我编的程序如下turtles-own [energy]1 W, f$ @% I+ T; H' Q% p
to setup
. @) f% p! M3 A d/ A7 m& F clear-all
: G. v7 b. c d' a- ~1 k* ^ setup-patches' z: {3 v4 N) W( N
create-turtles 100
; z$ k( u: X$ K4 D9 _ do-plots0 O& u" l- `/ i1 j, G& P9 \
ask turtles [ setxy random-xcor random-ycor ]
4 p, F9 c1 y! mend
! M \6 f" m% t, G: ]0 d; N9 h* m2 dto go/ s: s& s/ o8 Q: u% V/ R' O: g
move-turtles
& J% P* V& g9 A6 Q eat-grass2 n) M' M: e/ f) q. C& }! @
reproduce
0 f+ d4 P' ^2 k. h9 R: _7 t check-death
: T! S0 s& Z2 E4 t( l" y c regrow-grass
, e$ l3 ]1 l' t, x. v( _6 [( H do-plots
* m1 h! K$ y' Qend5 [2 T2 {8 V, ~" `6 |
to move-turtles
1 z, z2 }2 ]- p% j+ o ask turtles [# L$ L# F9 p" ?8 D P
right random 360
N1 L5 j1 I5 Y2 U! h# q forward 1
. C k8 ^3 u; g8 t* t set energy energy - 14 ?! J! Q/ ^8 g
]+ N2 N# \" W$ ?0 n
end( O, S. F7 ]% s% m
to setup-patches
8 ~, P- }8 {. m, y ask patches [ set pcolor green ]& u! e; U' n$ A5 C4 h
end+ h# v" M! W }$ U8 a; e
to setup-turtles. {* S% q6 g" L9 i. v3 _" m2 ^& \
create-turtles 100
! h8 B0 z7 {( H7 y' v* o( B1 ` ask turtles [ setxy random-xcor random-ycor ]6 a7 U4 G3 K/ M7 y; B% W
end
- B- z9 c* k! P1 b% M. z; @to eat-grass1 o. N! p: y" _. P
ask turtles [
* Z8 ?7 G# Z/ v0 W if pcolor = green [" p% L+ p9 `7 a& B* z/ d8 |8 p
set pcolor black7 u' j3 j6 M% z d/ n# H
set energy (energy + 10)% V4 W6 D0 g% z1 B( [
]
, ]! u! C i' X ifelse show-energy?+ I& N4 ]! n8 H# t: R4 V' T
[ set label energy ]
; F1 D8 R7 \! s9 N9 R3 v7 Y [ set label "" ]
% I7 `3 D3 a. ~& r. J ]) Z( V: P ^+ J! _2 c
end% n9 C0 M2 c% `% J* C# a- D
to reproduce N- `# w$ c+ I( k; W2 S
ask turtles [
/ i6 G" h3 j5 t8 ?2 c- _% e0 ] if energy > 50 [
; i6 O% o8 H2 W) p set energy energy - 50
$ C, ~# I: P7 f) K/ A hatch 1 [ set energy 50 ]/ V: `' o, l0 X
]0 d& O9 @' q4 S/ S. l- U
]9 i$ o# a# Z4 f" _
end) f0 s; D* h; l3 A" e0 G/ M
to check-death
9 y0 w% O R, Z. g s+ k) p; r ask turtles [
, Y8 F+ K6 J8 h; w4 y1 a# H- s F if energy <= 0 [ die ]
8 z6 r8 \, D, n% Y' P! @+ S ]! g. I6 \8 t- E9 n. T, Q0 I3 d/ B
end4 B6 x; E5 c" ^$ Z7 Y
to regrow-grass7 U7 F% [7 d% W
ask patches [
% d, k. c- p+ H) d# ^+ F$ d# ]8 q if random 100 < 3 [ set pcolor green ]
6 k8 q5 w+ O. l ]$ _* h2 ~0 o) T# k. U2 V# c
end
9 P+ d# Q6 n* @to do-plots
9 ?. ]1 b& j* o9 H$ | set-current-plot "Totals"
' n- v0 A/ E# z m set-current-plot-pen "turtles"
) l: P4 Y; E: @+ K; Z3 M: x plot count turtles
3 N3 m! }& s; L3 F( E4 K* J+ j) u! ` set-current-plot-pen "grass"
# u) X0 ]: u9 ]4 {" n% ] plot count patches with [pcolor = green]
/ m! H, s2 [2 F' Gend9 q; ^9 F E! F
可是运行时提示no such plot: "Totals"
% G3 A3 B0 A: I1 y0 Q/ Zerror while observer running SET-CURRENT-PLOT: g1 a3 B$ j( s* X! w( H5 i
called by procedure DO-PLOTS
0 l) Z% ^9 g1 D( N/ S called by procedure SETUP
9 I, ~# B+ ^ ^; p& U- q0 L4 I called by 按钮 'setup'
3 S7 O+ ]% S8 Q1 U) U求大神解答啊 |