我编的程序如下turtles-own [energy]
7 ~$ u0 k! y7 N2 U, H' ^- ato setup2 t7 s2 v- I6 i
clear-all
. o2 T5 U& } a' o: A- ^ setup-patches. n+ S8 B( x, O& U9 {4 D( u* b
create-turtles 1001 e/ L3 F+ @* u& q; B: i" d& L
do-plots7 l2 P, v# v+ _$ Y9 ^
ask turtles [ setxy random-xcor random-ycor ]
% w N& k+ j+ n6 }9 A6 i! `end! [ T0 ]; O% f" T9 O- a7 [
to go/ S0 d# D5 |/ r
move-turtles
' V3 ?! E1 t8 J c7 x* G) _& v4 r eat-grass# c( j! x1 S; S2 p: z- x$ s
reproduce# @" y5 x' L! b7 W0 j; |6 G" w
check-death' @, h) p$ |+ A4 J3 }
regrow-grass
8 |/ a. a3 d7 a/ q; a \5 X g do-plots3 G. F$ V6 R* S8 Z
end
, T; p- C- B6 j$ w, u" G; ~6 g6 qto move-turtles& Z. n* R: `4 r) U" }1 j8 ]
ask turtles [
8 k+ P* P% S& E right random 3603 r4 B( h& t$ m' j" G2 C
forward 18 w+ I- m! z4 ~( e2 K$ L
set energy energy - 1. C8 H" b# b$ n% n2 t! y+ z
]
: h& U: x. f# I Oend! |( _0 H' e& K) T4 M. Z8 o; @0 H
to setup-patches( c, R% M1 z/ z O& {. M4 L
ask patches [ set pcolor green ]& \& e; v Y p( T& z+ S) D( z
end
" r- _$ ~" A; l* F9 pto setup-turtles- o: j, m2 ~+ C7 a
create-turtles 100
7 K5 A* \* P7 p% o: x! E @ ask turtles [ setxy random-xcor random-ycor ]
$ f+ S1 T; ~9 {$ gend) Y- }. ~$ \% f3 f. e& L# I& k5 M
to eat-grass4 u/ R. @6 m/ l# ^9 K+ Z. c1 [
ask turtles [
" o/ h9 \' C5 D4 U, g if pcolor = green [9 X, `0 f7 f" U8 w' \: l
set pcolor black
' ~0 ? f3 B2 d, T+ g- h; V set energy (energy + 10)
' {9 U& F# K" k& S; i8 y ]
3 V/ t4 T$ a5 r( } ifelse show-energy?
, e! l5 g4 I, u6 |0 l6 m [ set label energy ]* |( w' [; @& k( T
[ set label "" ]
" z* R! N/ s/ C1 v2 Z. N* y1 F) e3 A* O ]
! H1 u7 m: x: Y: Jend* Z: H6 e% N, {) b1 N1 O. f% _
to reproduce
; o, m* q8 R9 K6 Q9 | ask turtles [9 B, l l) f C B* L
if energy > 50 [1 Q+ G/ b9 U' C7 A
set energy energy - 50! [/ R' b4 m$ \! N
hatch 1 [ set energy 50 ]
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]
* y- X% d1 B/ dend
- p* F) ^+ v# }6 f3 Q) @* y- D, Vto check-death/ J5 u% L# J( J, i1 c0 V# V* f
ask turtles [8 j! {0 v# D& b6 j) X# o, X
if energy <= 0 [ die ]
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end
4 q i* n. T: _1 Q8 i; q2 r7 q# e+ Lto regrow-grass
$ D. D! Q% \' r4 L9 P ask patches [9 J( h+ J* l$ t) _1 J( v' y- Y
if random 100 < 3 [ set pcolor green ]% z$ O7 B8 w4 u, l i( p# n
]
3 r3 f+ u) j$ P3 ]! W, xend
$ P7 ~2 \; g9 gto do-plots4 g* d% F* S! {7 I/ F, _1 K
set-current-plot "Totals"5 V4 D$ `8 |' l
set-current-plot-pen "turtles"+ b; u, I& [* M3 j% v8 Y
plot count turtles* i B- v7 x k$ q9 O% t5 _2 M7 h# @4 ]
set-current-plot-pen "grass"4 C# Y2 \5 I. \! x" {4 ^2 ^ K% W
plot count patches with [pcolor = green]; u& A) c6 Z. ]: L. E2 k# T
end8 M% R" A7 i9 r* R+ ~
可是运行时提示no such plot: "Totals"
0 U3 D0 v& ^" ^error while observer running SET-CURRENT-PLOT
' P+ {! N, x2 D3 a+ S; Y called by procedure DO-PLOTS
. Y0 ~; n% `$ x% I called by procedure SETUP
% U# U3 C2 [& K" e called by 按钮 'setup'$ j! o( i( b+ e8 N5 B$ s
求大神解答啊 |