我编的程序如下turtles-own [energy]6 E) W/ {7 Y: _) v" h+ f, M
to setup
5 g/ V! ]) S9 T- I( X clear-all8 _" @' A7 [$ |5 J9 p, l
setup-patches
m2 [2 S3 R9 O; j. Y1 y! Q5 g create-turtles 100
8 F# W2 [& ~- U2 h do-plots' _: ]+ j F7 r( h$ d0 K3 H
ask turtles [ setxy random-xcor random-ycor ]
! C/ M1 J4 R6 x6 W/ u! pend
7 C v& i3 {) S; Mto go
# a+ I7 ]7 R5 N move-turtles, F" |: ]1 R5 Y7 f* c2 q3 l
eat-grass' |2 d9 }4 \6 |6 W
reproduce% c3 B9 W% E, j1 x! k( P1 l+ W: g
check-death3 v8 C3 r0 w8 A, @. ~ N P9 o( k
regrow-grass( i& P. n6 N* E( h
do-plots7 A7 c# Z9 f& {9 b* d
end
- o: A0 ~/ n: B& cto move-turtles6 R& d1 T2 i6 |; @) \: Y/ [
ask turtles [0 u0 y$ V2 v" ]6 m$ H' R8 F V
right random 360
+ s! O# C, b+ A. Y. @9 y: Y& V forward 1
, O& B9 ^8 B& l6 P0 \ @ W4 @6 ] set energy energy - 16 j8 ~5 {& \' I E1 G
]2 v9 `; K* X' h# o7 K& v
end5 M( B9 q+ H9 j8 r6 E. T* _
to setup-patches
2 h5 }) m% p I ask patches [ set pcolor green ]8 r/ W [. j' \/ {( Z
end; o i# V" h% y$ u8 E
to setup-turtles
6 k1 m4 C' p0 `& R create-turtles 1001 v g" r; \; y! E" H1 D: x; v
ask turtles [ setxy random-xcor random-ycor ]/ ]2 |; V% p$ x2 f/ v
end% O0 N8 e" W* m, o
to eat-grass3 y" X- o3 n& t# ^$ q- f+ P
ask turtles [
0 c, X0 g! Z) K2 U- t if pcolor = green [
. @" f* O/ k: K6 `6 t set pcolor black
& S* Y. P. S7 o4 Z set energy (energy + 10)7 ]7 o% W* j: T5 l: M4 k2 e! s5 P
]
0 j( s3 T: L3 x! p% s' \5 d6 Y7 k ifelse show-energy?% N/ R: C) ?( s# e
[ set label energy ]
* X2 N! ?' @/ r: b0 G [ set label "" ]
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end
+ u8 @7 ^. S! |0 m8 J# Hto reproduce s2 Y% l0 j; l& W
ask turtles [& a7 {; Z2 D* _- V+ n+ J. C9 m
if energy > 50 [
, O; j# V* b& g! r' T' w5 ?: F( F set energy energy - 50
3 a( I5 i; v, g1 ?/ f- q8 X hatch 1 [ set energy 50 ]% t: U5 y; l% n7 s; F0 Y7 {
]
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end
p: ~# J4 X% z# S# nto check-death
. S* z! p# O+ q$ n5 @* s2 _$ C ask turtles [
( _) Z3 b& j3 ]' g1 l: k- \ if energy <= 0 [ die ]* u+ P5 K" ^# j0 r& j, ]
]6 k' f; V% {; ?0 m, L
end" } J) ~# j. o# i, n. C% `
to regrow-grass& ~. a7 O8 ]* |. N" P
ask patches [
4 v, q: Q* f( \. i2 T if random 100 < 3 [ set pcolor green ]- U& |- ^& S- u+ a
]
; g; W) d! m0 ?2 W, k, l( m& Qend
9 J0 N4 R! Y+ v% n$ O/ mto do-plots. {& S7 f1 `" T- V9 _6 ~! J
set-current-plot "Totals"
+ Y" {0 |' P/ o+ r ~4 {7 I set-current-plot-pen "turtles"
8 V7 A! @1 L4 W plot count turtles
7 n$ p& S# Q8 c7 s set-current-plot-pen "grass"- t$ X& }: Z% p, S( { a E; ~
plot count patches with [pcolor = green]4 s& ~/ s/ Z1 R5 j) Z8 t
end
2 W- m' k, H; g7 a; G+ z: `/ n可是运行时提示no such plot: "Totals"
& K: Z0 C8 d6 k; J8 t, Jerror while observer running SET-CURRENT-PLOT
: f7 h7 ?( w m0 b$ z2 [' J0 w called by procedure DO-PLOTS
2 G& K* q3 y% { x8 E called by procedure SETUP
+ u$ j2 `: Y) Y9 I9 j0 o$ d called by 按钮 'setup'
1 t, ]% {$ }% e a. `' ?( S求大神解答啊 |