我编的程序如下turtles-own [energy]
9 E4 e# @9 i4 U; J1 ~ Sto setup
2 O& ~0 l9 C% d) j clear-all) \2 S# {* d1 O+ a
setup-patches
- c* p5 x* x& O) j- m3 W% Z, O2 O create-turtles 100
& q$ o8 `2 F5 s8 w2 F, Y8 ]0 f) a do-plots
* \; e i; }9 R ask turtles [ setxy random-xcor random-ycor ]
: K3 U% Q3 \3 b# q; Z/ Send
) L! k5 e: @0 wto go5 \& |% z+ W$ D- X* l! D1 Z( j
move-turtles3 {2 R T" L5 z! G" H% g, q
eat-grass( B Y- ]" f( e
reproduce' {- R" @ n+ L* z5 k
check-death8 f- X1 f7 _# {* U
regrow-grass
k4 Q3 r( d7 ?5 d0 y% T$ H L+ f" X do-plots3 s* |$ \2 ^* x
end% z! v2 x2 {+ O! m$ }3 v
to move-turtles3 T0 A' R+ v9 I2 }7 Q- n
ask turtles [% x, V( @9 N7 z/ K
right random 360
Y- a( h+ F# o2 I6 G5 Z/ b4 ~) ~ forward 1
# Q, g9 z% j$ S" K b; e; p set energy energy - 1- K L+ x1 \# m! |2 M$ }) s- ]6 G
]
# }% D; w5 l+ R$ L5 i( {4 Gend# [6 D, K8 l7 Y) Q
to setup-patches& T( t, e( l3 B) ?: ]
ask patches [ set pcolor green ]: x b& ~: A# h: ~, P' Z; L
end. H. c) `, n- p- V
to setup-turtles
+ O& p6 F+ O8 c/ z create-turtles 100
8 |2 C% Z* o& I6 o' B ask turtles [ setxy random-xcor random-ycor ]
9 F) k' ]6 T$ w" x2 gend' x2 w/ A" @; W \- N+ v$ z# J9 M6 @! P
to eat-grass
; i8 l/ R$ v" d# {( d( L, G ask turtles [: ]- }8 h X# E# `8 N, Z
if pcolor = green [
L5 ?. @* F% ]* M5 Q* W, m7 e1 @ set pcolor black
z& F# V, d+ D( i. I" X; k# I set energy (energy + 10)4 W z7 G# j& L; w' ?" Z) p6 |
]
5 S0 ~9 v& q8 u5 r- H ifelse show-energy?
8 H0 h6 M6 b' A1 ]7 w% _9 T0 j- @ [ set label energy ]
# W: K6 U2 J4 c* s- y+ E: l2 ^ [ set label "" ]' r7 y) n* [; \- p1 D4 P$ Y" _
]: k4 V+ c* {1 b
end
1 A0 Z) K5 w7 e$ [( u( M3 gto reproduce
3 v4 N2 Z' ~* p5 B3 X9 P* L ask turtles [6 @: m6 u* V% d$ X' a' z
if energy > 50 [, _" p1 s; x7 v5 b
set energy energy - 50
- u2 D/ K9 V7 j) d5 c& P hatch 1 [ set energy 50 ]
4 Z+ _# U% U2 q& ]' b4 J# u ]; K; v' d0 b( Y; z' O
]
3 K0 I. Y2 e0 Q8 h& yend
$ p* J! \6 O3 Q4 m& O; [to check-death
, i* _% L+ B; E8 g# O2 F `% e ask turtles [# ~$ E' \7 `9 ~& E0 k% d4 x& Q [
if energy <= 0 [ die ]
7 P( i2 g7 T% q1 x, [- A" i. r ]! y: n1 Z# Z3 g
end
6 ?& |# f" r6 h9 Lto regrow-grass
" d& ?; K, F# P/ b" V ask patches [# H( y0 E: j s
if random 100 < 3 [ set pcolor green ]7 n. |9 Z4 [* j; l6 w2 ]
]
8 ^) h/ p& H- Y, l. ~end
& O. S% o; I) |/ L/ R& Ito do-plots( m) w# F* @1 p% w5 A
set-current-plot "Totals"2 _& b/ Q7 ^5 i9 L4 X
set-current-plot-pen "turtles", ~* a; J# ~: W; E/ }. y9 u
plot count turtles; j3 {2 x* x8 ]% q2 e6 n$ ~
set-current-plot-pen "grass"
& a# \! U% M: M4 n& q8 I) f+ `3 { plot count patches with [pcolor = green]
2 }( o5 o! O6 [- }; o" Vend
c# U; B7 w$ N; `; |5 P7 ]可是运行时提示no such plot: "Totals"
' l1 W! J8 |: t' Z. P- |7 u4 a" }error while observer running SET-CURRENT-PLOT# ]$ n! M. l, z# b7 `) `
called by procedure DO-PLOTS3 @( n+ V& I- i5 C. K6 M' S# x
called by procedure SETUP
+ j) n& y0 ]! e; m. P: L called by 按钮 'setup'
* o* w6 a, u5 w& P% `求大神解答啊 |