我编的程序如下turtles-own [energy]. ?( \ h7 w- W+ {6 E& \
to setup& L4 m0 Q" ]2 h
clear-all9 o/ U, H* y- O2 w9 a2 A0 {
setup-patches! D! O5 w% }; }1 C( P7 v
create-turtles 100
! w# n# i! ~) B+ s7 c do-plots, Y o, L( r) l+ L' a
ask turtles [ setxy random-xcor random-ycor ]
" h$ O1 I5 R4 V2 B1 M% y9 Send& x& f" p0 O" B) X- l7 ]
to go
& \5 T# R4 ~) h9 O move-turtles' E7 c+ W1 y4 I6 ~& p: ^
eat-grass
9 |/ l3 z4 y5 E$ r7 z reproduce
. R- m; u+ s' @$ [ check-death0 X/ y' w8 e* o2 @7 {
regrow-grass
+ x. F# T" b/ v do-plots
2 r- G7 f8 _) m3 R' Lend
, c6 N# g4 o7 a4 x. @to move-turtles9 }# [% u5 g$ ] y- F" [- ^$ G
ask turtles [. w, l; W5 u8 P
right random 3603 S7 u4 s7 v7 y8 g; t
forward 1; A1 i" i# [+ }, G" J1 P N' d
set energy energy - 1, U0 m% V/ W3 a. u) R7 p
]
9 \9 g# G1 w; K7 L, {9 aend
; p2 ^, C0 {2 z9 Hto setup-patches N7 W( ^4 |1 j$ q$ ?
ask patches [ set pcolor green ]! _( y5 V$ ?$ ]9 K: ]/ ]: ]# G+ E
end# I) ?: L6 g2 t4 x- l; P ?
to setup-turtles
" Z8 ?8 y6 R8 ~( Y/ W create-turtles 1004 ^& P6 l0 w5 |
ask turtles [ setxy random-xcor random-ycor ]
! a$ A; ~$ A% ^end( J% I+ U7 J ^9 K# s
to eat-grass
) K% N/ ~ L3 _: B ask turtles [
2 ^; N) o2 S: ~7 A2 S if pcolor = green [
d: p+ ^* F5 G, G3 Q' k4 N set pcolor black
7 m! e0 Y; z; V, x set energy (energy + 10)
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ifelse show-energy?9 E/ j# v) ]9 \( }" h" ]+ k. t/ Z
[ set label energy ]" p: d8 z+ x& d2 i! w/ O, \" M+ n) x
[ set label "" ]
8 _6 B1 e1 U7 @1 n# A ]
* ^( `: T0 p& send( d4 j+ }/ @" |" F& g! U
to reproduce
4 |) \( s" [5 A0 V' i, K; B, v ask turtles [
% l; E& D% Y& k: R! }5 w if energy > 50 [
/ |9 s. O4 r/ i4 W9 U" G$ O set energy energy - 50
( k4 y7 Z" k. Z8 C0 X hatch 1 [ set energy 50 ]) M0 O2 r+ W- w/ J; T6 }
]3 o6 L( g2 s) C, b0 H1 |- g, z) u
]
1 _, T' T. o8 x! F |" U# ^3 ^end* L4 V5 E$ ]2 X$ B! Q5 ]
to check-death: e! n% f7 u; @0 a. Z! v" [
ask turtles [" T& n! Y' _, ` M
if energy <= 0 [ die ]- C; O8 A' ~8 {% y# `1 W K
]+ n: e) I' a1 D7 m2 N
end9 e- E4 u* W( s2 N+ C U( _
to regrow-grass
2 w9 H6 a5 S& t: z) {# F! t% [% ~( i ask patches [
1 e ]4 N8 D+ c% {9 L6 k if random 100 < 3 [ set pcolor green ]$ i! f b' l% o. r: e) l- J7 }
]# p/ n. h$ l: n+ w
end
' U6 g8 v/ `$ Y6 l+ ato do-plots1 d% [7 \" x! W7 b( F
set-current-plot "Totals"2 {" J9 d& _; _
set-current-plot-pen "turtles"" m7 {# X, n2 o* P9 J6 `6 d
plot count turtles1 o: o3 ^4 w" F+ S
set-current-plot-pen "grass"
B1 H' ~% O( u. n" h. i plot count patches with [pcolor = green], P7 J) r. Z' y" H: R l1 s
end$ {0 E: W( I: ^2 `$ v
可是运行时提示no such plot: "Totals" d" v2 }2 p, F' c
error while observer running SET-CURRENT-PLOT
{" n/ {4 e, p+ W6 e+ l called by procedure DO-PLOTS
3 T* ]+ z. v; g9 U, ]" I% @ called by procedure SETUP/ g8 Y5 v8 b0 j6 b8 P& F% f
called by 按钮 'setup'
7 S+ o4 ^ h* o5 e1 J9 T5 r求大神解答啊 |