我编的程序如下turtles-own [energy]2 Z+ n) N9 j# q: Y- e6 ] n" A
to setup1 B$ t2 E/ \- O5 A: J# }
clear-all1 ^. ?- J2 `- X( f d
setup-patches
! O( ]$ x4 v) S6 C* a6 {7 @9 o create-turtles 100! g1 |1 X4 z6 c8 E
do-plots
! P: ~# d5 ?4 @ ask turtles [ setxy random-xcor random-ycor ]
* }: Y5 y) ?( n+ e5 Wend
3 D2 T, S$ D2 w9 bto go; L' U: V' r6 d& S3 g1 a
move-turtles
, n2 j1 V; t$ x) C eat-grass" @4 l4 t. P0 m+ T- \/ T
reproduce' f5 X, R1 u0 f- V4 H3 K% w
check-death2 z% r4 T& e& K0 u' z9 |
regrow-grass
* t6 A- H& i. k0 m2 ?) q do-plots. R- l: D; }, \2 e( s$ n5 k5 ^
end7 z, ?2 J" y' `7 b! Z2 D. t
to move-turtles8 F+ h6 M$ a3 X$ J4 K- m
ask turtles [
- Z$ i: c6 Q+ B( q/ D right random 360
/ x9 W& P% I, W; ] forward 1
5 a5 L/ F( L" `5 I set energy energy - 1
9 m& W$ Y$ h2 u4 d- c& h! Z6 x ]* K6 ^3 G7 {* X' n
end8 @# f% T& o# X* m0 l( Q
to setup-patches6 z3 ~( P4 D" M7 x: J# V) Y" S e
ask patches [ set pcolor green ]
, \/ W/ q# e7 j( J `5 J/ E( Q6 eend$ G: ]6 W+ }- Y: J+ k
to setup-turtles; J+ Z! t4 H7 O4 N
create-turtles 100
+ s9 e6 H3 D3 S1 {4 | ask turtles [ setxy random-xcor random-ycor ]" i/ D0 i& e$ t, U1 ?
end
0 C; Y+ a- K$ l- m0 wto eat-grass" W! w2 Q! Y$ B% G
ask turtles [7 z1 G) B' F% l2 j* W4 X% h6 l
if pcolor = green [
; U) o) `- r+ O3 P9 u% D set pcolor black' X: ~4 ]* |& G$ q
set energy (energy + 10)) s% q! G/ Z# k: {8 g
]
+ A+ K) l* r+ V$ d$ w ifelse show-energy?
# G/ b3 Y' k% }# ~. A [ set label energy ]3 _2 @; }- \+ |4 j+ K
[ set label "" ]. [; ` {6 Q+ l; F |+ j- t
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end- e# I& }7 _ b3 n4 s( q
to reproduce
7 }) T" u3 n/ i* t* { ask turtles [" c) U7 d- h) w0 i
if energy > 50 [
3 L# d1 n* h% y6 s0 t# l0 S$ t. X! e set energy energy - 50- \1 ]8 b- j; Q
hatch 1 [ set energy 50 ]8 G- A/ f8 p# m# Y9 E0 k
]
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end+ I8 ]+ `' ~7 E' {! H8 `
to check-death0 w$ Z. F& C- _; \0 W9 a, t
ask turtles [6 ] R) K7 U( G, q d
if energy <= 0 [ die ]
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end' H5 V8 W/ g$ ^) F
to regrow-grass% O, b6 ?8 n/ b B y! ^4 E
ask patches [
1 G* ~" \' r- y1 v) ^ if random 100 < 3 [ set pcolor green ]
1 i9 m0 x( L# r/ y3 H' N5 V* C; c" `$ k ]* l) q, E3 m A# K8 [
end9 x0 @: I! k% u6 j& w H) G z
to do-plots
2 v- j5 t9 o% O6 n0 V: O set-current-plot "Totals"
* Z8 ~ j/ x& a/ F set-current-plot-pen "turtles"
: f8 f9 f" ?' h" R plot count turtles* p/ G5 ]0 ?7 `0 @6 w
set-current-plot-pen "grass": ?+ e$ F. n& L
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"
( d" {5 Q# V) Jerror while observer running SET-CURRENT-PLOT
0 q5 b5 [/ ?. \. ?2 \9 g! H called by procedure DO-PLOTS0 [4 @& U( G+ U0 y! M2 g# j
called by procedure SETUP' c& F0 Y; p+ T0 I
called by 按钮 'setup'6 p5 D2 R& v2 E. C! o
求大神解答啊 |