我编的程序如下turtles-own [energy]
& M3 J5 E: ]6 x: q V+ }to setup! @* s* N; t4 G5 x ~/ y( K
clear-all
, ^8 G& Y/ R3 {* H; K% y1 Z, n' v3 G- x3 } setup-patches8 l5 r$ V, H7 w) M; h% D
create-turtles 100; y$ Z- P5 `7 s; V
do-plots
7 m) A' R" F4 ?3 `8 Y; R' s ask turtles [ setxy random-xcor random-ycor ]
# X r4 N& y1 l' s4 Vend
9 V8 \/ S: Y6 l4 v8 [! Gto go
2 s& ~/ a. J3 f5 L9 q move-turtles7 M h7 Z. W/ G/ @3 E6 O
eat-grass* b2 M5 D6 X7 `$ |7 I1 [& q' y
reproduce- w& U- H3 c* E
check-death! X2 [! M0 V, ]! a! L
regrow-grass
% ]& s( H l2 @ do-plots$ @0 J0 z- q0 ~# M, g3 M
end; Z9 J# a; e8 L: Y& E
to move-turtles; N* P% Q& r6 D% U8 C7 H
ask turtles [
8 W8 j( F w! y5 }9 V+ F8 x7 Z right random 360
9 t( X, B9 [% s% z forward 1
- L6 A' R6 E/ K0 p set energy energy - 1
' V0 b w) ]$ [2 x7 x ]- V( c1 Z( c+ o. B
end
% e# c/ A4 m* G- ?8 T, D: Z* \. fto setup-patches
* ]/ e0 g3 \7 I+ v$ G' t) k U [ ask patches [ set pcolor green ]* n* A4 Q( Y3 A& R# a
end
' c( V2 p! c/ pto setup-turtles
# o" E8 P. F2 t! R create-turtles 100
% h9 l; X5 G# @' J ask turtles [ setxy random-xcor random-ycor ]
5 ~. @# {9 p- b+ mend% I5 [3 t& ?) N( S) `6 y
to eat-grass$ S/ z* @" q* f- F, k
ask turtles [( e5 ]* I/ p$ X, s; g* m5 H' c
if pcolor = green [
' S% P: n$ O0 f! }6 o- R& O set pcolor black9 G" i+ B% F1 q& R9 K) l- a0 Z: J
set energy (energy + 10)7 @% v I5 Z7 _/ j# B$ J
]
8 L8 x- ]* Z% _' o% x p# o4 g ifelse show-energy?
0 J3 e+ [5 U! e2 ^& c [ set label energy ]
+ o% `2 v+ z- y. [9 f' J8 y; f7 b [ set label "" ], i% b& {) f: p& V/ g% p: r* K0 {3 x
]
% G n# p5 q+ s7 x- o6 n- E+ Kend; d* b9 f1 r- o8 R* O( I; R. e. a' R
to reproduce' C/ _0 O; R: \
ask turtles [' [! e- y9 }! V8 T- H: z6 ~* i
if energy > 50 [
3 D# c8 c; w. ?% \, J; ^8 P. b6 M set energy energy - 50% v7 N% O0 s; P# z n
hatch 1 [ set energy 50 ]$ P/ C1 F! X; L! k+ Y
]1 X! r6 F! z% h
]
1 U$ k. e- |. V4 @0 d5 ]end) L. R1 {! {8 f( `4 }, j4 S
to check-death
5 M" O& ?" [% S' r% b' \ ask turtles [6 x! y0 l( k1 m( _3 _; F: g' p5 N
if energy <= 0 [ die ]
# x- M# o% R; B' Q- Z, Q ]
) Z' F' n$ i- _9 C/ Yend
. K7 Z$ h3 o: _* d2 O, |to regrow-grass5 y2 b! I6 e; o8 j% n" ?" V3 \
ask patches [4 \1 K! a) U4 l
if random 100 < 3 [ set pcolor green ]
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end+ N# b F* u+ N
to do-plots
, w, m6 k- U+ m0 F+ i6 B' L& v% O set-current-plot "Totals"/ m3 c0 F' @" I; j4 _
set-current-plot-pen "turtles"( G5 [+ M u" ? M7 T2 i0 h
plot count turtles- B0 M0 |- E% T
set-current-plot-pen "grass"- V* V7 g( @* x/ _( {" n' u, Y2 B
plot count patches with [pcolor = green]
2 f5 _! P, E) {$ q( C! Yend
3 l/ E" R. ?; T& Z可是运行时提示no such plot: "Totals"! D/ ^# ?& ?0 O/ Q) n/ R3 R- z
error while observer running SET-CURRENT-PLOT
. K+ V! U ], c! F/ ~- V, k called by procedure DO-PLOTS9 X- y q+ A7 ^6 x& y4 w$ p9 h
called by procedure SETUP
! C4 l5 E# k# `/ x( I; W+ K called by 按钮 'setup'
6 _2 x* M6 K1 w: c. F; ~求大神解答啊 |