我编的程序如下turtles-own [energy]
; o( k$ p e6 |& m1 z8 N. }to setup
) ~, j& Q) E0 l; O( } clear-all! m& H7 ~0 O* T J9 |2 K' u' A
setup-patches
: |; a: M( B# l) N create-turtles 100
. x( ?0 j. q- M0 v# D8 s do-plots
7 o/ @5 h% a7 q2 p6 D4 C ask turtles [ setxy random-xcor random-ycor ]
7 [, O3 @/ p5 e5 q3 Cend
# e0 Q2 U) K3 |& _" rto go8 _$ m4 ~8 e# S" P. K, n
move-turtles; U) s) N) o1 m' p$ Y; B
eat-grass/ x% \; z/ E4 g9 m/ C9 j) a* l, p
reproduce" i: D9 w8 K3 V# Z( i/ P
check-death# }8 O" m' V0 r |
regrow-grass
+ T2 f3 e4 ^' b y1 L: j1 m do-plots& w( c% K+ Z7 n. k' H
end6 [: P2 f1 u% K5 Y2 _& ?! n- u8 t
to move-turtles' x3 B! n$ Z& r8 r4 S
ask turtles [. K( p- Q% k( I: w5 J4 ^
right random 360
( e4 }; H' k1 k8 v0 m( D forward 1
) S7 e1 E' i7 I6 G' R set energy energy - 1
0 H6 L! c2 R; p7 ~" g& ? ]
3 S3 u/ I' g- q' a$ Uend& R* `- r; Y# @/ r
to setup-patches# l1 @: b8 `/ c6 x- b
ask patches [ set pcolor green ]8 d' ^ y) l6 K+ t
end/ W' N6 j* h% Z3 z _- M
to setup-turtles7 X# x- ?, _7 U
create-turtles 100% R) F6 x" K/ d* T8 A+ x7 V
ask turtles [ setxy random-xcor random-ycor ]
/ J! i) N2 M8 qend
f( g! q$ z9 r+ ] k rto eat-grass
- }2 N2 x3 Q) k9 W. @ _ ask turtles [% N, M0 B( v- c! n: m% l3 L* T. i! i
if pcolor = green [& y$ F( {7 m3 _1 _' ^7 h
set pcolor black7 ^& p/ P) q% C$ d. w
set energy (energy + 10)
* Q" r1 f, O3 C9 M1 P ]: u S% Y& F. P- v
ifelse show-energy?
( ]7 s# n; E; P) ?- r [ set label energy ]: I/ N; A* \: U0 h" o$ Y4 X' ^# g
[ set label "" ]/ A; ~/ T G0 S2 e
]7 [3 \! \6 l# }1 L+ U
end
7 M" o$ `/ i/ [9 V" q) o' @3 H5 ^to reproduce& r9 Z+ t" b+ w8 \9 O4 P/ [
ask turtles [
. V5 i4 e; | G* E* A if energy > 50 [# T- a6 X# s; S( R
set energy energy - 507 e$ {* T! n0 [9 G# Z" |
hatch 1 [ set energy 50 ]
8 o2 L6 _3 {9 h2 i" `7 j ]; o) f `: j+ v7 ^; J
] a. G4 T3 u" H( }
end* {7 g" `0 g$ ?" y' E% x \
to check-death2 k$ }( F3 u0 N+ g
ask turtles [
, H5 X" g; F/ h5 f. A if energy <= 0 [ die ]8 i" {& L! p4 G+ ^7 k
]8 s& j* z9 |) s* g0 M& \2 D
end
" q+ v+ N. ?+ B' D, \! N. Ito regrow-grass* {( a8 S }6 L3 h
ask patches [/ {9 ~; f8 C: ]! h- s
if random 100 < 3 [ set pcolor green ]
1 |5 x6 B% m, c0 _% ?: i, r+ L ]
* l# Z: c7 V0 v+ ^end) L0 k/ U& I1 V- ^1 Z; c1 y: I* y5 A
to do-plots
6 O0 U3 b8 Z2 c5 M9 R6 L set-current-plot "Totals"$ u7 o; T9 r# j% i" p
set-current-plot-pen "turtles"3 ~- o& _/ q4 A. k6 e
plot count turtles4 |7 |2 w: u% i+ C; S* K1 A
set-current-plot-pen "grass"" } T% V+ h# s; F
plot count patches with [pcolor = green]) G8 {8 n; q, N( g' q
end" ~( L. e* f* R# e
可是运行时提示no such plot: "Totals"4 I8 k1 I: T7 P7 i
error while observer running SET-CURRENT-PLOT" n, I4 h; J/ {/ U+ @" B
called by procedure DO-PLOTS
, Q' h# K3 d9 \9 o3 k2 v/ g4 N# H1 L called by procedure SETUP
4 l5 s$ ]& p; x4 `# m K& @ called by 按钮 'setup'! e y0 q1 R7 ^ K/ y5 @# I5 J
求大神解答啊 |