摘要
采用ＭＰＵ进行浮点运算时的舍入误差现象的分析，提出了一种减小舍入误差的树型分析法。利用此分析方法可以确定运算顺序，这种顺序能使表达式运算过程中的舍入误差减至最小程度，不必引入多倍字长运算，从而达到减少数据存储容量和提高执行速度的目的．
The author analyses the rounded errors in floating operation with MPU, put forward a tree analytical method for subtracting rounded errors. the operating sequence can be defined with this analytical method, on the sequence,the rounded errors produced in the process of expression operating can be reduced to a minimum, and not have to lead into multiple-word lenth operating, thus attain the goal of reducing data memory capacity and raising speed of operation.
