDate(){
}
publicvoidshowInfo(){
System.out.println(year+"年"+month+"月"+day+"日")
}
}
具体代码如下：#include<graphics.h>
#include<math.h>
#include<dos.h>
#define PI 3.1415926
//屏幕中心的坐标（640X480模式下）
#define mid_x 320
#define mid_y 240
int main()
{ int graphdriver=DETECT,graphmode
int end_x,end_y
struct time curtime
float th_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)//蠢蠢槐钟的外圆
circle(mid_x,mid_y,150)//钟的内圆
circle(mid_x,mid_y,1)//画出钟的圆心
gettime(&curtime)/带友/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，档悄应为sleep(1000)
cleardevice()//清除屏幕上的显示
}
closegraph()//关闭VGA屏幕，即返回文本方式
return 0
}
这个是文字时钟代码:<script>
var dayarray=new Array("Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday")
var montharray=new Array("January","February"毕弊,"March","April","May","June"隐数纯,"July","August","灶咐September","October","November","December")
function getthedate(){
var mydate=new Date()
var year=mydate.getYear()
if (year <1000)
year+=1900
var day=mydate.getDay()
var month=mydate.getMonth()
var daym=mydate.getDate()
if (daym<10)
daym="0"+daym
var hours=mydate.getHours()
var minutes=mydate.getMinutes()
var seconds=mydate.getSeconds()
var dn="AM"
if (hours>=12)
dn="PM"
if (hours>12){
hours=hours-12
}
if (hours==0)
hours=12
if (minutes<=9)
minutes="0"+minutes
if (seconds<=9)
seconds="0"+seconds
//change font size here
var cdate="<small><font color='000000' face='Arial'><b>"+dayarray[day]+", "+montharray[month]+" "+daym+", "+year+" "+hours+":"+minutes+":"+seconds+" "+dn
+"</b></font></small>"
if (document.all)
document.all.clock.innerHTML=cdate
else
document.write(cdate)
}
if (!document.all)
getthedate()
function goforit(){
if (document.all)
setInterval("getthedate()",1000)
}
</script>
<body onload="goforit()">
<span id="clock"></span>
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