请问以下程序中怎样将r的值赋到u(r),v(r),w(r)中<BR>h=20;<BR>a=100/h;<BR>for i=0:h:100<BR> for j=0:h:100<BR> for k=0:h:100<BR> r=i/h+j/h*(a+1)+k/h*(a+1)^2;<BR> u(r)=i<BR> v(r)=j<BR> w(r)=k<BR> end<BR> end<BR>end<BR><BR>运行时系统提示:??? Subscript indices must either be real positive integers or logicals.<BR><BR>请高手指点,谢谢!<BR><BR>