我编的程序如下turtles-own [energy]
4 _9 @- b: A+ B4 |" P* m' p0 p& h Fto setup
6 R1 p; X/ L& ]2 l _% n- @ clear-all
& A5 y$ U! }3 g8 X: Z1 s2 Q; s) _# s setup-patches
- b1 @# Q" u0 O" [/ q" ? create-turtles 100: h2 F" E* @3 a% D1 V
do-plots! t5 w+ A, y: \0 e% q- O
ask turtles [ setxy random-xcor random-ycor ] t3 U5 _* }; ^4 J4 C6 Q2 \* D
end
" p( l; P" U/ d1 i0 v# }to go7 Y+ I2 s- f8 R& M/ W2 Y* L1 O
move-turtles0 T4 S$ i- H/ C, Y( k8 h/ ~& b
eat-grass
2 z2 H" E: X( Z' B8 R3 U( v reproduce
* q! Y- H% R6 A5 q check-death
5 {; h1 i' h$ }7 P' n; [ regrow-grass/ A$ a/ y$ h! K0 y" G4 ^# E
do-plots/ |+ m+ D/ U( m5 e% \
end
9 w9 B# B6 f% B! ? W+ L- tto move-turtles0 r2 X% v& s# Y: i, g+ ~0 ^. w4 f
ask turtles [
8 e4 x2 b+ N. ]8 D4 H right random 360
, T2 r4 W( C# O3 i forward 1
) G& F/ e+ U1 h* ]3 B" M5 j set energy energy - 1
" S. C7 @( u; Q5 { ?- J ]
0 g2 Y" O5 v9 P% Q. x' Tend) k- F/ {1 _. b/ p! m _
to setup-patches
y5 `, f5 t( ^, o ask patches [ set pcolor green ]# ?8 b4 ]1 ~/ C# Y, m6 F) T
end1 w& _ {% ]' ^# X
to setup-turtles
; R$ q. \: V- F0 c9 f# F create-turtles 100" I& K0 O2 ]2 ?: o& ]
ask turtles [ setxy random-xcor random-ycor ]
# r7 N7 I! I/ j2 ^- {end
Y9 r$ d) m& T/ T: nto eat-grass
: B# m1 p; \1 ~1 K' _( X& H ask turtles [* i, `2 J( ^% X! {
if pcolor = green [: |& L" t" w* f4 ?. L' P1 x$ i
set pcolor black
' `* c: c# Q1 L7 V' [' S# k set energy (energy + 10)/ o, h: ~/ X2 J* n$ ?0 T
]4 C9 ~: I3 }. h) O O% ?
ifelse show-energy?
4 d3 B1 K, \5 _+ r4 G0 L" ]! w# [ [ set label energy ]
2 s! e# {& s+ W8 O [ set label "" ]
7 X) n7 P3 {/ i5 q/ Q" x ]' _3 P$ C# M9 C: c- e9 @$ q9 E
end C3 i# R* D0 S
to reproduce
) s6 R0 t/ W% t x- V( {" @& Y, D ask turtles [ _) Z8 B f" B9 C u2 p
if energy > 50 [
+ h% ~% u/ Y* ~5 T Q7 i set energy energy - 50
i* ~( C% M- M6 j* _ hatch 1 [ set energy 50 ]
# k" P; b# Z: e1 G ]# T; H( b; K( ?9 R) ^/ R1 t
]8 X5 w5 b% o+ Q6 @
end
1 V( i \0 `0 j! N8 c) dto check-death6 b1 o, @# m$ D) ^ |
ask turtles [
! P2 O" Q, u Y1 ` if energy <= 0 [ die ]2 n! o# I0 I, E$ ^
]
7 h" c# a0 J( L1 K* r. e4 D, _# _end4 V0 E& U' f& X5 s2 f) ^' ^4 @
to regrow-grass
3 O" [ f! D0 P5 j ask patches [7 U. }: {% D) L! V& V8 Z
if random 100 < 3 [ set pcolor green ]
- W1 W. Y9 L8 A+ I ]
# `1 {: P. I8 b8 eend
6 H4 t; r+ ]9 j* c; hto do-plots
6 \: C: `4 s# K1 Y) b set-current-plot "Totals"/ w/ m' f$ a6 H1 T! ~6 P
set-current-plot-pen "turtles"
* i3 i, M/ l" V plot count turtles1 A$ R. V& y. J4 N; |! U$ X
set-current-plot-pen "grass"
/ R3 R. X8 \/ Y; p) O, ~ plot count patches with [pcolor = green]
) L4 p- H6 \' d+ j) cend2 X- d& k. H% i) P) L
可是运行时提示no such plot: "Totals") o3 l3 O# { e! q
error while observer running SET-CURRENT-PLOT
2 |0 @; N3 q( c& _ ?% x6 [ called by procedure DO-PLOTS2 p3 R, W: I W
called by procedure SETUP: ?* K4 S! h0 R+ n; o
called by 按钮 'setup'
# M$ @8 E$ a2 u1 b4 M3 s# V+ j2 l求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
