我编的程序如下turtles-own [energy]5 K8 f, G2 _# e% k x {
to setup
. U( U2 j9 e0 ~0 E# Q! l: @ clear-all6 ]' Y, L+ p) r6 c; A8 C& I% a
setup-patches3 _( t: e/ m! L) n/ X
create-turtles 100
7 ^& n/ [+ q, S& d: G( T- l# m do-plots3 l7 a/ |* A/ R3 j$ r
ask turtles [ setxy random-xcor random-ycor ]
, B6 H' O* Q8 D" E1 L: Wend
6 [# X; b6 }& w7 Vto go
& m# G1 g* K3 t1 j move-turtles6 A+ G2 H; G; F& |) ?$ d$ @
eat-grass
# m* g" e) O& n* u% a reproduce
5 z; K. O+ S& b& F4 q$ H! i check-death5 M; h0 b( h+ \8 [, r
regrow-grass8 H/ D8 y9 n, k2 b
do-plots
M- L2 B6 Q# M0 r+ @8 ~end
, q1 u- l, j5 I3 d/ A. R5 yto move-turtles2 ]1 B2 A1 ?; A6 _( `
ask turtles [, [" Q" S* v! [1 ~ m
right random 360
8 H- R0 g# o; w) | forward 1
6 j+ D- A7 k, p+ S set energy energy - 14 ?( u: Y& x; P
]
' ?2 q. S- @' w6 Z$ k, pend
- T( f' R0 G! G: L O2 E6 @$ ito setup-patches- q7 d; v* l5 a& @; [
ask patches [ set pcolor green ]
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to setup-turtles& r4 [1 {3 e, v5 j( k7 ~* \4 Q
create-turtles 100, T( c) a" p2 S5 I" W
ask turtles [ setxy random-xcor random-ycor ]
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to eat-grass# ^2 }" U) d& T' P
ask turtles [5 r3 C) ~; C+ O" j
if pcolor = green [: n: r% m( B3 l) K+ H' k& R& _# @
set pcolor black
1 M( S7 k" Y. w$ H$ x. M set energy (energy + 10)
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, X1 v' X6 k* T5 l" |+ f" s ifelse show-energy?" f. b) ^5 B) ?& q5 q
[ set label energy ]
( \. j) g' g+ S% p; W) |+ B [ set label "" ]+ X6 Y) q. ~: E* L# u0 k
]& }) d6 |6 X0 l* ^* R' l
end
' F. o4 ~0 L( Cto reproduce' Q, F; @8 d# b, s; ?
ask turtles [) c0 s$ q+ ?# n- h
if energy > 50 [2 b5 B' J6 y8 l8 @/ R( H
set energy energy - 500 E+ M7 T6 p( w& ]) [: G# X* U
hatch 1 [ set energy 50 ]. V4 y) K$ c7 D6 V7 e; B
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]; u- V$ a4 E7 H
end
" m6 H3 k3 ?; b6 d# c# wto check-death% b' \4 W! R: e& H, w+ Z( v7 C
ask turtles [
' Z4 D4 ^ V& z: x8 s if energy <= 0 [ die ]6 q: A+ T2 x4 D# R9 }
]6 n8 S. w9 f: z4 U
end
3 S4 J( Q1 |3 ^4 \/ w5 zto regrow-grass# J" E, N9 y# r9 D# B
ask patches [
( h* X8 u2 ~8 b/ Z# n' v# G6 M if random 100 < 3 [ set pcolor green ]9 w8 f2 w6 G' L- s S3 t/ H+ M Y% @
]7 V9 _! d0 {: y2 c f
end4 M2 i. F& ~* n! i' V% d# G* c
to do-plots
" b! ]+ b( {$ j+ l* I: V set-current-plot "Totals"
. y! [; U: U. x! f, _ set-current-plot-pen "turtles"
B- H$ ~- |% _# x8 }3 c plot count turtles
" ~7 f" `! B1 \" n4 Z6 V+ D; `" d* t set-current-plot-pen "grass"
/ r' l G) r/ J" Z8 [4 }4 ` plot count patches with [pcolor = green]
( {- `. {1 }/ t2 i- a) g+ E2 Hend
! f. p; u: {% C' }可是运行时提示no such plot: "Totals"
& ^$ y+ [; w: r8 R9 G Berror while observer running SET-CURRENT-PLOT) U& V$ _+ q1 e2 r1 s
called by procedure DO-PLOTS. H: P0 D! e w p& r' m a
called by procedure SETUP
; P4 K N% v7 Y1 W* _5 i) K called by 按钮 'setup'. k, m! S" G9 E) h7 o
求大神解答啊 |