我编的程序如下turtles-own [energy]9 X3 t' Z+ z! D/ N
to setup; M- [( v$ H8 u+ W% K& V; w' |
clear-all
- d8 ^8 q8 \' \+ | setup-patches
: m, S8 M* ~2 E+ u" ?5 Q& e create-turtles 1004 x! L9 V$ b5 X1 P
do-plots9 x6 V! w7 B5 e
ask turtles [ setxy random-xcor random-ycor ]
7 q; Q9 S# i+ ?) U1 I! X. p# K1 {end! ^9 Y0 ^2 M( n
to go% F2 W; I( ]# R( G$ B+ Y) j
move-turtles
5 w1 I, T' Z- ?. m2 s4 K' p- T eat-grass m% R6 C& W& g" D& A) t
reproduce
7 [1 X, o: \$ O2 \* d e check-death! K( M; @" K# T; ^1 }2 n: S; D
regrow-grass1 j+ V3 v. Z3 ^
do-plots
7 L7 Z0 z1 D* k/ v$ `7 Jend6 I0 S( B$ |- i0 M# B M+ v
to move-turtles% s7 t2 m. D# I& f6 v, R
ask turtles [
/ b, k6 g _0 b8 v* K+ { w8 j right random 3600 S, B" Y* n# ]. ?
forward 1
% p3 Q+ z* C9 H/ S% R, l( ]' P0 n set energy energy - 10 t7 z- ]2 m, s, s
]$ m/ t- C/ C5 x4 j0 n& y- _2 Y
end0 z) @2 k# Q% B u
to setup-patches. q9 v4 D5 {* S! A4 G$ ^' h
ask patches [ set pcolor green ]# L2 Q2 O1 ]$ V- }2 i- a0 t7 Z) D
end
" j7 ^; W# U' @2 ?to setup-turtles$ C7 W2 V. S; ^/ m: |" l( x
create-turtles 100- G$ d# }' M/ y# Q0 _6 z
ask turtles [ setxy random-xcor random-ycor ]7 i# d+ T" _7 B4 H7 g
end, D" y, |/ G! t: W1 |1 ?& A2 p
to eat-grass
, |; w, L( p) p" R, N2 A( V# t# R7 l% ^ ask turtles [7 O( I4 b, T; f8 Z, m9 {8 ~
if pcolor = green [
+ R- V3 p' ^# F3 R# D set pcolor black2 m2 }8 B4 ~* W( F, W0 Q3 M
set energy (energy + 10)4 {8 j! g2 R4 q% E$ C) R
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ifelse show-energy?
" ]6 I$ p$ c5 ] [ set label energy ]: h$ u' ]4 k% f) a" _& y
[ set label "" ]
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to reproduce
/ @ t' V [3 B# R ask turtles [: u* H: W1 X _7 ]+ t
if energy > 50 [
7 k# Y; Q$ c8 g( O& G set energy energy - 50
9 H) z* n* W0 t5 q9 ~3 a s hatch 1 [ set energy 50 ]
% }0 g( G+ w) i3 m ]( v* m# X- { A0 K9 T8 ~
]: u# u) e$ v% z' y: Y9 I2 l
end* m1 i) K, V$ S3 H( ?& s- e d
to check-death% Z4 z, S- f8 h1 |
ask turtles [
& J+ g; ?9 ]; n4 @7 C# B if energy <= 0 [ die ]
0 ~' m+ Y* a0 r- I. W+ C ]
( u& J: ^. p7 z6 ? ^% qend) R6 K& `2 L) h& [" @
to regrow-grass
# l# @8 B$ i) ~0 o9 q, Y! l ask patches [% }0 A" {% a3 B+ X+ [
if random 100 < 3 [ set pcolor green ] X( X6 N; i% V3 h
]
8 Y0 ^$ ]7 G" F/ X- P6 O. n% [& Uend
3 [- d) K! K5 @$ @( Xto do-plots
5 O( e$ @. Y# A& g/ F% N" w# y set-current-plot "Totals"
$ g6 `: j6 N, q, g& c set-current-plot-pen "turtles"9 D1 K4 ~- o/ U1 C0 ]; _. A
plot count turtles
6 n& F0 d; r( K' M5 R7 w6 \ set-current-plot-pen "grass"
2 b9 i, E3 ?7 M% v plot count patches with [pcolor = green]% e6 L# I2 x' M; a7 Q7 l; @
end
' q) w5 _. J, L/ v0 S) E可是运行时提示no such plot: "Totals"
+ e* ]8 h# V$ l2 terror while observer running SET-CURRENT-PLOT
9 c1 O1 R8 _6 K3 Q. a9 T9 p called by procedure DO-PLOTS
( F1 z' s% e6 t t' M+ } called by procedure SETUP$ N) D/ A0 M6 Z, L/ P7 u( f
called by 按钮 'setup'6 n$ O3 K) X6 H
求大神解答啊 |