我编的程序如下turtles-own [energy]% s& a# N$ U$ T9 b$ A" u6 g5 [9 a
to setup
0 Y6 `6 r3 _/ M8 O" h clear-all) ^# v2 E$ N: V
setup-patches2 x' y: b. U" [6 Y# a
create-turtles 1000 S p ? K' P3 K! x. g1 P) d9 a5 {8 x" ^
do-plots' Y' \3 m T( ~ G
ask turtles [ setxy random-xcor random-ycor ]
+ H. S5 s* U5 n# v% b0 Qend
0 t. Y$ L. }9 B' F4 p8 X2 K- Xto go
$ T8 f2 ?. j+ t) B8 k- n" e move-turtles
* `! J( q+ ]) K1 z( [4 B) j" ^# ] eat-grass$ v! u9 R, D% g( B2 C
reproduce
" b& s" T6 K/ J check-death4 v$ S G/ v" m6 S3 ]
regrow-grass$ F k8 C/ M% @
do-plots
6 j O6 C9 H7 Y6 b' v1 y) D* h: Pend& i( r& z2 Z- r
to move-turtles
! g% Z. X9 t7 P6 c+ b0 o% U' L ask turtles [
& ^: `# x8 |* }: [' V% V right random 360 l1 b9 q- z2 z" |, D
forward 19 X9 ^: |' c+ E% A$ B# P
set energy energy - 1
6 j4 Q9 R( S; z! h& q7 z% O ]
+ M, g9 F: {3 i$ Y/ ^( ~end% S- {3 ^" o. W/ z
to setup-patches* T1 w* n* e$ j7 e$ p8 m
ask patches [ set pcolor green ]8 C& z8 ?$ w# W& V4 D w
end- B5 e- z: n4 X' w7 w
to setup-turtles
, ^, n9 K0 R; G2 A. s4 L% } create-turtles 100
) ?3 b( Z0 @7 F% ^ X) F. f# G ask turtles [ setxy random-xcor random-ycor ]
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to eat-grass
, @# X8 p9 ]$ J4 }, f6 `: y/ y ask turtles [0 p+ d/ \+ `4 [2 I
if pcolor = green [
5 f1 }) |7 N; b- E, ^- r set pcolor black+ S# h( `9 E \% K/ g4 m
set energy (energy + 10): g: N% e, _1 }+ F
]/ q- Q$ r& Z* r2 G+ f a! e
ifelse show-energy?
/ n- @) A( Y1 B' r$ e% z% ?" `' | [ set label energy ]
& y9 w, z7 p/ k+ R. \* M! L [ set label "" ]
9 b& p" t: t/ C; k1 W- p ]
* j) m3 n0 C2 L; _2 V) O) Nend
1 A% I% C1 C' l' S7 _. cto reproduce
7 T$ y; I7 ~# @4 {2 j6 ~ N ask turtles [
9 N. A) W" t0 F5 o4 G if energy > 50 [( T& \4 Q1 |- Y( q3 Y2 j3 S
set energy energy - 50
" I4 c. l5 w$ \! w5 U hatch 1 [ set energy 50 ]' _5 Y7 U7 M9 W& F2 W" s/ b
]1 @1 [# y7 B, U+ K
]7 T8 P6 f+ o6 m) |5 |: c
end
* g8 ?" {( s* k4 ^% ~: tto check-death
( e" j% d4 h- c6 B ask turtles [
# z! h% X& L* i if energy <= 0 [ die ]
1 q' Q4 I- r {8 Y# h. n ]
9 c5 e! T6 H, Q, B3 I- pend
' I2 l/ ?; [6 L& f6 r1 Pto regrow-grass( Z9 \* N) }; H5 X# F: e! {
ask patches [
, p1 O+ f% S+ ^$ j5 H4 Z if random 100 < 3 [ set pcolor green ]
; L l& v5 t+ O5 c ]
" ^' O% t- F( \) Z) L/ E+ k( @end
- x2 v6 [0 x: C$ R( \to do-plots
+ f4 b- H, A0 B) |$ `' _$ u set-current-plot "Totals"0 G" w9 A9 V( Z
set-current-plot-pen "turtles"% ?8 ^# M! o" _/ ^
plot count turtles+ x6 r& Z2 Y9 o4 X
set-current-plot-pen "grass"4 O+ k1 _$ K" [& s# `5 M; b, [
plot count patches with [pcolor = green]
2 R) D' F, x8 J, ?/ I- hend
1 K! h( \9 z# w, H可是运行时提示no such plot: "Totals"& n/ ~: L& V, p! X# p
error while observer running SET-CURRENT-PLOT! f; T& c# k( j) p/ c2 n O' @- }
called by procedure DO-PLOTS' C2 U) Y+ K1 Q0 l4 r4 _
called by procedure SETUP2 L% h( ^* G+ @
called by 按钮 'setup'+ x ~ @; J& g: B O
求大神解答啊 |