y[n]=0.5x[n]+0.3x[n-1]+0.2x[n-2],
where y and x are both 1-D arrays with
1000 double precision floating elements and
x[-2]=x[-1]=0.
What is the maximum difference between the computed y[n] and
it's real value result
使用C设计解问题
请问板上前备这题该如何解析，不是很清楚它的题意。

"double precision floating elements"

抱歉 少打了^point

题目问理论值和实际计算值的最大误差，和浮点数误差有关递回关系式离散数学课本有教公式解，和计算解比较一下即可

感谢g大