我编的程序如下turtles-own [energy]
- A. @# o: D0 l# r0 y) E% sto setup( v3 W# ]7 s3 h2 ]
clear-all: Q5 A3 v! n% {; t) U
setup-patches& \" l7 p; m4 |) k% {: u3 F
create-turtles 1008 c' i' |* C2 ` o& d. B1 l
do-plots
% j8 {/ v5 n# s! e, `' V ask turtles [ setxy random-xcor random-ycor ]) {3 d0 C( P o l& e3 t c$ r& G
end3 |9 q! y; u$ H% `1 p$ b9 X
to go
, D3 A# x) m) Y1 A7 K move-turtles
$ Y9 E s# I2 u) N eat-grass6 {$ `# n% r) x. |* M& D0 J
reproduce
& m3 b- G% ]& L d0 { check-death
' o7 |- V: K; G, Y regrow-grass9 i* q2 q" `' B
do-plots( a3 D/ ^6 o9 g3 i* w* i- T3 V7 L
end1 h G+ I! Q) e! i/ S
to move-turtles
8 x. n, C* R, h' W; f/ Q: X ask turtles [) y* Q* f8 N& _% A; K* U
right random 360- L8 R+ y* ~& n1 S4 D
forward 1, j. ^) L4 ^2 W A4 R
set energy energy - 1
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end% j0 a' L4 s$ i) ?% v- P
to setup-patches
0 M5 u2 u8 i: _8 P- d0 ]6 G, i ask patches [ set pcolor green ]
! l4 o5 t: J% }* t4 B4 g, Jend
, c- o- z3 t& L7 }) @6 Cto setup-turtles8 ?; Y" U* D8 G W6 k
create-turtles 100, U6 _- N4 P K4 o# h9 G
ask turtles [ setxy random-xcor random-ycor ]* e$ f6 V# U+ b3 e4 d3 A
end" Q* [' Z# c" ~( E+ j
to eat-grass
6 f. r* D+ z# H# @' ], h( `1 x ask turtles [, P0 Q; S5 B0 i5 \/ c
if pcolor = green [
; M, z6 N# b% |) }4 y; F$ k; S set pcolor black* Z( c8 e3 d7 Z
set energy (energy + 10)
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J1 d0 t2 E* v1 E+ f, _" [- Z ifelse show-energy?
6 c# V' p& t- ~# i+ k [ set label energy ]/ j# X* S0 e$ f) h! u8 v: k; k& _
[ set label "" ]
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( A5 [9 K, S) ^end4 }/ ?) F7 _' f5 V* B3 P6 s
to reproduce! o. n" ~# z. \( l. b
ask turtles [
C% K. C1 |4 Z0 }: k) z3 O if energy > 50 [
. I9 P8 Y( M+ X. r: m set energy energy - 50$ l/ k- I A* k0 V
hatch 1 [ set energy 50 ]
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end
' m1 r G3 a7 u9 _; kto check-death
6 Z7 ?* a; U' q+ c2 F9 a ask turtles [) m- S2 Z5 M0 L# o* W2 |
if energy <= 0 [ die ]& w/ f* K% G- T8 d7 d2 Y
]9 F u0 K- D( P0 S
end
" m& f7 q0 C1 Q, F; u wto regrow-grass. |1 w2 w, J4 R! r( n. J8 m g# x% u
ask patches [- u7 G8 W. J3 s- O
if random 100 < 3 [ set pcolor green ]
$ k% f; C; t5 c& N3 h! o ]
* \: o7 a$ l1 d( y5 q, m) _end
1 s" n/ V' O: Lto do-plots& l# S- M6 V' |5 W
set-current-plot "Totals"/ z. K% v8 ^5 X- s" m9 _
set-current-plot-pen "turtles"
1 f- J3 O9 s0 `% W plot count turtles
) B. s4 Z! J: P5 q7 A) ? set-current-plot-pen "grass"/ R* d! b, `1 `1 \0 M4 d0 l
plot count patches with [pcolor = green]
, X3 ^* Y4 g D0 d% n/ {end3 q; h' x) B0 T, {$ @5 b
可是运行时提示no such plot: "Totals"
. J2 P! x7 c. V# u2 B& j% Terror while observer running SET-CURRENT-PLOT
6 t$ ?* \- ]7 }) Z T: `, R called by procedure DO-PLOTS! S2 r' O# X1 _4 n
called by procedure SETUP
* S( d# ?$ t9 ~/ Z called by 按钮 'setup'
5 m9 N1 F( ^" D2 P4 h- N求大神解答啊 |