我编的程序如下turtles-own [energy]6 B- _' [$ U1 ?- \- l
to setup# Y- |* _6 V) ^: K
clear-all
0 O2 z8 {; m l1 b2 I3 A3 a1 `+ H7 C setup-patches
g S- H. x' e' b- F9 c1 ] create-turtles 100; G3 o# s9 H3 V- ~( h
do-plots' z- ~- W# g! A( Q% }: @
ask turtles [ setxy random-xcor random-ycor ]: G& `; R3 R) L3 R9 \3 a
end3 P8 O; @! a6 C8 g0 Y9 R# y
to go
% g- p3 N+ H" S) Z move-turtles
; w5 l: [* z. Y* W1 J eat-grass _3 Y) R" I7 d2 C, f
reproduce% ]; R# D a! c( M* W+ m
check-death
3 E& R2 o3 S$ e6 U+ H. C regrow-grass- W9 @3 }: ^6 A* A7 J- `
do-plots7 I; t5 m8 P4 ~0 j0 { w
end
% l( X1 X9 U0 u9 C7 K4 k& p5 N3 ~to move-turtles( R" f4 i3 l2 u6 g9 y, B# S
ask turtles [! {7 i3 R! ?2 z- U. @' ^- r
right random 360
: S8 g* m! K, D# x1 K4 K# b, G forward 1* ~9 \: J5 H0 R+ i7 C
set energy energy - 1& `& }3 j- T Q Y4 H- `& T" R9 ^* [
]
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to setup-patches* `- i# b3 ?& o2 D* q
ask patches [ set pcolor green ]2 u" {* Y* ?. C
end
" \0 G& ^8 m; H5 M, C# s# }to setup-turtles
/ q# i( C) t J) H create-turtles 100' V% m( b( w+ c2 ^+ D6 \
ask turtles [ setxy random-xcor random-ycor ]+ \& Y: v% J V# V; H. g( ~" Q5 n7 e
end
1 _0 y8 t/ X& e8 j- b% Wto eat-grass8 n9 B( g" ?% }& a) v w: H2 ^1 I
ask turtles [1 ]' e: [3 N5 N3 R; Q9 k# m! d$ C
if pcolor = green [" s9 N* d3 O7 {5 A& }6 r: m
set pcolor black
1 _( W W- O5 F# Y set energy (energy + 10)& r0 N: Z: Z! p4 S1 }# L" h
]& W v+ ^0 f0 z# q
ifelse show-energy?4 ?# G$ w$ g4 ]+ J; x# {
[ set label energy ]1 [% ^, x7 j& t# E. G9 S9 k
[ set label "" ]
6 ~3 }$ g& v8 g% n/ n ]
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to reproduce4 q$ Y" A4 s9 V1 x# @1 z
ask turtles [
' S: [9 \- [" y if energy > 50 [7 w+ l" M8 T% ]; P
set energy energy - 50
4 W( ]9 a: [7 o* M9 K' V) M9 @- [6 X hatch 1 [ set energy 50 ]; [# R. d+ q& l# u. O5 D. l/ l: @' U
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]
2 p" Q% o% _+ R: P& F( rend0 Q6 m! s; v1 |, L. b% h6 @
to check-death
9 I8 s' R6 t1 J+ s9 n3 q/ q ask turtles [' `: M9 h% v% D2 v1 X
if energy <= 0 [ die ]
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end
i) F, m1 |6 A3 S' g3 Mto regrow-grass$ y9 P0 l8 T6 V( r0 ~6 ~! t
ask patches [/ [2 E7 K% `* _: _# a0 y8 z
if random 100 < 3 [ set pcolor green ]' M5 @: }3 T4 p+ W1 S' C. B( r
]9 W* x7 o! b1 a% V. S H# r" X- x& o
end
+ o# f1 V5 X1 n0 `2 m! yto do-plots2 k# t: v% P: P% f& Y. P
set-current-plot "Totals"$ ^# l5 m8 m8 i- l, A
set-current-plot-pen "turtles"
( R4 B$ z" v. w plot count turtles" [* u+ q0 i2 d8 i. a; I
set-current-plot-pen "grass"
# u9 m& U8 S4 P" w0 o7 Y plot count patches with [pcolor = green]* Z: R5 L3 G) i) e$ @
end
) S9 Z8 f; d0 C( [! C8 W可是运行时提示no such plot: "Totals"/ }2 V# r! J" e2 B
error while observer running SET-CURRENT-PLOT
, N& v3 Y/ t& h# A1 u3 ~6 ^# k called by procedure DO-PLOTS5 x5 ?- `% X0 T- a: ~2 H7 h7 E n
called by procedure SETUP0 o2 ]* P A8 j p( o
called by 按钮 'setup'
3 e0 C, Q9 _1 R! h求大神解答啊 |