我编的程序如下turtles-own [energy]
7 w* f! H* G, Q) \4 qto setup
; \" c1 x; P/ R+ k3 E5 V9 q clear-all
# b% a0 q2 j) t: k' d setup-patches! c3 A* W# O' l6 }
create-turtles 100+ X/ v3 y; V- B4 C0 H3 j' N" z
do-plots
9 C, q. h; o2 i* w ask turtles [ setxy random-xcor random-ycor ]
, f+ t* U* e: M( ^end
+ \+ [2 G; P! W. q4 o* c+ mto go
L; i$ ?, d6 H, D1 j6 M" \2 h8 _ move-turtles% e$ U; J6 j( M
eat-grass
$ F% s6 i! s. ~& b( N reproduce
8 q+ Z9 }% e A# Q0 \ check-death# [0 m" ^& `7 }! i7 d
regrow-grass. n4 Q6 O4 F* a1 ?: l1 F0 ]
do-plots2 e; z. _3 w: `9 x- e. h9 z% ^
end. [( e4 P! n/ w6 C* D+ H
to move-turtles) y' M. B; Q. I. B4 ^2 v# p
ask turtles [
* e1 z; @2 p; l$ O* U right random 360- m9 C1 Q& `; A* i5 b
forward 14 s+ u9 C: A( H G5 e Z. W( l
set energy energy - 1
: y! ^% C7 T2 L1 { ]2 l) C }* Y7 G# L
end/ r7 M7 F' ?$ p' `& }! \1 ^
to setup-patches
* j0 P! [4 r# l( c3 ~3 e/ [ ask patches [ set pcolor green ]) s. N9 J' V( }& n, v, a
end
" ~+ ?& v8 O6 d7 T: n" Oto setup-turtles4 m; i9 t; A$ i+ E6 g; m+ P5 m
create-turtles 100( G7 o7 P4 n" ]" Q8 u6 m
ask turtles [ setxy random-xcor random-ycor ]# a, ~3 ~1 y( b2 i
end
6 `* z6 f9 A Fto eat-grass& o6 V$ v0 u0 P1 r9 @& i
ask turtles [* z) x l3 t. ?
if pcolor = green [
7 j8 K- ~2 _5 G A# a/ b+ H0 O set pcolor black
# z" Y4 `" ~7 W- z( ] G% a set energy (energy + 10)
0 L# |; X2 o# f ]
" `# j* W! e# N3 {! x7 B8 u ifelse show-energy?9 Q% r8 J: J+ }. ~; O0 }* S
[ set label energy ]
" J; s. C8 K V [ set label "" ]
, r z/ J3 ^' J! ~* ]& F5 x b0 f$ ^ ]
) A# x$ \" v* p' X7 K9 eend) E. ?( V0 B( C2 O
to reproduce% X( W8 N) K. C0 m2 d, \5 h
ask turtles [3 ^; g# B6 s5 T8 |4 s$ _3 a
if energy > 50 [
0 f/ e6 \) b# G0 D2 K5 l$ ~2 L set energy energy - 50; V$ Z ?+ b6 e0 }1 H" P
hatch 1 [ set energy 50 ]
6 H* n1 X' {: e6 ^1 p5 ] ]
* M4 R3 H0 }! b- M# M4 u ]& R# ^# o% y4 o' @. }4 I
end
( {7 `7 C8 M" L% C3 Pto check-death6 D7 I" p5 a/ ]* K
ask turtles [
: P# ~5 r6 d, y, ^) Y/ X d if energy <= 0 [ die ]/ F) [* ^/ c; ^1 V
]
0 q0 O$ q/ @, o8 c2 N5 N2 Send
2 M2 y* J/ [5 t) ^to regrow-grass
0 g3 F8 Z, H* [! V5 M$ q* I/ X ask patches [. c+ ~1 v- w% l" ^# J4 v
if random 100 < 3 [ set pcolor green ]
. q+ P* q0 {+ Y! t- l: H ]' o2 E( W- J. P: r: X* \: y
end+ V' g8 O! D0 Q+ e
to do-plots
& j4 z) e+ q( l' ]0 h# v9 f set-current-plot "Totals"3 z5 ]* Y" d* J! l6 I
set-current-plot-pen "turtles": y/ t: a0 o5 D j) t
plot count turtles. \( w; Q3 t M
set-current-plot-pen "grass": B R# S2 y3 K& f
plot count patches with [pcolor = green]
$ m4 D/ H. U0 [0 }end
% r! c2 [' ]- X. z( e; ^可是运行时提示no such plot: "Totals"
, o8 H n7 J2 Q, P2 n+ `& F* Verror while observer running SET-CURRENT-PLOT
9 _9 ^0 ?9 V! M; L' @8 c: q called by procedure DO-PLOTS
" R5 e2 |3 V" ~! t! Q. A called by procedure SETUP
* l" I* g/ R3 ^1 R called by 按钮 'setup'# B/ Z, e! S$ E* {+ |
求大神解答啊 |