我编的程序如下turtles-own [energy]8 M. {' r. g) |/ D; M4 J- v! z
to setup
* v. p+ j* ~9 m9 c( d clear-all9 X! [+ n3 v2 k- k
setup-patches( J5 }+ ^: e Z
create-turtles 100
T( A* n% O% @; f3 O/ Y do-plots, D. G5 g+ l, V* x9 |" B: e
ask turtles [ setxy random-xcor random-ycor ]; h6 I' q9 H X
end$ e1 O# u' R, a/ j4 l
to go
# Z) o+ E9 r4 E* ~ move-turtles
% O. ~+ `+ p. {! R+ w) | ^ eat-grass
4 F7 D. V5 _' z$ z reproduce, G) B! ~: C, r! @
check-death
n; b* \2 j9 x6 \) X) I; E regrow-grass
- g0 V i/ i/ N: m& U7 Y: S, p0 t2 Y% h do-plots" V* T, M- q# A0 Y5 A. x2 w% `
end9 N: {9 A8 b/ H5 K( W* ~
to move-turtles- x- E' N5 ~4 m, }0 Z. \
ask turtles [' r- \6 X# H3 ~; R' R! S/ T
right random 3607 S5 z9 e! h: a$ r
forward 1/ x7 o" e2 |+ B7 @# |' p
set energy energy - 1( r- J; d! [6 F" w1 h6 V9 K
]3 k+ a1 I% A; C( t7 j& d+ H
end
6 `4 A" K/ S1 v4 Q& Q( p7 Eto setup-patches& D3 `+ X! y7 t6 X: G" d
ask patches [ set pcolor green ]+ g+ y9 t6 s0 `& ~: S
end
& T0 u: \5 s' O" bto setup-turtles
o+ v$ r' f0 S create-turtles 100. M& G+ @' c' `: F9 k' L- O9 N
ask turtles [ setxy random-xcor random-ycor ]1 Z* V3 e7 x) W( g
end8 m% |3 c( G& V% k2 X7 N! P
to eat-grass
, h& e5 a( f, w ask turtles [
) x. K6 u# |) M# C# v& h) B if pcolor = green [! h. r0 p. b8 B
set pcolor black ^) U9 E7 `; R+ o3 W5 o/ t
set energy (energy + 10)5 b/ R M `: k
]
- U% E" b0 \' j! C( P ifelse show-energy?9 y5 I1 G+ C2 h" s
[ set label energy ]+ h4 _+ i r3 B% | R0 X& I
[ set label "" ]
8 }$ i* k8 @6 V) E/ z# z ]
& G8 p4 G7 E, I, x* i- Lend. k: t* w1 |2 d. a( _, N
to reproduce
% \: B/ s* k& D* d; R3 F% N ask turtles [
9 `! ^' @' h% t0 k' b8 y if energy > 50 [6 t% |( C# S8 s. D9 I R% q1 d
set energy energy - 50
4 ] e- q3 |: _- ?3 @3 e hatch 1 [ set energy 50 ], z; j1 E% j- y3 @
], n4 v( H1 F( X
]) U! F: }/ z I! c' l }0 k
end7 `9 Y% X9 p7 O9 P: p+ X
to check-death
+ l6 X. O Z5 R2 x& ^* T ask turtles [- ?$ F/ P8 C/ U/ t
if energy <= 0 [ die ]8 G, E& Y. ^0 b, V" A3 P- S3 ]
]
& c [5 X4 h0 v! ^ hend
- L- E2 J" Z; Q7 T* G8 l, Z. Xto regrow-grass3 J- w7 G* }5 t$ f
ask patches [
$ n1 U1 S( s4 e Q2 w/ w" G if random 100 < 3 [ set pcolor green ]9 t' _/ S# o3 V: |
]1 c( t b2 m$ H( e# }$ c; R
end6 C } W+ e3 r
to do-plots
* k) L0 S* U- G7 Y set-current-plot "Totals"3 d3 ~. i. q& j4 L6 W1 o( u( z
set-current-plot-pen "turtles"8 f- Y( z* M9 h7 i$ t
plot count turtles" u$ F/ B e( ~2 g8 n8 s, U: G
set-current-plot-pen "grass"
/ X* Z" ?. C# Q6 V% z, y* Z0 t plot count patches with [pcolor = green]
( r6 O' P$ z5 C0 ~end
?* Z: g; Y/ u7 `3 i3 \; i3 p" T可是运行时提示no such plot: "Totals"' ]( w) I s; X4 \+ k u( Q1 G
error while observer running SET-CURRENT-PLOT8 u, O, N8 [& N: i
called by procedure DO-PLOTS
# ~2 m7 d; c& J( u9 \" z) B called by procedure SETUP) g. [' ~$ F/ A# K5 b
called by 按钮 'setup'. t/ e8 H, }* t* S+ { O
求大神解答啊 |