我编的程序如下turtles-own [energy]
" P' i" B# j9 E5 ]7 J4 i6 }* pto setup
6 r$ M) P8 H$ q( {! z clear-all8 I$ U# D, X! D) q0 `( d; t
setup-patches/ _- v$ c% f7 w5 L ]; @
create-turtles 100
- n5 C5 u/ T$ d4 b7 ]) F$ U do-plots
. N# {9 o# q% @$ _" P/ G3 E ask turtles [ setxy random-xcor random-ycor ]+ L$ h. l. l# Q" m# o+ I I& w' j
end
# k% U1 c, @$ jto go
0 F) H+ @# i; A4 Q move-turtles
* _: q6 {* P$ {* H# H. a" [1 x$ l eat-grass n3 H2 n# C/ I8 q- |) j
reproduce
+ V$ ^. z4 N9 `7 O check-death
$ T* h( V; M) H, R( K. t regrow-grass
4 K) @7 d, ?2 A, l# ^3 L do-plots
* G8 @9 a4 w4 w0 t6 iend
0 Q Z9 G$ ?5 x2 c7 P) k$ k+ A( zto move-turtles
8 H1 z0 F9 Z9 ~# r; F" p3 h7 t ask turtles [, |( W; B/ k6 H/ e* ^4 Q* N
right random 3605 V# j+ h/ H, w$ G( \
forward 1
, c5 z, L0 x, N set energy energy - 1# e) v% \: _ K* O$ m
]& `. _" \% c! `- x; I) |8 C& k
end
, R! K( c0 J8 d' E, D0 Kto setup-patches
( ?5 E: Q, K' M: z2 I" N, M7 P ask patches [ set pcolor green ]- k ^& y. [% B" a
end# \ V5 E- T" G( P! t
to setup-turtles$ H5 r! M2 c% a8 ` t8 g8 v1 r
create-turtles 100: W6 T; m" t( k
ask turtles [ setxy random-xcor random-ycor ]( N. a0 P2 d6 |( I
end6 f/ b: V' R# \4 X
to eat-grass. J, n) X9 c4 d3 c6 p& ^
ask turtles [% K0 U! g. ~: v- N3 T' P6 y: W' r
if pcolor = green [
0 Z. B4 N+ ]8 `. v set pcolor black0 Z/ L$ M. l$ O7 h4 `, W
set energy (energy + 10)% q. |+ @$ Y. Q2 g1 g k
], f7 ^6 F& g* N( b. N
ifelse show-energy?
7 z- o1 s% f) b: R [ set label energy ]
* w; ^7 U) W2 M3 S [ set label "" ]
/ N v( o }0 i/ e- n* n) z ]. d/ B( c2 R5 ]; e E
end
! X4 s& d% Z4 zto reproduce
! h* o# p; ? x4 X ask turtles [
. C9 M: J! k+ ^2 p0 ^ if energy > 50 [5 i5 N7 F4 w# ~1 b3 L7 L3 g Y/ `
set energy energy - 50
* @2 f; K, ?5 S! v hatch 1 [ set energy 50 ]/ L( }/ S" @& L6 h0 a( c
]
. n. i/ K6 N/ P! _! r7 B- b ]! @! k! F2 v3 o+ N, C' @& v S
end8 n! S! r. k$ ^1 }+ C
to check-death1 s, a* B. @5 S0 q' P2 T9 m
ask turtles [# d# g7 T5 f) V
if energy <= 0 [ die ]: l! K/ H- O$ `
]& X: B+ c- v/ B$ C, B( W
end) G0 Q7 q& A. ?) U1 _* t
to regrow-grass
1 ?: v" ?9 ~$ a: U ask patches [! ?: J0 {; i. G0 s1 |* J$ \
if random 100 < 3 [ set pcolor green ]
2 [0 m& g; z( Q9 N7 }4 @) I- M ]
6 U$ \: e9 I* V& l- f8 W9 Jend
8 l; V8 i0 w9 v1 ?8 u+ oto do-plots0 T# N. F( H8 \9 m
set-current-plot "Totals"0 e# i( S8 }7 i6 @
set-current-plot-pen "turtles"
6 Z$ l: U9 z5 t plot count turtles7 p" k6 n* n- d! L! y% S5 \' y5 T4 i
set-current-plot-pen "grass"2 p8 B) N) V* r! P# q- W/ ~. h
plot count patches with [pcolor = green]
( G/ W' ]1 x C/ T$ n! Pend2 _; k0 S* P6 g) u
可是运行时提示no such plot: "Totals"
# s6 F/ F. B- e# _& derror while observer running SET-CURRENT-PLOT0 l& Z# {/ M6 p9 ~$ }
called by procedure DO-PLOTS3 \5 a: C. p) a2 u
called by procedure SETUP
. H; T) m; X8 t5 P+ w# D& t called by 按钮 'setup'
- i5 G2 H D9 k/ R$ d3 j+ L! Q求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
