我编的程序如下turtles-own [energy]7 V1 l' c; q' j `) ?9 g$ x
to setup/ m/ j: g6 g0 i9 v+ y$ f& O
clear-all% `* S* \" {- u
setup-patches' x( U6 }; ] i$ Y$ C7 `* w6 W
create-turtles 100) l, B( ~" F9 m+ g- ]9 R
do-plots
) L: p8 F) X5 E2 g! }/ @3 a* r/ s ask turtles [ setxy random-xcor random-ycor ]& Z7 W0 ]/ U& o- ]$ N
end
; ~; F9 K2 Y# ]to go( m- [; [% z7 k- D! f2 c$ x
move-turtles+ b) ]4 {- l) A M7 ?
eat-grass! O1 V6 ?. a' Q& v' `2 d# B' ?6 m
reproduce
. k O* o' A9 g) E9 G6 v5 Q check-death; ?$ `6 A0 g0 N) |+ K9 B$ h2 `% ]
regrow-grass
: g3 j* W, E f do-plots
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to move-turtles& S! c/ I' C J' I5 _
ask turtles [+ M* a' K( s2 S% V. O" |8 F- l
right random 3603 D: P0 A$ W0 h4 m( }
forward 1+ O4 L1 ?! S, g
set energy energy - 1, @4 q; V. A9 G3 r1 O
]
* s. b: B0 ~& k# ^; Iend
4 y) C2 ]! s+ A- g) F- R. }0 Lto setup-patches5 a& x" ~& E" v7 W, N
ask patches [ set pcolor green ]
8 F3 K+ M1 ]& m% U- v4 d$ ^2 D2 J( hend
, R! a2 C9 q1 G3 W/ \to setup-turtles
5 ]' d' U% q5 p1 I0 t# @- N- \$ i# U create-turtles 100
0 {1 F1 H9 U0 w! v' ? ask turtles [ setxy random-xcor random-ycor ]$ P1 \- c4 [; E/ n* |. O e
end- C. r. l' \) h3 k6 [, o
to eat-grass
5 q+ N' I( B D. E- c& E) q ask turtles [' W7 ~" ], X6 F
if pcolor = green [; H7 w: h1 s7 u8 w7 V" x, e
set pcolor black
& Z' u- I9 ^9 G: s8 u* [* ~ u set energy (energy + 10)
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ifelse show-energy?
6 ]- ~# r2 H6 Z) u+ s$ | [ set label energy ]. i+ I: G4 k9 z6 I2 e
[ set label "" ]8 z, Z- ^! Q0 @. h. s! S! `
], T4 ~/ ]% V; q$ f4 n# b% O
end+ l, E/ w0 R5 A+ B
to reproduce7 n# o2 c m& Q" n% U' @, W. Y9 J6 l p
ask turtles [
+ U& r g3 T8 G4 I' f4 M7 s* y if energy > 50 [
( P+ ?! R+ N) [8 o2 |- W set energy energy - 50
, V P/ F- @0 Q( C2 g hatch 1 [ set energy 50 ]
* p2 ?, E @) f' I ]
3 O+ \4 e7 \8 x9 U/ }7 b ]
6 _ I+ n4 K7 G+ s+ oend1 G( o" l8 M7 O" I6 ^1 i" S6 Z& p
to check-death
U- V4 H5 S7 P/ s$ P, o9 A% } ask turtles [% U* R& C C$ ~
if energy <= 0 [ die ]
0 R" u/ Q$ y- N! G ]9 ?3 _$ _" o4 j) B* E
end
0 d6 j# {$ m6 g% a; K \to regrow-grass3 t) D2 e2 \6 X& n
ask patches [. i0 P" I6 G# `& c
if random 100 < 3 [ set pcolor green ]+ V' L: K1 Z+ E
]) v/ O; O2 V& g1 x9 O6 U/ [- V
end
" R" {# o% M8 d& @) e; D- o" `" o& oto do-plots- C. k5 j5 Y" O% s* ~$ d
set-current-plot "Totals"" t( t2 H) I: i' `) ^
set-current-plot-pen "turtles"
4 r' _8 I* L4 E% c* W! w: u( [$ o plot count turtles* C6 q" H# Z; k& a6 K/ s1 O" C
set-current-plot-pen "grass") [7 Z( \- e9 k$ x5 T$ M
plot count patches with [pcolor = green]6 D, N" u; U! P+ j
end
( ?: b+ t* v! x2 \- u可是运行时提示no such plot: "Totals"4 G: t7 b6 c: \; p
error while observer running SET-CURRENT-PLOT
/ F4 z; o& ^1 a' u called by procedure DO-PLOTS
9 d L3 u3 E4 o* v9 r0 H3 U; F @ called by procedure SETUP* [: L2 G9 ?" g
called by 按钮 'setup'
9 D0 Z' M- c* O, G3 z5 m求大神解答啊 |