我编的程序如下turtles-own [energy]
) N4 k% R, e& a3 a) d' bto setup
# T) P* u2 G: F4 e1 ^. D clear-all0 ~7 e& h# X' X% r$ w# j# A+ F4 Q% g) Z
setup-patches* |5 W# ]! L: B: L1 c; T
create-turtles 100
+ A0 P1 y/ E L5 O$ `( d do-plots
3 Q1 P) A; _9 M) Y" P2 q ask turtles [ setxy random-xcor random-ycor ]
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to go
3 ]6 J, _0 `; ? D! W move-turtles+ F8 X" l7 N' T3 }! R$ {* l. \8 c
eat-grass1 ?+ v) U8 C, H. F$ f4 N+ E
reproduce
4 J" m' B- n+ ?( e K check-death
+ A, S, b* _9 U Z, U( [ regrow-grass
5 R; C1 F& X! E4 `4 _2 d; w5 Y9 B do-plots! F5 P# c+ l! K$ }$ y7 ~/ A
end
" ]& S4 Q& r* D0 Xto move-turtles
5 s0 L2 S2 U/ j ask turtles [
- K, H# T+ F# N- B; b1 E right random 360
. N3 J5 ~7 W' ~6 H forward 1, d p3 d# G' B, L
set energy energy - 1* _/ y6 r3 F& O0 u
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end0 p8 t7 v7 p5 ^ Q9 l
to setup-patches
4 L7 @' W/ I# L1 N! T) T6 k ask patches [ set pcolor green ]
* F7 ?2 `( h+ J# Fend+ k+ n/ K$ y- t, d9 s% F
to setup-turtles6 J- f4 r' W* G. y$ ?
create-turtles 100& F/ J) V" x0 ?! z/ l: d6 @/ p
ask turtles [ setxy random-xcor random-ycor ]
6 K' q) q- W3 h3 p' Z# hend0 [, {( W7 i7 C+ Y
to eat-grass
- p5 q% G% U( H/ m- K) T ask turtles [- \6 ] M# u* h5 K- c I" G% ~' r
if pcolor = green [/ g U$ K7 G- r- i
set pcolor black
8 a; e0 i0 `+ X9 v: r1 e! y set energy (energy + 10)( j) ~" L* n: H1 s- a
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ifelse show-energy?1 d% j9 ~1 d9 m6 ]( G$ k! T, {7 r
[ set label energy ]( [. H& l9 e) y9 l1 q
[ set label "" ]
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end
: z' g4 P0 @5 f3 `; gto reproduce* k3 a+ {$ x7 J' B5 N4 X
ask turtles [0 b8 m/ O. W5 j2 m
if energy > 50 [
, r6 i* W' _& v* r% o& H5 K set energy energy - 500 z4 ?; u* _8 P
hatch 1 [ set energy 50 ]
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]" s" K- x+ |7 ]) U% B8 T3 o+ P0 c; T
end# r. u; S6 ~, Z3 d: ^( N3 K* _2 h- N
to check-death3 O3 c8 x7 n' S- e; h" G
ask turtles [
. z! @. p. O' p/ g* M' z if energy <= 0 [ die ]
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% W0 D/ C2 h; t$ f* ~5 G2 X) dend. F0 x" p3 r4 V8 L3 e5 [
to regrow-grass! c" v" t0 Z- N/ R8 m$ g0 e
ask patches [: C& N$ R0 k; l2 G* M+ y8 Z0 G! T9 c
if random 100 < 3 [ set pcolor green ]" q- F: C( C9 t: ~5 A6 |
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end
: [/ T# i+ q$ v. `3 ]' a N: {to do-plots
3 y U9 b! F7 `& f$ l5 @ set-current-plot "Totals"
H5 \7 u: ]; {1 {! K& t. k set-current-plot-pen "turtles"9 s2 n9 @4 F4 ?7 p) S. c
plot count turtles. G% |3 {* `3 T. n t! l
set-current-plot-pen "grass"7 J# j1 L! {; F7 X8 j
plot count patches with [pcolor = green]$ ]! [' Q2 X& ?( a6 ^/ m, }
end' A; X2 @) a/ _3 t- Q1 _! Q
可是运行时提示no such plot: "Totals"
% ^% G# p: }% q! uerror while observer running SET-CURRENT-PLOT
4 i' G: I5 V; k' @ called by procedure DO-PLOTS: {" |+ h' l2 D* I- l
called by procedure SETUP
9 N* t% g+ e2 h- w+ k/ T8 S called by 按钮 'setup'% o8 ]' p- I- I
求大神解答啊 |