在cvi绘图方面遇到了些问题，新手上路，请大哥们指点下

tanyanking

要做一个绘图软件，能输入数据，然后记录，根据记录的8个数据，生成一个曲线
我的面板是

我的C文件是
#include <cvirte.h>  
#include <userint.h>
#include "king.h"
static int panelHandle;
int k;
double x[8];
double y[8];
int main (int argc, char *argv[])
{
if (InitCVIRTE (0, argv, 0) == 0)
  return -1; /* out of memory */
if ((panelHandle = LoadPanel (0, "king.uir", read)) < 0)
  return -1;
DisplayPanel (panelHandle);
RunUserInterface ();
DiscardPanel (panelHandle);
return 0;
}
int CVICALLBACK RingCallBack (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
switch (event)
{
  case EVENT_COMMIT:
  GetCtrlVal(read,read_RING,&k);
     SetCtrlVal(read,read_RING,k);
  SetCtrlVal(read,read_X,x[k]);
  SetCtrlVal(read,read_Y,y[k]);
   break;
}
return 0;
}
int CVICALLBACK GetCallBack (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
switch (event)
{
  case EVENT_COMMIT:
  GetCtrlVal(read,read_RING,&k);
     SetCtrlVal(read,read_RING,k);
  GetCtrlVal(read,read_X,&x[k]);
  GetCtrlVal(read,read_Y,&y[k]);
   break;
}
return 0;
}
int CVICALLBACK QuitCallBack (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
switch (event)
{
  case EVENT_COMMIT:
   QuitUserInterface (0);
   break;
}
return 0;
}
int CVICALLBACK DrawCallBack (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
switch (event)
{
  case EVENT_COMMIT:
  
  PlotXY(read,read_DRAW,x[8],y[8],2000,VAL_DOUBLE,VAL_DOUBLE,VAL_THIN_LINE,VAL_EMPTY_SQUARE,VAL_SOLID,1,VAL_RED);
   break;
}
return 0;
}


但总是出现2个错误71, 35   Type error in argument 3 to `PlotXY'; found 'double' expected 'pointer to void'.
  71, 40   Type error in argument 4 to `PlotXY'; found 'double' expected 'pointer to void'

有人给我说是把x[8],y[8].改为，x，y
那我之前的数据怎么办呢？怎么读出来？
小弟在这纠结了1个星期了，请高手给讲讲，新手上路，希望大哥们讲的详细点~谢谢了~