Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
@150930 这样计算，虽然语句少，但结果会有很大的误差。我觉得应该按照分数的形式计算，最后再将分数形式的结果转变为小数，或者就返回分数形式的结果。
@fzxs8 高效简洁
