我编的程序如下turtles-own [energy]* I8 R, J+ p9 ~; Y
to setup
9 x! m6 P( u9 Y! W' p& G clear-all3 X8 Y, `0 f P& R$ U- ^6 T7 `9 p ]
setup-patches
; T4 [0 a2 }$ k* Q create-turtles 100+ G3 Z! _ u( N; i z" b6 `
do-plots% j% W# q1 I; h: L2 L
ask turtles [ setxy random-xcor random-ycor ], t! A4 J) I% H' Q4 c, U
end
% N$ B4 s7 }; U, j( m3 W7 yto go& F: K$ W: ^/ {1 H! l+ b
move-turtles
3 r4 U3 O8 l. i$ r* D1 @ eat-grass
' s" C+ j0 S6 i e# D' v s3 F; u reproduce
$ ^& g. v8 |' ^1 `! O check-death/ V: C T/ Q9 m+ p0 `" E$ v* h+ a
regrow-grass
6 u d. p1 {: ]" V; C4 O. c do-plots& H% P, P6 D2 K/ I: @& a( t
end" n1 q9 T* l( z
to move-turtles+ _! ?! S+ Y6 F: p) J% }+ h
ask turtles [
/ B% [7 o1 [# o4 G right random 360
0 V5 z; \1 g$ |" e, e, P" W: y7 k forward 13 d) t, A; o o; M/ D f i
set energy energy - 1" `/ B' d5 A. B; b% W0 ]
]
8 ]" ]- m8 Q2 ~9 V+ `end" Y: R4 O9 r/ j# b2 P
to setup-patches
' U9 A+ {/ a3 R ask patches [ set pcolor green ]
+ X9 R' s0 A# vend
5 m/ d1 f8 M% E4 @# Vto setup-turtles4 o6 n4 q2 D. N* Z& Z/ Q6 c
create-turtles 100
/ P5 Q/ L- G6 S; p) d* b8 m6 H8 q$ u4 K ask turtles [ setxy random-xcor random-ycor ]1 x$ ]2 ~' L7 P5 f
end$ e5 Z5 p. P! s% o9 F* f
to eat-grass8 O7 I8 V0 B4 {9 Q! X8 D: r
ask turtles [+ b+ E* U% i# E
if pcolor = green [8 t5 y# w+ e6 u
set pcolor black
3 K8 U# m; Z/ c/ _) r set energy (energy + 10)3 W% c3 H" i4 M0 c5 W2 ^
]( O) U7 E& y- x6 Y8 O
ifelse show-energy?
- e) z% o/ ^) h& { [ set label energy ]& \- P. C6 R. P) K0 z
[ set label "" ]% d/ ~$ _: i4 G/ r( q
]: |! K$ [% m* I. f
end
9 ? `: \4 p3 i. x# B, fto reproduce
( l& i7 k' p# L/ B; I, h ask turtles [4 @- a! ~6 m0 X
if energy > 50 [9 H$ a- B6 B) e' }! f/ H. y% X9 b
set energy energy - 50
& y1 T) l% o, e6 P6 d hatch 1 [ set energy 50 ]6 \. N3 q; x- X5 N$ k$ L. X! A" Y6 [
]
) J* D8 V8 H8 k, g7 Q6 T ]
7 K! _! f6 R" ]4 W: i- @ iend
& S! q! a+ ?' K. p2 E+ e$ eto check-death
% N9 Q* b3 ^( Q" ?7 {) d8 M" T ask turtles [0 P+ \7 D7 C, l. g8 T: f% _
if energy <= 0 [ die ] F* k! y* e: g4 u( a7 q' i; m* |
]$ `9 X. Z% x# T1 @
end; c+ A( y2 T4 v. U( i4 K" W
to regrow-grass& X9 f% m a8 m' u, V
ask patches [3 O. g6 e/ ~8 i; n9 [; D2 P% M
if random 100 < 3 [ set pcolor green ]
5 \: S0 Q( v! e% Y ]
8 e$ r" p4 \" \: w4 r6 c- Lend
% Z$ U3 W* a7 T' W% xto do-plots
1 j" B: K8 D2 _; ^& j1 A+ N set-current-plot "Totals"1 A9 Y3 e0 H! h# ]. ~9 d7 H
set-current-plot-pen "turtles"
g# F) E* ^" e! ~0 |! G/ a3 b: L plot count turtles9 Z6 o6 h$ e7 E# h, }8 d5 }
set-current-plot-pen "grass"
$ m, _5 v& M+ D" w5 b plot count patches with [pcolor = green]
2 ~8 x8 s& y. t4 H1 A! `end
" u1 ^; u# R8 l& m1 K% s可是运行时提示no such plot: "Totals"& y- m: a4 r9 E/ z- D9 I/ k
error while observer running SET-CURRENT-PLOT7 f* x9 D1 W, M: u# y
called by procedure DO-PLOTS- z+ A* n( o. R* Z
called by procedure SETUP4 ^1 [9 Q* |, }# Q* B% X' ~5 R% I
called by 按钮 'setup'
- z# K$ `/ J6 Z" n) `) a. s2 X$ z求大神解答啊 |