取决于你对“种”的定义

送交者: 4ct 于 2008-04-29, 21:05:39:

回答: 我有A，B，C，D四个BOOLEAN，只许用AND和OR和扩号，可以有多少种组合？由 Enlighten 于 2008-04-29, 15:20:26:

If you are looking for the number of different functions, there are 16.

If you are looking for different expressions, you have to specify what you mean by "different combinations". For instance,
(AorB)and(AorC),
Aor(BandC)
are the same function, but do you consider them as diffrent (acceptable) combinations?

所有跟贴:

加跟贴