#
\"stdlib.h\"#
\"conio.h\"#
\"stdio.h\"#
\"graphics.h\"#
\"math.h\"#
\"dos.h\"#
BB 3.14159/180 void InitGra(void);void SysTime(
x, y, r); Clock( x, y, r);void ClockPict(
x, y, r); 
(void){
x, y, r; /* 定义表盘
中心及半径 */x = 310;
y = 240;
r = 42;
InitGra
;SysTime(x, y, r);
closegraph
;
(0);}
void InitGra(void)
{
GraphDrive = DETECT, GraphMode;registerbgidriver(EGAVGA_driver);
initgraph(&GraphDrive, &GraphMode, \"\");
}
void SysTime(
x, y, r) /* 表盘中心坐标, 半径 */{
ClockPict(x, y, r);
while ((Clock(x, y, r) != 1) && (! kbhit
)); /* 钟表运行直到按键为止 */}
Clock( x, y, r) /* 表盘中心, 表盘半径 */{
float hr, mt, sd, dh, dm, ds, ds0;
i, Fst = 1;union REGS in, out;
color(0); fillstyle(1, 0);pieslice(x, y, 0, 360, r-11);
in.h.ah = 0x2c;
86(0x21, &in, &out);hr = out.h.ch; /* 时 */
mt = out.h.cl; /* 分 */
sd = out.h.dh; /* 秒 */
(hr > 12) hr = hr-12;hr = hr+mt/60;
dh = 270+30*hr;
(dh > 360) dh = dh-360; dh = dh*BB;dm = 270+6*mt;
(dm > 360) dm = dm-360; dm = dm*BB;ds = 270+6*sd;
(ds > 360) ds = ds-360; ds = ds*BB;color(15); linestyle(0, 0, 3);line(x, y, x+(r-20)*cos(dh), y+(r-20)*sin(dh)); /* 画时针 */
linestyle(0,0,1);line(x, y, x+(r-15)*cos(dm), y+(r-15)*sin(dm)); /* 画分针 */
writemode(XOR_PUT);for (i = 0; i < 300; i
){
in.h.ah = 0x2c; /* 循环内执行秒针
走动 */86(0x21, &in, &out);sd = out.h.dh;
ds = 270+6*sd;
(ds > 360) ds = ds-360;ds = ds*BB;
(Fst) ds0 = ds;linestyle(0, 0, 1); color(12); (!Fst) line(x,y,x+(r-12)*cos(ds0),y+(r-12)*sin(ds0)); /* 擦去原秒针*/line(x, y, x+(r-12)*cos(ds), y+(r-12)*sin(ds)); /* 重画秒针 */
ds0 = ds; Fst = 0;
(kbhit) (1); /* 如果有按键, 返回 */
delay(100);}
}
void ClockPict(
x, y, r) /* 画表盘 */{
float af;
i, Dlt;writemode(COPY_PUT); linestyle(0,0,1);color(0); fillstyle(1,0);pieslice(x, y, 0, 360, r+2);
color(14);circle(x, y, r);
line(x+r+5, y-2, x+r+10, y-2);
line(x+r+5, y+2, x+r+10, y+2);
linestyle(0,0,3);rectangle(x+r+5, y-6, x+r+10, y+6);
circle(x, y, r+5);
for (i = 0; i < 360; i
30) /* 画表时刻刻度 */{
af = i*BB;
(i
0 || i90 || i180 || i270) Dlt = 8; /* 3,6,9,12点刻度稍长*/ Dlt = 5;line(x+(r-Dlt)*cos(af), y+(r-Dlt)*sin(af), x+r*cos(af), y+r*sin(af));
}
}
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