我编的程序如下turtles-own [energy]
8 y+ k) n" x, X, j6 I; tto setup
. K& r P# m2 B clear-all0 M" L: n# H: G j4 p2 u
setup-patches( H/ K6 E! {5 z9 C; F2 e- T
create-turtles 100
/ Z- T/ S* ^# |* r3 c7 F. {1 \( p do-plots2 n! N$ P( v" j0 c1 {8 c
ask turtles [ setxy random-xcor random-ycor ]3 x( W( J6 p8 s3 H* J, j" q
end
% z9 f, T- A B0 O1 d1 e* L" Lto go
3 k3 W5 [$ p4 F w+ ^0 C7 k2 a move-turtles4 M( q- X( J9 j. b
eat-grass
" |5 E3 G& O( N' w2 Y. F0 Q7 s) g# Z reproduce/ i/ U3 S( X3 g- `1 @0 O
check-death
) Y2 q! O C! j regrow-grass
( h V# U. }: L# h- f+ h do-plots
& N4 O6 v# s2 I# A8 |# l4 wend! g( V3 c* |9 }" ?/ ~9 e y
to move-turtles4 }; j% P7 C9 Y$ a6 M
ask turtles [' T0 z2 Z( W+ f$ q
right random 360
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set energy energy - 1
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end
* m+ H- s" s3 f% I2 t/ G- kto setup-patches: F3 x4 W5 q) H7 ~! ?9 ?
ask patches [ set pcolor green ]
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to setup-turtles
/ G& j8 [- `$ T$ N5 R6 v* o$ r& Y create-turtles 100) D! |+ p% C4 B/ q% Y
ask turtles [ setxy random-xcor random-ycor ]+ t4 I! q1 V4 i' Z
end
1 G: ?1 _& n2 _$ c: n% _7 J; a' jto eat-grass
6 n3 h2 C* Q9 _5 ^* T ask turtles [6 g# f9 G* \# A$ G" f# C
if pcolor = green [7 b6 G& q/ \+ @* K0 @6 W6 b* k
set pcolor black
8 W1 L' p) n9 n) s6 [7 M" U! D1 |3 } set energy (energy + 10) ?* ]2 V" t9 @+ J# j2 W
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ifelse show-energy?
+ i8 }& Q! z E6 J$ Q [ set label energy ]8 C J* I2 ]; r- u" ^2 ~5 ]
[ set label "" ]
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end
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ask turtles [% i. O: L& \) f' r+ i7 G& V7 b4 k$ S
if energy > 50 [3 {% n* N8 T9 N7 n+ p0 ?$ `
set energy energy - 50
0 J+ C! X$ f# w8 C" c1 Z hatch 1 [ set energy 50 ]* b5 x! B2 l) D* B$ I( B
]
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8 \$ {6 W. T+ ?) Z5 lend
5 Q- o" c( ^7 [+ t1 Gto check-death
" K9 [; y" v% o0 Z. ` ask turtles [
5 v+ ~: _- }" e0 e. g8 u if energy <= 0 [ die ]
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end
d' l6 B" J% K/ O, s% Cto regrow-grass
! ^& g# T" X4 l* |2 ]/ P: ^8 T ask patches [
3 @% o# o! [5 C* Y8 c if random 100 < 3 [ set pcolor green ]
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end
5 y: R, }9 V" L2 T- W! Cto do-plots
b# C& r3 t3 i' ?# c set-current-plot "Totals"$ R5 q U. P! b% w9 B! |) t
set-current-plot-pen "turtles"
! L- T1 n$ I( q( g& W! e plot count turtles' y' A% F+ D% b+ z) ~& {) w
set-current-plot-pen "grass"
: H, t8 C* X6 k& j9 I4 C plot count patches with [pcolor = green]
% |) o, ^0 A" Q5 z+ }6 Cend: P R4 x* V$ F5 a- ]
可是运行时提示no such plot: "Totals"% k" E# ?2 s7 B9 B& D
error while observer running SET-CURRENT-PLOT* O v. ^7 W$ M8 w7 d$ f1 F5 w
called by procedure DO-PLOTS. J! d+ [; Z, Z
called by procedure SETUP
5 b/ e4 g8 I3 R8 G0 z called by 按钮 'setup'! s' L% f' R9 Z7 s3 }+ p# W+ {
求大神解答啊 |