#include "stdlib.h"
#include "conio.h"
#include "stdio.h"
#include "graphics.h"
#include "math.h"
#include "dos.h"
#define BB 3.14159/180

void InitGra(void);
void SysTime(int x, int y, int r);
int Clock(int x, int y, int r);
void ClockPict(int x, int y, int r);

int main(void)
{ int x, y, r; /* 定义表盘的中心及半径 */
x = 310;
y = 240;
r = 42;
InitGra();
SysTime(x, y, r);
closegraph();
return(0);
}

void InitGra(void)
{ int gdrive = DETECT, gmode;

initgraph(&gdrive, &gmode, "");
}

void SysTime(int x, int y, int 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 */
}

int Clock(int x, int y, int r) /* 表盘中心, 表盘半径 */
{ float hr, mt, sd, dh, dm, ds, ds0;
int i, Fst = 1;
union REGS in, out;
setcolor(0); setfillstyle(1, 0);
pieslice(x, y, 0, 360, r-11);
in.h.ah = 0x2c;
int86(0x21, &in, &out);
hr = out.h.ch; /* 时 */
mt = out.h.cl; /* 分 */
sd = out.h.dh; /* 秒 */
if (hr > 12) hr = hr-12;
hr = hr+mt/60;
dh = 270+30*hr;if (dh > 360) dh = dh-360; dh = dh*BB;
dm = 270+6*mt; if (dm > 360) dm = dm-360; dm = dm*BB;
ds = 270+6*sd; if (ds > 360) ds = ds-360; ds = ds*BB;
setcolor(15); setlinestyle(0, 0, 3);
line(x, y, x+(r-20)*cos(dh), y+(r-20)*sin(dh)); /* 画时针 */
setlinestyle(0,0,1);
line(x, y, x+(r-15)*cos(dm), y+(r-15)*sin(dm)); /* 画分针 */
setwritemode(XOR_PUT);
for (i = 0; i < 300; i++)
{
in.h.ah = 0x2c; /* 循环内执行秒针的走动 */
int86(0x21, &in, &out);
sd = out.h.dh;
ds = 270+6*sd;
if (ds > 360) ds = ds-360;
ds = ds*BB;
if (Fst) ds0 = ds;
setlinestyle(0, 0, 1); setcolor(12);
if (!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;
if (kbhit()) return (1); /* 如果有按键, 返回 */
else delay(100);
}
}

void ClockPict(int x, int y, int r)
{ /* 画表盘 */
{ float af;
int i, Dlt;
setwritemode(COPY_PUT); setlinestyle(0,0,1);
setcolor(0); setfillstyle(1,0);
pieslice(x, y, 0, 360, r+2);
setcolor(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);
setlinestyle(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) /* 画表的时刻刻度 */
{
af = i*BB;
if (i==0 || i==90 || i==180 || i==270) Dlt = 8; /* 3,6,9,12点刻度稍长*/
else Dlt = 5;
line(x+(r-Dlt)*cos(af), y+(r-Dlt)*sin(af), x+r*cos(af), y+r*sin(af));
}
}

getch();

}
这本来是个时钟程序，怎么在wintc下运行不来呢，我要设置什么东西吗？