我编的程序如下turtles-own [energy]
b/ p( ^: [2 hto setup3 v5 A i! Y: c
clear-all4 `, }, e5 \) I: a! j
setup-patches7 k8 v6 J6 O. Y; M
create-turtles 100 Z7 \# }7 I, G3 t( {- |4 u% I
do-plots* e) l) Q( s8 `0 e5 v
ask turtles [ setxy random-xcor random-ycor ]
: q/ @' P0 s' C! Wend
$ k* Q1 f6 f3 y8 pto go, E5 b- {! s8 u. w' B# i
move-turtles8 E6 d+ Z, t, ]% T
eat-grass
) l, k) N; x& m( y4 z reproduce
4 }4 ~0 W- d y; K1 F% b check-death% o; [! R& n- E/ P1 w
regrow-grass* Y h; {7 @6 z: m- f# \
do-plots Q( f, c' F" O8 F6 T; ?$ @* X7 ?
end
/ Q) O% g; e z) Ato move-turtles
, ?( u7 e& [, E# D k4 @ ask turtles [4 S# l/ V+ w. ~: a4 n" L) @% f8 Q
right random 360. u* h/ W# J C4 c- P# J3 n
forward 16 W9 v' n8 a0 v. u
set energy energy - 1
7 D9 D4 Q0 b4 m1 B ]
$ G; @. u! T2 N% Oend
) e6 ^3 b- s8 B9 v# Pto setup-patches
% B5 y! @" B+ X( P ask patches [ set pcolor green ]/ [* ^ f0 K# p+ U- P+ R3 a$ t
end1 A; b9 L* G' [9 s5 `6 n
to setup-turtles8 _$ ~3 Z* w" T x7 a. Y- u4 C
create-turtles 100
/ H6 }- p% k' l2 m8 `5 P ask turtles [ setxy random-xcor random-ycor ]
) F' ]4 U% F. Z0 H; |' vend
2 ^/ w* q j$ E1 ]0 Dto eat-grass
5 U: a6 v2 @, U' E- M ask turtles [
" t9 {; i( K+ ~- q6 v- Z4 s if pcolor = green [
! }/ {& V, M6 V! `) H$ b8 B set pcolor black
5 Z6 }, V' s) ?8 B" l set energy (energy + 10), O9 o( k0 T. T! F/ J A5 B
]8 k7 i; J% W9 ?2 i L, q9 ]3 p
ifelse show-energy?
: {# s7 V+ U) ] [ set label energy ]% F/ q6 d/ T- z& j1 R
[ set label "" ]/ X0 C8 y4 A. ?" O
]% o& `9 [ S4 b% q4 K
end
9 l1 F+ v- C1 B8 \to reproduce- r2 \$ E+ ^+ i5 x( J' h2 e+ H. d7 U
ask turtles [# I* r. i# g4 r7 L
if energy > 50 [
( J) a5 ?$ m& w, y: V set energy energy - 50
; M0 B/ j% W3 r! O8 j8 G7 ? [ hatch 1 [ set energy 50 ]
- V" ]6 K/ J8 C4 i/ x ]
% g" {3 ^1 a: g' N" A1 t+ o ]- a6 f% T/ k B/ M0 q
end& C, A$ m3 o0 ?. U' E7 X
to check-death
+ _+ p; e R9 C ask turtles [. ?4 Y# r' }3 _6 X: s) b k
if energy <= 0 [ die ]
4 w$ m4 T( q: A: Q4 W" e ]0 O5 {* e6 L8 A, O) H
end7 Q- J2 B$ a, \
to regrow-grass# S8 E9 [4 z1 T* u) t7 r
ask patches [
# M7 e5 r* {. d' W. I if random 100 < 3 [ set pcolor green ]! z9 W7 U9 B0 g W( P
]
, w, |8 o+ h; b) n- F- send
- L" r% d! u/ w- J0 R' P5 H7 kto do-plots
$ e1 o$ w3 P ~% j+ O: r6 m set-current-plot "Totals"
, V5 _* `( \7 Z/ ^. F5 o set-current-plot-pen "turtles"
" j/ F# {" a8 T plot count turtles6 I; n+ X- \$ i2 G* X
set-current-plot-pen "grass"
+ ^9 S& H- S6 R; V8 G' b, R: L4 j plot count patches with [pcolor = green]
# m, ]/ {$ d0 l. zend9 } \+ M' {( y" r" ~ p- R
可是运行时提示no such plot: "Totals"# C+ y. A; H3 i; H" _
error while observer running SET-CURRENT-PLOT
" w4 @ v( d4 y c8 w6 R( ^ called by procedure DO-PLOTS8 h3 W& m6 o9 a9 r$ X
called by procedure SETUP, ?: ? U h* ~* ~
called by 按钮 'setup') k+ \5 G- C9 w6 [5 w: j) I4 [+ i
求大神解答啊 |