我编的程序如下turtles-own [energy]. r/ _# M1 `# K
to setup: s, G# @! X# P( R
clear-all
* e& a6 z2 q0 ~- L7 ] setup-patches
; I# u+ E1 }9 b% _ create-turtles 100
; F; K8 Y. } \: {6 ~ do-plots- k5 T- q6 r2 m2 u
ask turtles [ setxy random-xcor random-ycor ]
! n" V; Q+ ^5 Hend
. Y$ N/ X% D6 ^9 N, zto go
$ h- c s e+ w; Q4 E5 j% @ move-turtles8 `) z0 p, C; n! c3 Y
eat-grass
, V0 }/ g6 n/ E6 `5 `( b6 j reproduce
* L% B( z3 S* v+ d check-death
9 A4 y8 M) x, J. j; J {; D regrow-grass
( z- r3 }( _6 S! n8 Q! e4 f2 k8 Y do-plots* r1 e) [( z; q S( o7 C. b% z
end# ?; b3 ^7 w8 Q D
to move-turtles) j, `# ~3 s) C9 @6 c0 [
ask turtles [1 L' b' V, d, z& v
right random 3608 L& `! _7 I8 n! X
forward 1; ~; ]5 `6 a- j7 L6 f" f
set energy energy - 1
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end
5 ~' [% i) ]" o X6 ]! ^to setup-patches9 A) y0 h1 q, V
ask patches [ set pcolor green ], L9 t1 ?: H! _6 h
end5 T( @ Z! `$ _3 H- w& C$ l
to setup-turtles# [ X( N: Y2 x! p4 O/ C
create-turtles 100
: F3 U- s8 n9 u+ R$ Q) ] ask turtles [ setxy random-xcor random-ycor ]
/ w9 h7 N) x) f# Wend
7 S& G' o+ e" I) i8 a! ~3 oto eat-grass
. p0 J) T; \! P5 x% I ask turtles [% \! R1 X% j0 {( j0 u! f- A
if pcolor = green [/ W/ k5 R8 G3 \ u! ~
set pcolor black3 y, U& `) T1 {& _* q; E
set energy (energy + 10)
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ifelse show-energy?* ?5 s9 [; i# x% K& c( w/ I) l
[ set label energy ]: `3 g4 {: R# q
[ set label "" ]
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end
, p! M$ j& @0 B( ?: `4 @1 Y/ Fto reproduce+ Y2 b; E/ h) z* D% K7 w
ask turtles [
0 A+ S6 \; l2 d, i# m if energy > 50 [4 d8 T, F9 x( n. R, g) [+ g( ~
set energy energy - 50
9 F5 n- @" {1 N6 \- n6 j" x6 b hatch 1 [ set energy 50 ]6 `+ ]" N, G1 D5 J7 T% J* |
]
% L: e' ~6 I4 e( g ]
1 H4 t. b5 V9 Z0 c+ H( O5 Dend5 L- {" j* l7 i7 X* J7 I% p# e; _
to check-death
G* t t" i( m ask turtles [
1 n/ L. b) q) w$ A# l/ Q) J+ h* C if energy <= 0 [ die ]
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end
) J9 m$ k4 t# o' G6 U/ Vto regrow-grass# L% {( R0 ?+ A9 {& j
ask patches [
9 p( |9 j8 ^: p: }3 k# [1 I if random 100 < 3 [ set pcolor green ]
6 G3 h1 Y8 m: U4 q: e, i ]
8 d5 s: w( W/ c2 E+ I/ Y& aend
9 {+ t2 [1 ?& F! p5 t4 wto do-plots$ d2 Q1 c# W3 X% F& w
set-current-plot "Totals"
# N6 h1 i2 F0 k4 Q- H- c3 H: k set-current-plot-pen "turtles"
4 o! R! l# P7 e% d- G; a J5 U plot count turtles
. l' M+ D0 z% e3 i, [9 _/ o set-current-plot-pen "grass": Z% G l# I$ ]3 }, c
plot count patches with [pcolor = green]
: @- ~0 c2 U1 d. ^end
8 L2 ?6 x) T; k+ f: x+ }可是运行时提示no such plot: "Totals"6 T9 B5 |' h( z; S$ V' x* E
error while observer running SET-CURRENT-PLOT$ Z- [ r) R8 Z
called by procedure DO-PLOTS
( r/ R0 u8 A/ t2 p' K# b9 ]0 Y% r" O. M called by procedure SETUP
. q z# x' F- E. |, C& E called by 按钮 'setup'
0 t/ X1 S; }3 R7 a& p求大神解答啊 |