主题：数组下标越界问题

variable:a=0,b=0;
a=ref(high,2);b=ref(low,2);
tj2:=0;
tj3:=0;

for i=1 to datacount do
begin
 q2h[i]:=ref(high,2);
 q2l[i]:=ref(low,2);

 if ref(high,2)>=ref(high,3) and ref(high,2)>=ref(high,4) and ref(high,2)>=ref(high,1) and ref(high,2)>=high and i>=5 then
 begin
  gw[i]:=q2h[i]; a=q2h[i];
  end
 else
  gw[i]:=a;
 if ref(low,2)<=ref(low,3) and ref(low,2)<=ref(low,4) and ref(low,2)<=ref(low,1) and ref(low,2)<=low and i>=5 then
 begin
 dw[i]:=q2l[i];b=q2l[i];
 end
 else
 dw[i]:=b;

end