我编的程序如下turtles-own [energy]
0 M' ]4 ]. l9 q/ C" g) Sto setup
& p$ {1 D J" ^# a; C9 f) _ clear-all
" e) ^- Q3 ?8 ?5 Q$ h9 V( f1 M& u [ setup-patches4 m+ ^( ~) E; @% ]( m+ k4 _ j
create-turtles 100
! ?; T) ~9 W4 c, F) l% ^6 C- s: p! L do-plots Q, d0 n$ @) C% g; B
ask turtles [ setxy random-xcor random-ycor ]4 f$ S0 g3 ?0 G- X, l l9 e
end |' J2 v9 O7 ]( I% s
to go! P' M, Z( P& \0 f8 l+ R4 t
move-turtles& ?2 \! T6 Y9 z8 {0 _
eat-grass% r) S$ ^, V% P5 N4 F
reproduce1 R( H* I7 H* V0 V2 E f8 q9 M: g
check-death9 `- {# t s# D) _
regrow-grass: [% K( l0 v3 M* E
do-plots
% O3 b3 ]7 b( Uend
' i' `/ M. G+ \! A/ l7 vto move-turtles6 Q) f( C3 a) t3 p0 _0 v/ V) o
ask turtles [
# S( @) z8 ^4 P8 o; E/ O- E( j* v right random 360& ^& C" q3 j( K7 z6 ?# |0 j1 ^
forward 1* m" s! q% p6 Q2 H5 X' H
set energy energy - 1/ \, E5 A5 [' J9 T8 {
]* E% V+ ?% G+ r2 X. Q
end
/ G! z; n+ [/ f9 ]1 \6 a( p' T9 G0 U& }to setup-patches* D Y( K/ d, g
ask patches [ set pcolor green ], b: f5 R% f& b) L* S& K& \: R
end
; B& R" j" ]3 W. Kto setup-turtles
. |+ E, N5 w+ U5 [2 P create-turtles 100
" U7 @% y& g2 p+ u! Z, X) c; p ^ ask turtles [ setxy random-xcor random-ycor ]. \, d0 _6 @" n5 ^9 }/ z
end
9 H) h5 [6 p1 d6 K" @to eat-grass- \. y5 u+ O: e8 K2 A8 d
ask turtles [
. i, T6 w5 `/ ?" ^0 g) u if pcolor = green [- |6 d; n+ K0 O7 Q0 `5 p
set pcolor black5 g* g9 ^6 F+ O- G v! M
set energy (energy + 10)0 |( C/ X8 k; J7 o! h8 {
]
; W) o1 \; Q: Q! @6 ]* B# t% I ifelse show-energy?
9 t$ I' O+ [( b2 G [ set label energy ]% \" S- H# i0 x: T/ X. m' c) e% [
[ set label "" ]) {; f0 p( f. s1 P! |
]
% h" o) h! R- u6 s nend
! {2 h: D' P0 a5 M, T o! M" b1 |to reproduce8 U& K$ y9 v5 W M. A3 F
ask turtles [
7 O0 O" Z" s* D if energy > 50 [( ^/ ]) |8 e3 ? N9 ]/ n) j" b
set energy energy - 50
0 F+ p d5 q- b, n; z5 P1 ~. i0 b# a hatch 1 [ set energy 50 ]
7 j2 |+ Q |8 e/ ~ ]: L" h+ T. x( }' S/ k7 P
]
5 G; l1 i+ X5 k# q$ g0 A7 E. Zend5 E2 R$ O9 v- E' J$ Z8 |) I: l" ?
to check-death2 U7 |& a1 ?) v# g9 P, e
ask turtles [
v) u4 i# J( I6 ^& N1 S if energy <= 0 [ die ]6 L/ v0 x4 I' j4 Z \" b, I
]
. [# U9 t) ^% _: ~, Rend
1 e- m. i r( g1 Q6 q3 }+ vto regrow-grass6 g& R( d" H- ^; e' M
ask patches [# y1 E4 ]2 m# @& h0 @/ e7 l1 w
if random 100 < 3 [ set pcolor green ]" x; t0 O( l1 j
]! }% }) ?1 ?8 q0 P4 n! c5 I$ c
end
e, @, m0 K) ?% j+ \' ?to do-plots1 ^; k6 n$ W$ U4 ]
set-current-plot "Totals"
9 _8 _8 _8 U5 k set-current-plot-pen "turtles"
2 c5 z' [" d) t1 h plot count turtles) P( e z8 L4 `6 j6 b) T* W
set-current-plot-pen "grass"
5 X( p# G7 z1 K& a3 ?4 J' e1 i plot count patches with [pcolor = green]
+ K/ t' O4 S7 l- K# T) Qend
& V7 V r+ B8 E7 F8 d) H可是运行时提示no such plot: "Totals"/ q5 S; \! b& ` U* W
error while observer running SET-CURRENT-PLOT
' X8 E2 }" x* _1 V& l& T called by procedure DO-PLOTS
0 U, @1 ~: t- b) b2 X2 N called by procedure SETUP5 k9 h! l- x' g' n3 Y/ p6 s" q
called by 按钮 'setup'& x6 z: J5 T1 X. c7 |, J2 A
求大神解答啊 |