我编的程序如下turtles-own [energy]( O) s$ M' U) h P
to setup. f- \8 a) Z2 o! @) I, P7 ]8 N# U! v
clear-all
9 h- I+ @. V3 _/ S f setup-patches
0 Q" k9 T. u, R' x- O& \, J1 o create-turtles 100
1 R9 U/ d9 p* e# c2 g. f do-plots
" F* q/ H; ~& W0 \9 m ask turtles [ setxy random-xcor random-ycor ]
/ O; p& x- G9 Cend: M4 t' o0 e! s/ C# a
to go
* _5 j! G7 n$ N E$ z: K move-turtles( i3 v) h+ K; x e3 F! F8 C' v
eat-grass& W9 c6 @ f% U
reproduce$ C/ d% n# O; W# n1 u! u) m6 i
check-death
- r$ L$ E0 a8 E* \, n# m7 Z1 L regrow-grass! t( g, R% u9 _# |/ h& F: F! y
do-plots
4 U4 H) t5 q1 |* vend1 y2 @5 ]9 K6 |# [% T
to move-turtles
" S8 [" h. w4 J- r6 r: u ask turtles [
' Q) Z' S' Y% N, D# ^4 O7 Q right random 360( j2 m" y$ p* T P6 k$ n% V
forward 1
" g% ^+ L R: u9 t0 l set energy energy - 1
4 e* k: Q; v8 j: b" Q0 R ]
; f! X3 S% N* _' e; ^: @end7 ^( p0 w8 a2 K
to setup-patches/ F% ~/ g$ @% X1 S) O! `) D9 l% N
ask patches [ set pcolor green ]. l1 f4 {" c) ?" B9 h
end. H# m2 S. ^% F: G& t1 i; U- c9 o
to setup-turtles
4 n- d6 b; Q, `9 A# z5 w6 ~/ I2 J! y create-turtles 100. `1 l6 F- A6 \2 s# O2 m3 c; F
ask turtles [ setxy random-xcor random-ycor ]0 d# \9 `0 d1 L0 v4 [% Z
end" W" O* e5 f9 @2 \0 P/ H
to eat-grass
% M1 o5 t/ h# P% r ask turtles [# Z, f: T) [: W5 \6 |
if pcolor = green [
+ }; n' ~: a; }5 Q* O set pcolor black, l; X5 ?5 {8 r$ M5 }* m
set energy (energy + 10)- h4 b6 j% l) f
]
4 X+ F @* {! G' f4 M+ a% \* B ifelse show-energy?7 z5 r' _2 a9 Z
[ set label energy ]
- |. c5 e0 w/ j+ h* q8 _! D( e0 q( p [ set label "" ]; b& D+ h5 [% b2 V- V" ~$ V
]
0 Q) X+ N& m( R: g& T% u# A6 D# Bend
6 u3 t. ~8 @' n( }+ f3 Uto reproduce
- Q4 @% D4 L X4 A ask turtles [
5 |3 g* u4 D7 ?' t. X! }+ h if energy > 50 [
! ]# V' L$ q# w- n( T set energy energy - 50
; ?3 u# k7 I5 \' t hatch 1 [ set energy 50 ]8 Z0 _% K# H5 h. m8 F
]0 J$ }6 u3 c% \0 }5 r% t+ Z! o, I/ `
]
$ o2 V+ B9 d' `! F) U: Qend" s% T! {2 t7 a& `' ?
to check-death
! M7 S, p$ q7 C! P) V8 P ask turtles [
* j* u/ g/ }' [8 w& C+ X if energy <= 0 [ die ]
1 b5 q- @3 U* v5 x- l/ V0 E- P/ w6 J ]- M" o0 q& y* q! h" H# e
end
0 b6 }! P+ u- t0 N" A0 n8 U+ L9 Eto regrow-grass" n3 r* x0 r; q, ?
ask patches [
, ^; ~6 ~/ R! }9 j3 c) L# _9 Q' ~ if random 100 < 3 [ set pcolor green ]7 x- o; s% ] H9 t, I
]
* t- U5 J2 I& R* a7 A. v/ M; Tend
7 N9 J$ ^: p, pto do-plots1 v( I* r1 }7 H( {/ \ y
set-current-plot "Totals"
J: n: T; ]# z" t& G7 g set-current-plot-pen "turtles"
0 v5 |% j( f0 f plot count turtles7 l2 c9 W8 y: s% @. c
set-current-plot-pen "grass"2 C' Y/ s+ i$ e7 J b) [8 l) m4 _
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"* K3 P' i9 k1 A6 {& N
error while observer running SET-CURRENT-PLOT; k/ b$ b' ]3 b, _. y' _
called by procedure DO-PLOTS
9 m9 u2 n" P: D' Y) H. L called by procedure SETUP
1 Y7 H# E! O2 I) a- C5 f E called by 按钮 'setup'+ I- E( |5 k2 o
求大神解答啊 |