我编的程序如下turtles-own [energy]2 Y- p) o c3 O- A
to setup1 }/ e+ P" l. e5 O I- f
clear-all% I; p6 ? Y. D) N
setup-patches
* w! d# A# _% _; \4 z3 [4 t1 @8 e create-turtles 100
8 A& D0 _* H1 I! ~ do-plots) m: g2 H/ X2 ~ | T# q. b
ask turtles [ setxy random-xcor random-ycor ]1 b v& p) N% @( A
end7 a8 J) x, Q0 j! m
to go" g: u0 O8 t5 s. e$ v+ d
move-turtles1 L) }. ~3 C. |' v/ u, |0 `: P y
eat-grass
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check-death( L7 T. S* A2 j0 L) z' v
regrow-grass
. C! l7 c4 N* r* v6 P3 R2 T. ] do-plots9 T" Q" Z5 M1 ?; s
end
) b, r: b$ f2 v, A/ hto move-turtles9 N( v5 \& s, [5 e2 C" e6 p
ask turtles [
4 F! ^# ]4 q+ O7 Z6 g right random 360
1 J5 s: O( L% d forward 1# L1 C" u2 U4 j, k
set energy energy - 1
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4 v' P3 ]2 ] r8 @9 @end, _: u1 N3 J8 S+ `+ p
to setup-patches$ |" U/ V) D. G) W. H
ask patches [ set pcolor green ]
s/ S' K* G) S* v9 qend! o' T( E; z, j1 R
to setup-turtles
; ~" k# Z0 y4 f) ^+ G+ K% j create-turtles 100! w- u1 _4 X4 U" i
ask turtles [ setxy random-xcor random-ycor ]2 P( I" m* t& m
end3 M' \6 w5 Q ]. x! p* U& y
to eat-grass
* }# n. |* t, ]7 t. e; G ask turtles [$ E/ a7 ]3 b# i' T3 }+ ~& U' k3 Y9 X) w
if pcolor = green [$ T3 ?/ t7 J8 i( A0 H. G& u
set pcolor black
P2 ~. h% c8 q set energy (energy + 10)
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% Q: D8 d" C2 [& c! [ ifelse show-energy?. N" f: E, f1 C- m7 I: y
[ set label energy ]
/ M* I# x8 n% v6 p# c" x" B/ |: R [ set label "" ]% b! @' d. F0 E1 C v- b- [
]
\! C. U, a$ |1 \/ Wend
/ H; N* G# I4 I% o3 _to reproduce
0 B, Z3 L0 F+ P( w ask turtles [
3 j9 K1 q9 J$ x1 k9 K if energy > 50 [
# M( c5 S0 a. V% x& S K set energy energy - 50* h8 O1 ~' w8 a' J7 W) O
hatch 1 [ set energy 50 ]* ?. Q5 ?4 T& F! V! j, m* {! C. c
]
# S- C1 I1 K6 v( m" t ]
8 |; q9 a1 \3 q6 I5 vend- R4 @% I3 g& P; o, C
to check-death I) ^* R/ U5 k
ask turtles [6 W/ T7 G& ?1 s. X$ a* `; R
if energy <= 0 [ die ]! I _/ L: c& {6 t" i3 H; g
]4 p6 k& F9 }$ \6 f3 r
end/ s( `) e5 }+ k- y6 N
to regrow-grass/ F. W2 w% S4 D
ask patches [
: v6 o s, ?7 Q2 Z if random 100 < 3 [ set pcolor green ]* h& g9 C( | L F/ k' K
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end
\6 O' [7 W8 p2 \9 s9 nto do-plots4 G* a6 u8 Y) X, d% Y+ g2 y
set-current-plot "Totals"; D' d2 M3 g" s# d. l0 ^* k& w
set-current-plot-pen "turtles"
* Y; [! P, P2 x0 r! v- \ plot count turtles
: S6 G& Y5 V. T* R" O% S, W2 } set-current-plot-pen "grass"
9 l: u) S Y7 K9 ?4 k- {# n plot count patches with [pcolor = green]
3 c4 H/ v5 t/ H. \6 u% C* qend$ M' o& b. I1 x8 L+ v$ N9 r
可是运行时提示no such plot: "Totals"
. X! V1 T+ V. r9 ~. a2 Zerror while observer running SET-CURRENT-PLOT' b# Y, W0 A3 Z- {
called by procedure DO-PLOTS% ~' ?7 }! c+ z% ?$ I
called by procedure SETUP+ M* [% {1 W, K1 l0 w
called by 按钮 'setup'
@3 s8 K4 K+ G. k* Q1 m" q9 l求大神解答啊 |