改进型漂亮时钟

/*看了上面以为兄弟的钟表觉得比较简陋，且屏幕刷新闪烁严重，鼓作了一些改进，还请各位大侠指教*/

/*本程序已在TC3下调试过*/

#include<graphics.h>
#include<math.h>
#include<dos.h>
#include<conio.h>
#include<stdio.h>

#define PI 3.1415926
#define x0 320    /*定义钟表中心坐标*/
#define y0 240
#define r  200

void DrawClock()
{
  setcolor(4);
  circle(x0,y0,210);
  setcolor(9);
  circle(x0,y0,215);
  setcolor(5);
  setfillstyle(1,5);
  circle(x0,y0,10);
  floodfill(x0,y0,5);    /*画中间小圆并填充*/
}

void DrawHand(int x,int y,float th,int l,int color)
{
  int x1,y1;
  x1=x+l*sin(th);
  y1=y-l*cos(th);
  setcolor(color);
  line(x,y,x1,y1);
}
void main()
{int i;
 struct time curtime;
 float th_hour,th_min,th_sec;
 float th_hour_l,th_min_l,th_sec_l;

 int graphdriver,graphmode;
 graphdriver=DETECT;
 initgraph(&graphdriver,&graphmode,"c:\\tc3\\7\\BGI ");//目录根据具体情况需做点改动
 cleardevice();
 
 char n[12][3]={"3","2","1","12","11","10","9","8","7","6","5","4"};
 while(! kbhit())
   {
    DrawClock();
    setcolor(2);
    settextstyle(4,0,5);
    for(i=0;i<12;i++)
    {  if(i!=3)
       {outtextxy(x0+(r-14)*cos(PI/6*i)-10,y0-(r-14)*sin(PI/6*i)-26,n[i]);
        line(x0+200*cos(PI/6*i),y0-200*sin(PI/6*i),
            x0+210*cos(PI/6*i),y0-210*sin(PI/6*i));
       }
       else
       {outtextxy(x0+(r-14)*cos(PI/6*i)-20,y0-(r-14)*sin(PI/6*i)-26,n[i]);
        line(x0+200*cos(PI/6*i),y0-200*sin(PI/6*i),
            x0+210*cos(PI/6*i),y0-210*sin(PI/6*i));
       }
    }

   gettime(&curtime);   /*得到当前系统时间*/

   gotoxy(36,20);      /*定位输出位置*/

    if((float)curtime.ti_hour<=12)         /*午前的处理*/
       {
        printf("AM ");
        if((float)curtime.ti_hour<10) printf("0");   /*十点之前在小时数前加零*/
        printf("%.0f:",(float)curtime.ti_hour);
       }
    if((float)curtime.ti_hour>12)         /*午后的处理*/
       {printf("PM ");
        if((float)curtime.ti_hour-12<10) printf("0");
        printf("%.0f:",(float)curtime.ti_hour-12);
       }
     if((float)curtime.ti_min<10) printf("0");
     printf("%.0f:",(float)curtime.ti_min);
     if((float)curtime.ti_sec<10) printf("0");
     printf("%.0f",(float)curtime.ti_sec);

    /*以下三行计算表针转动角度，以竖直向上为起点，顺时针为正*/
    th_sec_l=th_sec;
    th_min_l=th_min;
    th_hour_l=th_hour;
   th_sec=(float)curtime.ti_sec*0.1047197551;                  /*2π/60=0.1047197551*/
   th_min=(float)curtime.ti_min*0.1047197551+th_sec/60.0;
   th_hour=(float)curtime.ti_hour*0.523598775+th_min/12.0;      /*  2π/12=0.5235987755   */
   DrawHand(x0,y0,th_hour_l,90,0);     /*画时针*/
   DrawHand(x0,y0,th_min_l,120,0);    /*分针*/
   DrawHand(x0,y0,th_sec_l,180,0);     /*秒针*/
   DrawHand(x0,y0,th_hour,90,2);     
   DrawHand(x0,y0,th_min,120,3);
   DrawHand(x0,y0,th_sec,180,12);

   sleep(1);      /*延时一秒后刷新*/
   }

 closegraph();
}