【正文】
對(duì)于計(jì)算出來(lái)的實(shí)數(shù),即使真的相等,但對(duì)計(jì)算機(jī)來(lái)說,其往往不是絕對(duì)相等( ).因此判斷其相等就需要采用差值方法(equal expr1 expr2 [FUZZ])其中任選項(xiàng)FUZZ指定表達(dá)式EXPR1 EXPR2 ,則判斷結(jié)果為真,反之為假.(if (equal a b )(prompt These numbers are equal)(prompt These numbers are not equal