我编的程序如下turtles-own [energy]
/ f0 Q5 o! v& F# n/ _0 Sto setup& }" }) n) m) M- f
clear-all1 o, y3 f8 z- h0 Z s
setup-patches% D! u T+ x; n: u" Y& a8 T
create-turtles 100) L0 E. H5 m3 F* |4 o% _* j1 `
do-plots. m: ]6 m5 T V/ @4 L- v
ask turtles [ setxy random-xcor random-ycor ]2 t( X1 |0 o* m2 P
end
# y# U/ w0 a- p( u! e7 A4 x+ m8 G3 Bto go/ A, Q5 r7 n6 M* F& y8 O: q
move-turtles
) y: ^5 U( z9 R) T* l) ~ eat-grass! Y1 Q3 E7 P- _# M
reproduce% \5 `& \! L7 v& _' f( R+ m
check-death
: t7 v+ C1 |& i7 E regrow-grass6 q U0 B) L+ h8 v* ~* _7 h. l
do-plots
' J; U- A' b- J7 Z5 I/ cend
; ?( p; \6 {, ]6 Q- U) L3 ~- sto move-turtles
2 \7 |4 G0 ]4 J/ h- [0 d+ ~! M ask turtles [
/ r* c0 x6 W7 a+ ]; e right random 360
& U. Z" a6 t& Z- F forward 1
$ }) J; I: K. C* N9 N6 p set energy energy - 1- o ~% F; G" U |+ R
]
8 l* }! h5 ]5 xend, g: X' t( |: T2 l9 T+ J
to setup-patches
7 R6 b; e# @1 k% r" s. ?- f ask patches [ set pcolor green ]3 l' w0 T8 s' E8 p/ f, U% \
end0 ]) a. S7 F" H! A7 E% b8 p% J
to setup-turtles$ D2 h8 J9 P; S A4 G8 G! W! c4 I
create-turtles 100" ]" l# R. W2 K: B2 Q
ask turtles [ setxy random-xcor random-ycor ]
( f5 z8 |0 J& Z" Dend
, s- [1 w* G8 a ~- \/ w7 ^to eat-grass) S/ Q2 G, D2 W: d+ W% Q
ask turtles [: O! ?& m: S1 Q, U9 j4 m
if pcolor = green [
2 n8 m0 O- d! _8 n: \ P# Q set pcolor black
. ?3 j: t9 B9 ` set energy (energy + 10)
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ifelse show-energy?
5 k& L0 y1 a" q$ B2 j7 }. k [ set label energy ]5 ]& G7 b9 |6 J) I+ K# g
[ set label "" ]$ B8 ^6 [$ m+ P
], }: T3 p" B. e/ d% r; Y" n) x
end. ~$ K3 s7 q7 I+ h* O5 v
to reproduce
, n6 k/ a% j1 p, Q ask turtles [
; `6 q1 B) g I if energy > 50 [
. C) a# z7 M7 q" T: q set energy energy - 50
. |! G$ ~2 {9 x6 d2 G hatch 1 [ set energy 50 ]: Z6 s5 _* p4 {% l6 k
]0 L- k. D( w' j" V+ [/ F/ i
]
: q* b' Z. t4 Z$ K9 a! K% j0 Lend/ J- m5 x9 {2 M6 |1 r0 X
to check-death
# e& _8 x: a& @# M8 s ask turtles [
, c1 ?2 X! C- `. w) V! M if energy <= 0 [ die ]
# M3 T, v' G& J) l4 S% I ]
3 c5 ^/ v4 _& L# `1 B0 z" w" F2 yend
, r$ O* f5 X" ^& Nto regrow-grass
0 j. E+ c2 V& y2 A5 K ask patches [; U" b6 d) d$ `/ @- M
if random 100 < 3 [ set pcolor green ]
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end) y' J9 C8 G3 G+ @
to do-plots
+ m8 n8 `- p/ P* X set-current-plot "Totals"( l! U# S" O" `1 H9 W, V2 m
set-current-plot-pen "turtles"
$ A* P4 x; u' h B2 r plot count turtles
& D) S. G' j8 F7 M set-current-plot-pen "grass"
+ L( g5 c3 M7 U ~6 ? plot count patches with [pcolor = green]$ E7 Q+ w6 @3 Y" s+ S* T9 L7 I
end) a# @ M: D/ M- l. b, v) u
可是运行时提示no such plot: "Totals"
v3 W+ D3 J4 g# A, R3 I& L% Rerror while observer running SET-CURRENT-PLOT# B& T D: A, C5 q; b: C
called by procedure DO-PLOTS
( F4 }* i" p, N; O called by procedure SETUP
: n: T' N' l( X9 l e: X called by 按钮 'setup'
' i! O9 O. H3 H, i* Y, B求大神解答啊 |