相关疑难解决方法(0)

我可以处理另一个,而不是干净的方式,但希望能够利用以下内容:

type Prefix is (Yocto, Zepto, Atto, Femto, Pico, Nano,
    Micro, Milli, Centi, Deci, None, Deca, Hecto, Kilo,
    Mega, Giga, Tera, Peta, Exa, Zetta, Yotta);
for Prefix use (
    Yocto => -24,
    Zepto => -21,
    Atto => -18,
    Femto => -15,
    Pico => -12,
    Nano => -9,
    Micro => -6,
    Milli => -3,
    Centi => -2,
    Deci => -1,
    None => 0,
    Deca => 1,
    Hecto => 2,
    Kilo => 3,
    Mega => 6,
    Giga => 9,
    Tera => 12, …