我编的程序如下turtles-own [energy]
' W7 `3 r. p+ M, D2 tto setup( I0 _' ?& y7 k8 Z7 m" n" Y5 H
clear-all9 g6 h; E$ Z1 _+ F" ^
setup-patches
3 T9 M6 `9 g3 Y. S. j" e create-turtles 100. }/ b8 g5 _: I' I, g' }
do-plots& F& a/ v. k: z! E
ask turtles [ setxy random-xcor random-ycor ]4 {/ t' M! b! @
end
2 v7 C3 [1 V, P( e" f1 uto go
! s2 a, }2 B' k; I- X' \ p move-turtles
' c0 k1 E3 F# S! f) P eat-grass
0 V# [( g2 {* j' r9 T reproduce
* C- D) t3 f* P% e/ E% h ` check-death5 o. G( ^0 R% u+ V
regrow-grass
6 N8 w8 A" o' T, t& C do-plots
& L6 V( `/ r7 w7 b! cend
/ f) k5 z0 j: F uto move-turtles" Z0 i; Q! b/ w! R- Q8 p
ask turtles [# ~4 |: v! I# B7 J& P
right random 360
9 X9 f5 u" u7 K" r) V* J forward 1
# ]8 f$ a% e6 V: j# u/ ~% c set energy energy - 1
5 b* }4 H# ~7 E4 a9 Y6 C ]
@7 v; C1 |- k1 Z, b) e1 W; b1 Gend
# t- F7 A3 E9 v2 m9 n+ Bto setup-patches8 L% A. R/ w$ ^ m7 W
ask patches [ set pcolor green ]- e) _! d! f) O2 s" Q" }8 r1 Y
end
# ~7 m' r7 z$ w, U2 ?6 f R4 S2 N Ito setup-turtles
* _/ r5 p5 x2 u: h2 l' C' X create-turtles 100; ~; K3 x1 k1 c9 D3 ]+ e
ask turtles [ setxy random-xcor random-ycor ]/ Y2 M0 N# @0 z% E, I# `1 u- G
end2 L* B2 p3 q0 A* q, R
to eat-grass
* T3 D: H, b6 z. o) f) a5 j ask turtles [5 t, ]3 p3 j# H! E
if pcolor = green [
+ b- U9 G% H7 y+ R; U set pcolor black
/ V, _) G. S* M# E1 J/ p set energy (energy + 10)
0 s% Q* _" l5 }; V ]- @% _3 T/ G( M' p: l: q
ifelse show-energy?2 P& I; W* q5 `, U5 P( L% R) \. U
[ set label energy ]9 p0 z0 P: l, f
[ set label "" ]5 r) [3 p: R1 ~ v7 [4 Z
]
2 u6 a: H H, X% c' |5 |; G5 Eend2 B1 d% W( \, Q: w) Q. o
to reproduce2 h, i2 C8 \# \0 w6 L3 [9 L, q( g) e
ask turtles [
# j2 I0 [: w- |2 H# N" i6 j) i if energy > 50 [
3 X5 q' l2 d* x9 g" i set energy energy - 50
4 A( d% k! e1 X4 t9 q hatch 1 [ set energy 50 ]
5 x+ |. z. G5 c u( m7 W ]
7 r) y" d: [" Y8 e7 J) J: ]9 f2 w ]* h/ y- o* ~, H' T
end
: B+ X( i6 A9 n: X( d. n9 m& ito check-death- |' C2 K, m: h" l' H8 n0 ?+ A
ask turtles [) P; O' k, z; P, v& j3 R
if energy <= 0 [ die ]
! }* j: G9 p" E( l ] Z4 I# S( T& r
end- d* R0 r, i* h1 d
to regrow-grass7 ~% n# ]' E H, o
ask patches [
" @* m4 I' `6 ~1 u8 f' @5 T I if random 100 < 3 [ set pcolor green ]
( e( r6 W1 L+ q+ y' a ]6 C4 b, b+ H: u5 y* \4 p; d
end- @" n, R7 L6 w* ?6 y
to do-plots/ P$ }' ~3 @& H/ B' }/ e
set-current-plot "Totals"
$ ]$ |! W4 C5 c set-current-plot-pen "turtles" t: i* P* r x2 X: T' f( O5 p
plot count turtles# n4 t$ t& } S- ^% K' g( x* u
set-current-plot-pen "grass"
& S# M s' n& { k+ |) [- ?; } plot count patches with [pcolor = green]3 p$ S( ]4 F# \
end
. R; }( }3 [6 C# P1 f可是运行时提示no such plot: "Totals"
, S6 x% ]/ a! |! h% P6 n4 K& M* cerror while observer running SET-CURRENT-PLOT
5 r- W: S0 I. d$ q1 _; r called by procedure DO-PLOTS5 t3 g$ _( e7 l8 }
called by procedure SETUP: J! N* G! v M: {
called by 按钮 'setup'( G& l( A' S5 j, H; R7 S: \5 \4 T6 \
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
