我编的程序如下turtles-own [energy]; D* K' G* j( A" b! @2 V
to setup/ l3 B) s& w1 P8 k, u# u
clear-all8 |) H& n( |' n; r
setup-patches0 I$ i* d8 \4 J6 M7 J; j
create-turtles 100( \; r" J6 U9 O c7 E( P6 c. K
do-plots
3 _5 V3 z# V: ]# U5 P# a ask turtles [ setxy random-xcor random-ycor ]) D+ g# U/ d: i7 j) x% _! e9 ]
end
- E3 I j- O+ r) ` sto go# h" p# B" c q+ ~3 U! K7 o0 f
move-turtles, @8 o% G7 y) O4 F
eat-grass
' U1 O2 _6 q' p/ S5 S" { reproduce
9 a! g2 f5 d$ X/ X9 r8 e check-death# A5 o% N! E! C: e O/ g* ?
regrow-grass" i4 j, r' J4 ~/ I: M
do-plots
9 ] M6 M m+ l2 ~# {1 n5 C) Qend
; L5 r/ |9 H1 b/ V8 n3 O. Vto move-turtles4 }% }1 \: n7 A
ask turtles [
, G5 ~- e, y$ p+ c% y4 L# k right random 3600 j' e& G: [/ P* {( M/ H! | @
forward 1' g J E5 V, h6 M6 w/ W
set energy energy - 1
" Y- s) k7 d, q' D+ i7 w$ E0 F ]; b$ H6 `# F+ T
end
) }$ I* z# k$ ]' F/ }& xto setup-patches
) }8 o. c: P$ p3 C4 C ask patches [ set pcolor green ]
; K! R! |8 ^: s$ v# x+ @% yend
4 ~) L& @9 w; ]. N. g, Tto setup-turtles
( j: R& k$ Z7 B9 } create-turtles 100* s$ f5 ^* ^9 M5 S8 r
ask turtles [ setxy random-xcor random-ycor ]; M1 A2 J% @6 a" Z* y
end/ S4 g& O8 y! s5 |, M* Y1 L) W
to eat-grass1 S" ]% g8 O! y
ask turtles [
0 g( }1 n' t, T8 b0 t! K if pcolor = green [% @$ v% T. o7 V
set pcolor black( O" _# s0 G1 \7 E2 h
set energy (energy + 10)
; m; P# M# [( f5 e- G ], S1 A- n- ]$ B
ifelse show-energy?2 i$ J5 }: g, d+ [
[ set label energy ]
% e8 q: n( k0 R, m7 @% Q4 J( B [ set label "" ]
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end* K8 _4 U% U; c! d9 y3 `5 Q9 K% K- g
to reproduce
, S$ ~" J6 u* w ask turtles [
* Q1 j+ h* l; q* @ u if energy > 50 [$ q, ?+ ?) h( L; U& q/ ~
set energy energy - 50
, q0 U' E) O( x# g. d hatch 1 [ set energy 50 ]
( X9 a b5 F4 _2 J6 P ]
: R6 w7 b1 b1 A+ y | ]
6 g* V; e. Z! O. O; F! a( f7 t1 d Jend
" E9 k0 R& C+ o7 `. D+ s: ato check-death; ]* p% T1 g. ?1 E/ y/ t% z9 U6 Z
ask turtles [ X: O1 s" I1 g- f1 b
if energy <= 0 [ die ]; T4 M9 i4 _* O7 E$ P% ^, g
]
: K( F+ r1 C! M( u8 G9 M- oend
. [ h7 o, k9 Vto regrow-grass5 R7 Y% o9 v4 h* J$ b* R. m' B
ask patches [: e) `, P6 X+ z3 O+ t% a/ L s i
if random 100 < 3 [ set pcolor green ]$ b& u9 h1 D% y% v& J) t0 _6 M$ l0 Y; L
]
7 t% {/ I! L" nend
! w! L, c. K$ I" qto do-plots
% y$ v- W( w1 \/ @0 ` set-current-plot "Totals"
5 n1 b: A3 I2 [* R' q; n g set-current-plot-pen "turtles"
- v) S/ W0 A9 V# ~9 V plot count turtles
( c( a3 ^* h0 N set-current-plot-pen "grass"2 G* L/ g$ Y3 F/ q8 Z3 L* X5 T
plot count patches with [pcolor = green]* L6 n |% e" u. I
end/ ~/ l: T* t+ D! ?1 n% O$ B k
可是运行时提示no such plot: "Totals"
# k8 Y/ s4 h' }0 qerror while observer running SET-CURRENT-PLOT& L4 Q: ^9 l/ ?$ f4 B: H4 q9 E# R3 ]9 {
called by procedure DO-PLOTS( v$ V9 l. S6 z
called by procedure SETUP8 j4 J) L7 O1 ~" g
called by 按钮 'setup'
, M. w2 N% d9 e6 O% C3 i- N$ T求大神解答啊 |