c 语言 可以做出非常漂亮的界面。理论上界面只不过是计算机对每一个像素的控制而已。c 完全有这种能力，只不过较复杂。
这个例子看起来就很漂亮嘛。
#include<math.h>
#include<dos.h>
#include<graphics.h>
#define CENTERX 320 /*表盘中心位置*/
#define CENTERY 175
#define CLICK 100 /*喀嗒声频率*/
#define CLICKDELAY 30 /*喀嗒声延时*/
#define HEBEEP 10000 /*高声频率*/
#define LOWBEEP 500 /*低声频率*/
#define BEEPDELAY 200 /*报时声延时*/
/*表盘刻度形状*/
int Mrk_1[8]={-5,-160,5,-160,5,-130,-5,-130, };
int Mrk_2[8]={-5,-160,5,-160,2,-130,-2-130, };
/*时针形状*/
int HourHand[8]={-3,-100,3,-120,4, 10,-4,10};
/*分针形状*/
int MiHand[8]={-3,-120,3,-120,4, 10,-4,10};
/*秒针形状*/
int SecHand[8]={-2,-150,2,-150,3, 10,-3,10};
/*发出喀嗒声*/
void Click()
{
sound(CLICK);
delay(CLICKDELAY);
nosound();
}
/*高声报时*/
void HighBeep()
{
sound(HEBEEP);
delay(BEEPDELAY);
nosound;
}
/*低声报时*/
void LowBeep()
{
sound(LOWBEEP);
}
/*按任意角度画多边形*/
void DrawPoly(int *data,int angle,int color)
{
int usedata[8];
float sinang,cosang;
int i;
sinang=sin((float)angle/180*3.14);
cosang=cos((float)angle/180*3.14);
for(i=0;i<8;i+=2)
{
usedata[i] =CENTERX+ cosang*data[i]-sinang*data[i+1]+.5;
usedata[i+1]=CENTERY+sinang*data[i]+cosang*data[i+1]+.5;
}
setfillstyle(SOLID_FILL,color);
fillpoly(4,usedata);
}
/*画表盘*/
void DrawClock(struct time *cutime)
{
int ang;
float hourrate,minrate,secrate;
setbkcolor(BLUE);
cleardevice();
setcolor(WHITE);
/* 画刻度*/
for(ang=0;ang<360;ang+=90)
{
DrawPoly(Mrk_1,ang,WHITE);
DrawPoly(Mrk_2,ang+30,WHITE);
DrawPoly(Mrk_2,ang+60,WHITE);
}
secrate=(float)cutime->ti_sec/60;
minrate=((float)cutime->ti_min+secrate)/60;
hourrate=(((float)cutime->ti_hour/12)+minrate)/12;
ang=hourrate*360;
DrawPoly(HourHand,ang,YELLOW);/*画时针*/
ang=minrate*360;
DrawPoly(MiHand,ang, GREEN);/*画分针*/
ang=secrate*360;
DrawPoly(SecHand,ang, RED);/*画秒针*/
}
main()
{
int gdriver=EGA,
gmode=EGAHI;
int curpage;
struct time curtime ,newtime ;
initgraph(&gdriver,&gmode,"c:\\tc");
setbkcolor(BLUE);
cleardevice();
gettime(&curtime);
curpage=0;
DrawClock(&curtime);
while(1)
{
if(kbhit())
break; /*按任意键退出*/
gettime(&newtime); /*检测系统时间*/
if(newtime.ti_sec!=curtime.ti_sec)/*每1秒更新一次时间*/
{
if(curpage==0)
curpage=1;
else
curpage=0;
curtime=newtime;
/*设置绘图页*/
setactivepage(curpage);
/*在图页上画表盘*/
DrawClock(&curtime);
/*设置绘图页为当前可见页*/
setvisualpage(curpage);
/*0分0秒高声报时*/
if(newtime.ti_min==0&&newtime.ti_sec==0)
HighBeep();
/* 59分55至秒时低声报时*/
else if(newtime.ti_min==59&&
newtime.ti_sec<=59)
LowBeep();/*其他时间只发出喀嗒声*/
else
Click();
}
}
closegraph();
}
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