我编的程序如下turtles-own [energy]
. }( x- g4 [$ g: W* V, Z& Cto setup
, _' b* v& U2 N; n clear-all' i2 g8 @) J7 F' E. V3 C
setup-patches
6 H9 w$ E0 x# c create-turtles 100
% S' {) v a4 u& n! T/ i do-plots
2 W0 T% ~% m5 x" e: v* N4 J ask turtles [ setxy random-xcor random-ycor ]6 W4 a. M0 a5 b) [8 \, \% ^
end5 h4 d. A/ i1 |$ m2 ]
to go
?- ?" P3 a+ `8 m/ ]5 f move-turtles( ^( G4 J7 u# r9 n
eat-grass
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check-death8 c8 \* |7 I1 R5 f
regrow-grass7 N- [) Q7 y4 g% ^0 d, X
do-plots
! T6 a- O* C6 @5 j* `; Pend
/ @0 W) p+ q4 `: }7 Nto move-turtles
/ P1 M1 |( h: ]" S* O1 D$ y, F C C ask turtles [
7 s3 J. n# B0 I right random 360, s4 @0 _* O1 @$ u1 l6 p
forward 1
4 B/ x$ Y! N! Z/ k X set energy energy - 1- ~" U1 ~0 b; ]4 ~+ Q( d
], P p# {; A" F/ N! r5 {
end
) \8 l: U& d+ Q, g9 p0 ^to setup-patches1 o5 y. u: K: B" \4 D. ]; H1 r
ask patches [ set pcolor green ]5 C" {( b! m" x
end
* u# d m; J$ L: Vto setup-turtles( h F( X5 `7 n1 b
create-turtles 100 e$ Q6 I/ r' Q
ask turtles [ setxy random-xcor random-ycor ]9 H2 q) N5 t/ Y2 N) h
end
+ e' h! ~% Y( A jto eat-grass3 X6 e6 X$ M% @5 z- b- B
ask turtles [* X: K* ~4 \+ x4 Y6 x# p$ I d
if pcolor = green [; m, q- a8 b8 P
set pcolor black
& e, u. s/ ?8 m8 B m$ }- ^+ I set energy (energy + 10)
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ifelse show-energy?
0 ~ d2 {) B' \ Y8 w [ set label energy ]
+ @- S L/ } `0 T [ set label "" ]0 U% t3 g2 {: ^ ]' s
]3 I% D! j' S' U( }% V
end0 |% V5 d- b5 h* R% p$ W I
to reproduce
' d) J7 C- i w3 h" U4 M% a ask turtles [8 E# q* o) _- N8 B0 `/ K! W- O; c$ B
if energy > 50 [
u% y' k! r/ ?. {7 j2 B set energy energy - 50 H3 k. i3 x, R) k7 s
hatch 1 [ set energy 50 ]
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8 a+ E( Z8 d" P" O/ M. E: h' F ]! @6 r- S6 U7 O! K: K" e
end! Z$ W+ T, y; F# i% J0 g/ ~8 [
to check-death
- i1 B9 _' e4 M: |8 t* U( b5 } ask turtles [
" g. B/ f5 o8 W+ k3 O, w if energy <= 0 [ die ]5 U* f- m* U) D, N% q) v
], [5 \4 W2 t' ]6 o
end
; F. }( y p; K5 {0 ?) I) ~, \to regrow-grass
; c5 L6 x0 a9 f) D2 x0 x ask patches [
5 } |- E. y0 \: \' u if random 100 < 3 [ set pcolor green ]
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end
' z7 Q' ]# t, U8 Oto do-plots
. K& K2 R1 Z$ O) ^5 c# j set-current-plot "Totals"- h" I) q8 [2 B v7 @* Z( Z
set-current-plot-pen "turtles"
. e+ u: A, j( q% A; ~ plot count turtles% k/ G. C8 t% ~& D2 X
set-current-plot-pen "grass"" P9 |( k3 a" Y3 Y5 H! y
plot count patches with [pcolor = green]
# D4 A, n+ D6 e: r3 g Yend# b" _3 t8 D4 M8 ?: C$ J
可是运行时提示no such plot: "Totals" b" h. b2 i Q( H
error while observer running SET-CURRENT-PLOT
1 M J: z, ~) `( r1 d+ U' W3 [) c called by procedure DO-PLOTS; t2 n: |. V% }: z
called by procedure SETUP- y/ D+ G' w1 `5 d9 V+ w* S
called by 按钮 'setup'
' [7 j$ p8 G3 M/ T求大神解答啊 |