我编的程序如下turtles-own [energy]
4 y7 `' o7 c1 _3 g+ {! o# K' mto setup/ e$ ~6 g( k1 n! W
clear-all
1 W X/ O% Y; v) h, k, Y8 `- G setup-patches
: J# F: K2 q C9 Z6 h# q create-turtles 100
8 r3 o- _; s4 ~& a1 W do-plots
& T9 c! ]; m; v, |; k8 d8 G1 Y3 d ask turtles [ setxy random-xcor random-ycor ]1 C' w7 a$ N" T
end9 {/ \; k* F& v0 ^- E& e: ]
to go5 n9 u1 c M9 C& b/ Y
move-turtles. T; h: U; q6 P' \( R
eat-grass
6 P, n; P: S" j; ^4 G1 i. @ reproduce
l3 A" S/ N- f6 m/ T/ \ check-death
. r4 }& T. {# H( Q9 t! h& ? regrow-grass
& q. b! ?) `. [* \; @: x7 }- a do-plots3 V6 Q9 ~% c/ r; r7 d7 Z
end; K6 i* M7 @& `# b9 Y: J7 |) a: ]0 L
to move-turtles) q( C9 m$ `" l- Y: x5 [! n7 X# x
ask turtles [; r* j& V7 K9 A1 j# }( W) B+ {
right random 360
2 f8 p9 U$ ]; O; Q" T, W) j( z forward 1' n0 A4 S! w, r E- h, i
set energy energy - 1
$ r: X( g. y0 v3 x ]
0 q D" E4 b) e( Fend# x' w4 O( w" `! ]8 R8 u
to setup-patches9 H; }- A s. d2 N# i
ask patches [ set pcolor green ]* z! V5 D# ]. [" O% B
end
( x Q( h7 U# p7 i5 E z" P9 qto setup-turtles+ \5 \: R/ ~5 l6 ]' M: T3 g3 Y
create-turtles 100
% e; x0 P7 F1 H. d0 [1 l ask turtles [ setxy random-xcor random-ycor ]
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to eat-grass+ D2 r" Q% s" v$ _
ask turtles [
9 A2 ~1 X; J+ I. \6 o; t if pcolor = green [0 k3 I" i7 F8 e$ b6 p; O4 _3 O
set pcolor black% [: @3 k0 s/ v" ?1 O: k
set energy (energy + 10)$ w, g# R( ^5 ^# T) X
]; y& g i+ u5 ~+ Q% u* d/ s, g2 z
ifelse show-energy?2 a- n! ~$ }7 ]9 n
[ set label energy ]
. h8 d* c) d* m" e [ set label "" ], t2 Z# R7 t4 e! L: |
]
! m+ W2 D$ E& z8 L6 T2 ?' nend; _% g3 ~+ p: P
to reproduce b: }4 a- _/ h9 j2 {, O
ask turtles [
; N. W$ O# e. m) o2 L: p if energy > 50 [
3 H9 `3 v7 t1 p5 \: v set energy energy - 50
" Y: y, [4 G: J' d1 h# r/ C. | hatch 1 [ set energy 50 ]
6 h6 b' M; m4 x2 p ]5 A$ ]1 ?- X4 J; Y3 ^+ f
]$ x9 r! w3 F# r$ N
end
$ g+ t! l) ]* s6 O, mto check-death0 S2 c! ~2 V B5 [* Y2 @: H
ask turtles [4 H+ \& |) T2 d# N/ N; Z
if energy <= 0 [ die ]/ P* d v. P/ ^" L! t+ z
]
/ D' C; F3 ]8 C* Y; x' o( Iend7 q+ R; e) @9 z3 V7 v
to regrow-grass
! C8 d- R: }4 Z) T8 q( \ ask patches [ l9 p. f) s5 `2 A2 v" Q
if random 100 < 3 [ set pcolor green ]& a1 [& x; \5 `' R
]
9 v, L: ]. {2 O* W: y" D/ }: iend# K, t) W3 _1 F" A
to do-plots% S3 v5 r* ^: \7 o
set-current-plot "Totals"
4 a% }1 t5 D ?2 L3 `; A; v+ S. h( c set-current-plot-pen "turtles"
$ f; \# }, ^' R- r( k5 x# l; o plot count turtles0 r/ z; t2 u7 j$ a0 T4 r
set-current-plot-pen "grass"$ Q; d1 r! m+ b) c2 P% @
plot count patches with [pcolor = green]
6 L4 B1 @( m" H# ^end
) g, P0 I- B" P4 U2 e( f可是运行时提示no such plot: "Totals"
% p% ?+ A* n) j2 o) cerror while observer running SET-CURRENT-PLOT s* v( M* i1 s
called by procedure DO-PLOTS
, q# i* G/ O+ J6 l4 b* x( [) z# P called by procedure SETUP
' m" M$ A: d5 A' V6 s5 O0 p5 S- o- M called by 按钮 'setup'
3 u3 ~( z+ S( |; j7 Q$ t/ E# P- B求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
