loop有吧0 m+ x# ^+ N/ [ w& F+ [1 d
loop8 [! \9 X6 v" l; n w
loop [ commands ] _: l! M0 H) I! V7 }Runs the list of commands forever, or until the current procedure exits through use of the stop - k. U& z4 w0 hcommand or the report command.* R9 S9 A. l" A; T" A
Note: In most circumstances, you should use a forever button in order to repeat something forever. ( U) s6 R% P, c# I" ^8 r; ~The advantage of using a forever button is that the user can click the button to stop the loop0 v6 q" F" o; k! n8 `4 b
! U9 F* x! U) a& Z' y（version 3.1.3） ' E3 d( i d3 E* @5 D) b. S# N不过好像不大推荐
globals[p ml ]7 Q5 q+ D. P3 v5 \/ B
to setup 7 a' Q* _! S9 {set ml n-values 200 [ifelse-value (random-float 1 < 0.3 ) [0] [1] ]) ^& h1 w# y s* N- ~/ x" x! T, ]
set ml filter [ ? = 1] ml - e0 @: t; t- z+ n* U. Bset p 1, t3 J6 I$ \, P2 g% p" J6 }
repeat length ml [ set p p + 1]! n" q& l/ U' }4 V/ w
if p > 100[stop]8 o- F7 r3 u: F8 x2 T; w
show p * N4 d' T W& Y' I0 b/ E$ uend * | Y; Z* [$ C# g, W- T0 K! S& L( c L
像这种简单的迭代加和还可以，但如果牵涉到多变量的迭代加和，不知道该怎么表达。还有，如果想取出运行中每个阶段的值而不仅仅是终值，该怎么取呢？( w$ ?2 \$ A% \2 _0 y
发表于 2008-4-10 17:04:15
楼主
什么都不说了，都在程序里了。