c语言转动的时钟的问题

答案：以下是我做课程设计时做的，时隔久远，原时钟是正着走的，后来老师要求自己做点更改，我就改成倒着走了，但现在改不回来了，都忘了，你自己研究吧
 #include<math.h>
 #include<dos.h>
 #include<graphics.h>
 #define CENTERX 320
 #define CENTERY 175
 #define CLICK 100
 #define CLICKDELAY 30
 #define HEBEEP 10000
 #define LOWBEEP 500
 #define BEEPDELAY 200
 int Mrk_1[8]={-5,-160,5,-160,5,-130,-5,-130, };
 int Mrk_2[8]={-5,-160,5-160,2,-130,-2,-130, };
 int HourHand[8]={-3,-100,3,-120,4, 10,-4,10};
 int MiHand[8]={-3,-120,3,-120,4, 10,-4,10};
 int SecHand[8]={-2,-150,2,-150,3, 10,-3,10};
 void Click()
 {sound(CLICK);
  delay(CLICKDELAY);
  nosound();
 }
 void HighBeep()
 {sound(HEBEEP);
  delay(BEEPDELAY);
  nosound;
 }
 void LowBeep()
 {sound(LOWBEEP);
 }
 void DrawPoly(int *data,int angle,int color)
 {int usedata[8];
  float sinang,cosang;
  int i;
  sinang=cos((float)angle/180*3.14);
  cosang=sin((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);
 }
 void DrawClock(struct time *cutime)
 {int ang;
  float hourrate,minrate,secrate;
  setbkcolor(BLUE);
  cleardevice();
  setcolor(WHITE);
  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;
   gettime(&newtime);
   if(newtime.ti_sec!=curtime.ti_sec)
   {if(curpage==0)
    curpage=1;
    else
    curpage=0;
    curtime=newtime;
    setactivepage(curpage);
    DrawClock(&curtime);
    setvisualpage(curpage);
    if(newtime.ti_min==0&&newtime.ti_sec==0)
    HighBeep();
    else if(newtime.ti_min==59&&newtime.ti_sec<=59) LowBeep();
  
    else Click();
   }
 }
  closegraph();
 }

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