我编的程序如下turtles-own [energy]
- `! i) W) ]$ P, K3 s7 Vto setup1 w* c$ i# o$ d0 m# A
clear-all# t2 X5 G H a% w% G: H1 E5 U- C: T
setup-patches
& v7 q, v m+ ` create-turtles 100
, Y H5 s' b% R8 G* ^/ x) c) Z5 U do-plots
/ _" M. e3 O9 H+ ]# P; v ask turtles [ setxy random-xcor random-ycor ]6 `( f9 a, a6 Y( ]) i9 b6 O) ^# S) i
end6 c5 f5 A# Z H7 u
to go
: v) R. ^; K% f$ u4 J5 k& c move-turtles
. @" h; u# X0 Q7 Q. o$ Q5 O9 q; |2 _9 J eat-grass) r1 h ]/ h7 B# X' j. B
reproduce
. Y3 F1 k% t# e1 R- o6 F check-death
' a; X+ c8 n# t7 O: v7 C; K regrow-grass! [6 s& k4 o/ Q0 l% L
do-plots+ E! X* B) i- J/ f
end, \8 ?- A7 e+ ?3 J$ E: |4 O6 N
to move-turtles) w5 g+ ]# c6 y, t) c
ask turtles [
8 B8 o5 w) c- ]3 ~ right random 360* | @( J* A: L/ O
forward 1
2 B2 l% g; w6 D m4 x1 ~+ m9 |8 p set energy energy - 19 Z' `6 b# [" q
]
; |8 x! g1 H+ v/ Q, wend
; y9 ^6 H0 B7 O3 s7 x$ I8 ^+ gto setup-patches. w4 o2 c& z2 y N; N
ask patches [ set pcolor green ] j0 v, K0 i# z) P* v1 F6 b
end
; C& a% A R$ p2 y+ F& ]/ j# fto setup-turtles
5 l; v, T" ^# j" b; E! i create-turtles 100
& Y# G+ }: p8 u* B ask turtles [ setxy random-xcor random-ycor ]8 S s! [3 E( l0 l C
end
+ ^+ w: i& c% l& }! e+ lto eat-grass
$ F }: r6 N$ J5 Q5 Q2 |& Z( i ask turtles [' u8 p" w$ ?$ f, c8 I2 y1 e5 H6 c- O
if pcolor = green [& H. |' @ H9 J$ T
set pcolor black; v# `7 R. d1 |" y0 L$ s
set energy (energy + 10)6 z/ t6 H6 n+ N9 k
]4 k- x' ]1 C0 q; _$ B7 y
ifelse show-energy?1 n: F) d( ?7 U8 s6 I+ w
[ set label energy ]
* n9 ^5 E& N) E8 H2 K [ set label "" ]
0 P& p7 o7 ?6 q ]4 x V# U% N. p) [; R- N
end
; |* s6 p, o) h* O5 n# n9 Z* ?' b3 kto reproduce5 s$ A% z, u1 |+ n! |* Q q# w
ask turtles [5 Y2 O( i$ C& I
if energy > 50 [+ i- N2 e B6 Y5 u7 W2 r
set energy energy - 50
' P% u# x/ e7 z/ T h hatch 1 [ set energy 50 ]
6 u1 [2 u: m/ I1 n& \ ]5 Z0 S o/ g! {) j( U
]: f6 s' T& J" `5 ?
end2 t, v$ a$ s% L ~( j
to check-death
9 k$ t3 ?: ~+ n* {7 a ask turtles [
. l2 I8 h1 ?, y- e% I& {- \ if energy <= 0 [ die ]
) `7 w$ ?$ n+ |3 t, D" K; W' ]4 K ]
# G4 z: M6 n9 ~/ s- a0 R2 V* B$ iend) ~. C* [/ x9 V8 @3 i- I
to regrow-grass& X1 G$ I, M9 ^1 s4 R8 D# z
ask patches [7 P7 \% d, b2 r- f4 J" s
if random 100 < 3 [ set pcolor green ]) u" V5 \: u z/ C! F
]/ l# O% S2 I7 q* H4 h" g# _: q- W
end# r2 h1 s- Y# T
to do-plots
& |; y% p; M+ Q, r set-current-plot "Totals"& _" R' X+ m# L
set-current-plot-pen "turtles"
$ \- l: u6 ~; d. K5 z plot count turtles4 X1 ? Q1 W7 U" H
set-current-plot-pen "grass" y; O) p- }& {! a) j
plot count patches with [pcolor = green]
. l1 S: G! z2 R7 send
, H, S# U# N l$ k4 B可是运行时提示no such plot: "Totals"* r0 s2 ~1 E; \& |( N- Q% C7 J* p o
error while observer running SET-CURRENT-PLOT
h0 m- G" V; L! _- x; b called by procedure DO-PLOTS
. g" [9 |- ?0 w% P called by procedure SETUP5 q8 h& C3 z4 Q& N
called by 按钮 'setup'0 n, [( ], d: h: p! s3 @, P
求大神解答啊 |