我编的程序如下turtles-own [energy]6 B. f! k" @3 `/ F) t
to setup
5 L0 M: Y. p. ` clear-all
* y. g; X: f9 G4 X6 L% i setup-patches6 c9 |& D i$ e0 E; {# j
create-turtles 1009 ?, x. \! P! e! g v) P- o% g3 {
do-plots
" o% p- {9 V* Q/ F ask turtles [ setxy random-xcor random-ycor ]; A, T0 e% j6 s+ T: Q* \; ]# B
end
7 a7 x7 }9 n) G2 W1 eto go
0 C; B; ]' y3 r* R; s% [ move-turtles- p& \6 y9 M* Y- T( [! o8 s7 r
eat-grass9 u/ ]+ ^& W0 ^: C/ b/ P
reproduce8 V& p! y/ u. N) q
check-death
: b: }0 Z7 a/ {9 Q/ g regrow-grass
0 y( G& w7 ^! I5 h1 d6 p do-plots
$ v& I+ N/ F! ?* q7 h7 Uend3 \* S$ V: L% H! ?+ S( A1 l3 c
to move-turtles8 ^, i) x) M2 o4 X, Q, `; [
ask turtles [" t9 I8 M9 O5 h2 F5 ]
right random 360
. G! P3 m# N x" J4 _" P forward 1* D$ ] t$ s" T# ~/ e! H9 R8 v
set energy energy - 1: j; s2 t/ N/ T( [% c% b
]6 {3 _' N# \8 X; D; x. a
end
4 F; Y4 V! [4 Dto setup-patches0 e; f' I$ E9 ?1 L
ask patches [ set pcolor green ]
/ u+ L" }& S/ l, ]: W7 \end
& t7 p" Q; V4 i. [to setup-turtles
% ]# j6 O- d, O create-turtles 100
) n6 l4 ^2 ?0 U5 t* b& _- M ask turtles [ setxy random-xcor random-ycor ]
( j$ K: ~3 E# P) @6 l+ Oend
9 X0 p! ? D* W: K: G) mto eat-grass
* D% c1 Y$ i2 \6 Q! q ask turtles [
; q( v1 y2 B+ h# T" R4 t4 U0 R if pcolor = green [6 u2 k( F3 w k. Y; [7 q( L, X7 m6 C5 _
set pcolor black
- p0 Y2 Q3 Q" f' d set energy (energy + 10)
! Q1 N% S/ [/ E ]
: c! c6 G6 q3 A% H$ D" ]. O ifelse show-energy?
9 j+ b1 V; v8 B/ S/ X- x# y4 g [ set label energy ]
) ^2 X) E8 \5 t0 R# t [ set label "" ]
- l1 e% I% S) u; ?7 Q9 p6 ] ]
( v) K8 ~% w& r9 @. o+ Jend% z. h6 B& ?8 E* P9 K
to reproduce# h6 N" @2 _* `# I! K: i) e
ask turtles [
3 V! J. h# x. b( P1 O( C' `! m* ` if energy > 50 [
) B0 f* n0 z' T, K) T1 P set energy energy - 505 @! V3 @: K# B$ n; c4 n9 G2 L
hatch 1 [ set energy 50 ]; L% @8 I4 b) A9 I3 ]
]& j! }. Q$ ?7 g, Q& i' w7 G+ Z
]# t6 `+ X: ~9 f+ f% X8 A
end
" u4 ^8 I. s% q& |! u* Z) E; ^to check-death
7 c" g2 G- l) E0 B ask turtles [
" `8 A% o1 N# L6 R8 R" z if energy <= 0 [ die ]5 ]% K5 f& t1 O5 W/ P: n3 @
]
. g) {& U' D* I4 g- ~9 J* a4 Mend) b# _! F5 x2 Y! l0 ?) |* b
to regrow-grass
: o. I7 ~: \) Y ask patches [
6 a( y8 k1 l( B7 P if random 100 < 3 [ set pcolor green ]
' H" N, M: ?8 X+ J) b$ | ]0 l# m" h5 n. `5 p2 ]! q2 p! C
end
" Q+ K! a/ W+ P2 d# I4 O5 Kto do-plots
7 O( _& @1 Z8 p1 D set-current-plot "Totals"
. _3 Z3 Z' g9 B7 S: C* G6 n set-current-plot-pen "turtles"
; v; A7 y7 x k" e: l plot count turtles
, V1 f3 m- C2 P. i set-current-plot-pen "grass"
' s0 {+ }' M3 F9 B2 G* o* t plot count patches with [pcolor = green]3 q7 v" ]$ b, o+ x
end: P! z5 n5 O3 Q7 s
可是运行时提示no such plot: "Totals"1 K( q8 {$ @/ W6 u6 Z* H
error while observer running SET-CURRENT-PLOT
6 J0 J0 L; |2 A' ^8 x' x called by procedure DO-PLOTS
1 X9 X6 K9 W) A, G" |/ J called by procedure SETUP
' ]$ P$ `5 p6 n& c called by 按钮 'setup'# O+ \; D. a: K
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
