我编的程序如下turtles-own [energy]0 t7 s) P3 b' X+ Q3 u; e
to setup
7 X. u# A! f3 i! { clear-all$ W1 M, \% R3 |; Y5 E
setup-patches4 M$ q3 v- I+ F, [
create-turtles 100
) J2 w8 u1 |' \' t; j6 ^7 J b4 l2 e* ]3 p do-plots
- b [% }4 b0 y! `$ n ask turtles [ setxy random-xcor random-ycor ]# ~0 J i$ D% Z c* G% t
end
( ~2 d$ q# v' i& `- `to go
0 R: J: _ i5 r* x/ x. L8 O move-turtles
+ h0 C7 M+ E" r$ h, e eat-grass: _( C; w4 b. W7 v+ U; A
reproduce+ @! s8 R" q1 e
check-death
! l0 S, W$ p. l, ?# M& x5 q regrow-grass" M% G. T( r. N2 H: C0 l
do-plots. u, o* o! C1 x: z) U
end4 |6 e8 z% t; c( F$ c
to move-turtles
1 g" c8 N `# J ask turtles [. v$ I- i. w2 ?# M6 ]4 o
right random 360" M$ _8 G1 K- ]/ t# A( z& u" d
forward 1% E' n9 J8 ~$ `4 B# _ j! }$ }
set energy energy - 1- j ?6 d6 _, Z: j+ _% Z% D4 A0 t
]& U! S' a' A' N/ Z9 e A
end4 ^7 x, v6 u* p" z9 G
to setup-patches
( ~- m9 A4 X% @8 F2 }- Y ask patches [ set pcolor green ]
- r4 A. C/ |5 @+ o: ?end4 ^" G, h- [% L- p% ^( x
to setup-turtles
' P" r' }( e5 d* s create-turtles 1007 ^2 s: t: G, b g* s
ask turtles [ setxy random-xcor random-ycor ]
0 E% N) A a( m2 {+ S' O# y1 x: Qend0 H) T4 ~8 z- a4 o7 j
to eat-grass
) n z6 s& l! o ask turtles [
6 j- Z' N0 Y% N( a8 Q! ^! P if pcolor = green [9 f4 _' b/ P9 c% u, E# w
set pcolor black
( M+ }# r. F$ M8 P7 g set energy (energy + 10)
, l2 ~! h6 n' n$ l1 C& e ]/ @% o" S3 k2 p' d
ifelse show-energy?
6 `9 a# l! ]8 X9 W [ set label energy ]8 X. U* C/ o8 Z# _. z2 {
[ set label "" ]+ s' U+ D2 U) I1 z7 N( T/ h1 V
]0 N% \2 V* n# @$ H% v' W S
end
; ]0 X- ?4 i3 [& z1 n) y X. ]- _to reproduce
1 E1 `1 X% c2 V5 x4 l- S ask turtles [
( B2 b! w6 M3 K& K* L if energy > 50 [7 y3 U1 h; R9 m3 {, W; v& u
set energy energy - 50
% g) ^( a* \ Q* ?0 l5 T4 m hatch 1 [ set energy 50 ]
1 Y+ S% o/ |7 h- D: t ], M. J1 S! \3 o5 Y9 y
]9 V9 \3 p5 [+ \6 _
end
2 S' K R4 _2 k: q& d$ sto check-death
; |: @7 i5 m8 \7 y ask turtles [
% s6 g. R( O8 x3 r2 g) V if energy <= 0 [ die ]
' N8 c% [- v; k5 e ]
" X# n2 {' e" }/ P: g1 Xend
/ r0 Y) p% M( r" t3 `" `to regrow-grass
/ j* ?3 ]. u4 D- R9 r ask patches [
5 ^' u; ?' P8 Z) d" F1 X( M if random 100 < 3 [ set pcolor green ]
& j' u: W; H) w# C ]5 H7 i9 E5 W5 B$ B* a: ]
end8 s/ \7 d& ~# B
to do-plots! u# r4 n8 \. [1 S% [: ^; p; D* S2 a
set-current-plot "Totals"
* d6 I O) U2 z% M q set-current-plot-pen "turtles"
; e, Q, n3 |' C* v( P' O plot count turtles3 N' U8 J8 M+ D% M$ Y
set-current-plot-pen "grass"2 w2 K# l2 z) h7 l) q) ? }. Q
plot count patches with [pcolor = green]8 s: y3 s) q7 P
end' _8 y3 ]. Q/ i% J, ]4 _
可是运行时提示no such plot: "Totals"- J. B: c+ v. ?( O3 W) ?0 o9 S
error while observer running SET-CURRENT-PLOT# Z! R6 M$ C& | `
called by procedure DO-PLOTS# j D* }0 ?2 H `- y+ n
called by procedure SETUP
- ]# k Y1 f, t+ V# m called by 按钮 'setup', I+ o2 Z0 n: d1 T$ Z) t
求大神解答啊 |
[复制链接]
楼主
发表于 2013-5-29 00:25:38
