我编的程序如下turtles-own [energy]' }( z# O5 C" p+ P) ]9 X* l3 {+ y
to setup' P" Z0 Q" x% w0 V, Z/ y
clear-all
; j6 u4 G( B- D2 f; } setup-patches
3 ]; E* m4 n, C0 \: x) o+ ?; n/ _ create-turtles 100
8 U% H u5 h C9 Q; T$ S do-plots1 C/ S( U: \7 x, R( y4 a6 E7 s
ask turtles [ setxy random-xcor random-ycor ]3 ^. [& u J$ u* G" g( M5 A
end. y0 p. K4 \& `; N; ]
to go
; v2 }5 _5 }- G- j& D# n5 f R move-turtles3 O+ r/ E7 i2 g _4 G2 G$ E
eat-grass
* h. R7 B) [2 N* P7 G6 ` reproduce& |4 ], ~) @. D6 U
check-death$ r$ ^- Q' }1 A
regrow-grass# S2 D' k+ ~6 ~
do-plots$ M; f6 l& P2 }2 q. ?& ^0 O
end, v2 \4 M7 ]. X2 S! M& q% i; L
to move-turtles
/ r' d9 t- x* d; c, H ask turtles [
( l0 n+ n3 o$ z right random 360
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set energy energy - 1
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end
3 S! t. F) ~' J. S" \to setup-patches0 f+ x3 T+ y+ W+ |; z% y3 v1 l; \
ask patches [ set pcolor green ]4 r- M- e6 ~9 k. p3 E; t! K
end2 ^7 K! {" B& d% Y, H* _% ?- @6 k
to setup-turtles
) g* @9 P7 r7 b3 [5 I4 d: `6 ` create-turtles 1005 K2 z. S* }/ z8 _2 i( j
ask turtles [ setxy random-xcor random-ycor ]
/ c: _6 q! t: e7 F ?% s" K' y, n) qend% {7 L: @- u, Z
to eat-grass
3 c' O K, V4 L. \/ r+ P+ T9 [+ Z ask turtles [
- c. [- s6 B! C. W( }! Y if pcolor = green [
' ^" f$ d; F7 ` set pcolor black' E! j9 U# S* Y$ v
set energy (energy + 10)0 g# J- `+ J' q/ P7 |( H
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ifelse show-energy?4 W! Y( C- G6 }" [6 ]
[ set label energy ]$ b- J% M* F% p: s
[ set label "" ]
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end
E9 f0 E. {2 }to reproduce
- H) i; w6 y' I3 X6 E& q) u ask turtles [
5 j6 `9 b/ g P2 i* E# j) i0 `2 _* W# Z if energy > 50 [
+ v5 } a; K, R# D set energy energy - 504 R" V) o5 c, d
hatch 1 [ set energy 50 ]7 e9 H1 Q6 {9 V. t
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end1 i% \% ^. h w$ g, t
to check-death0 @6 u; |+ K: F# @
ask turtles [0 U9 x+ i% }# m3 F& ?, H
if energy <= 0 [ die ]) W' T) [, D( {/ W# b
]
' k7 R5 D# y1 T: P4 ]4 fend% n) m( Z/ t+ P* g: N; R
to regrow-grass
7 o- C# ^. s' e% X( i f; G6 \) q ask patches [) c2 \# q ?6 O
if random 100 < 3 [ set pcolor green ]
# y7 j, _7 U& [ M6 n: h" F5 p' f ]
& [2 E8 w8 l$ j2 Bend- { z' k, B9 y# U! l, h$ J+ L
to do-plots* H/ w, W9 b3 Y$ F8 o
set-current-plot "Totals"! I% `- e$ E3 V% s# Y
set-current-plot-pen "turtles" E# G/ I! M* n# R- e
plot count turtles4 L) g( Y! b7 h3 {$ P5 n% Q) w
set-current-plot-pen "grass"1 U. A Y8 i) q& Z0 `
plot count patches with [pcolor = green]
2 ~) B0 k: m3 i+ b1 x3 Y2 M; }end
' a. D4 y3 s0 n4 n6 ^; S可是运行时提示no such plot: "Totals"2 O! ], h* t5 i
error while observer running SET-CURRENT-PLOT6 A2 y: W& j3 }/ y! V
called by procedure DO-PLOTS
$ h* V+ h9 ^0 F# M& V' O called by procedure SETUP
6 e# q1 W# H$ O! B. x called by 按钮 'setup'
: g! G1 I+ `+ w求大神解答啊 |