我编的程序如下turtles-own [energy]5 \+ Y2 N/ U4 y
to setup5 C; n( B; W& S
clear-all
+ D* g% B$ v, c7 ~ setup-patches5 r& ^, D+ T9 B% V5 a2 b8 U! D
create-turtles 1006 a, E2 q8 K( {6 w
do-plots5 K9 _/ B2 `0 Y6 ~* H
ask turtles [ setxy random-xcor random-ycor ]
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to go" \" x/ z1 B- n, W; I9 j
move-turtles U; Q* ]- t% V: s# G0 f
eat-grass
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check-death
2 }, g6 A3 E* u5 p regrow-grass
3 b. G& x; n6 Y9 y) T# |5 \ do-plots; x$ ] V4 i4 p6 H- _9 u
end
/ M. W2 v" ~+ q3 Gto move-turtles a% X2 Q/ D. R
ask turtles [
K: t0 h j2 S9 H7 w, v; O$ n# k right random 360
( [. q3 p- r7 J( h ]# n8 _' } forward 1$ m( @8 B4 y% I4 S! n& a- X
set energy energy - 1
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end1 K! `2 o c" z f$ ]8 m& u
to setup-patches
3 b! L0 H5 E, v8 P( B. c2 V* w) [& u ask patches [ set pcolor green ]
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to setup-turtles
3 m5 b. S9 C; ~% w. v create-turtles 100
E2 M3 v* j# e ask turtles [ setxy random-xcor random-ycor ]
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to eat-grass. H/ g8 v1 e2 W
ask turtles [& F% S+ w$ r0 X5 J* N1 f1 u" H: E
if pcolor = green [% k: U3 l9 \$ t7 {: k6 n. m0 D
set pcolor black" ]3 c k3 w" M# C7 L, }6 ~/ m3 G
set energy (energy + 10)
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ifelse show-energy? u/ S; P" v+ }
[ set label energy ]( ]" P1 [; b6 Z- A
[ set label "" ]
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end
0 \3 m) g0 p/ `$ S$ ]" R- `4 i! tto reproduce
' q U t2 t! a9 @ ask turtles [" y* g4 q+ ?+ e% U3 a ?( ? U
if energy > 50 [
! o; M& C P' @$ G set energy energy - 505 k" `" _4 t) m
hatch 1 [ set energy 50 ]( w$ c; G% K) U7 _5 p1 a4 q
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]
, N; J' e) ]' ?: ^: M0 k1 e5 R+ d, F$ Jend. V, Y3 ~ I5 p
to check-death6 j s" B7 z; A
ask turtles [
/ \/ B6 u7 y# J- i5 G4 A if energy <= 0 [ die ]0 K6 F* V# I1 j% k5 a; }
]
7 j# ^, D. ~& X1 _" }0 `1 a Gend* V0 ]# w# v5 ]7 x. J) T- F
to regrow-grass7 R7 H' H9 t5 b
ask patches [
* I/ Z; v1 n. B% i8 S if random 100 < 3 [ set pcolor green ]
* s! b3 O9 d* p ]
3 W& P) `( ^: G: E* A5 |' dend
4 o9 E$ O$ {) X, g6 \to do-plots
/ T3 |! p3 F4 N( t$ r, Z set-current-plot "Totals"
; {1 i4 e' n) ^5 e: o set-current-plot-pen "turtles"! G0 ?4 b/ y$ q+ M
plot count turtles
$ N, m; K& I/ Y3 C- ], S3 q set-current-plot-pen "grass"
( T* i( o( H; `1 U' o: @. _ plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"% y) u# |) \0 R0 K" y3 r5 d/ W
error while observer running SET-CURRENT-PLOT
1 A6 n0 x( G2 F8 v called by procedure DO-PLOTS5 m" b: S3 [) z6 O
called by procedure SETUP; T- U$ k% p5 U2 C" e* V5 i: d
called by 按钮 'setup'
% C; j9 o9 j! S) f# Q8 p. j求大神解答啊 |