我编的程序如下turtles-own [energy]4 D: C5 g' Q" A% f/ |' ?! W; B
to setup
: ]+ H, B. R3 A& i clear-all9 T5 P* v5 k6 Q* ~9 w
setup-patches
$ g W+ T; n+ S! g; W: d create-turtles 100' F& S+ M* [5 w) {( n& q2 A
do-plots( Y; Y) ]) i" X8 M, _- `
ask turtles [ setxy random-xcor random-ycor ]- t( u6 k3 m% ^1 F& l. n
end, k& S/ t2 ?) E' t) w" z; J
to go
2 ` W7 ]3 q# Z9 [3 I move-turtles
* [) I) T. t9 {) R. m! N: P6 h* c U eat-grass
9 K: V, A: W, D' [! V5 k% S reproduce
# Y/ V9 l1 q: u4 [7 b5 @/ ~ check-death
, p; P9 }" {3 E2 c$ D6 | regrow-grass
2 B& N, `/ Z$ C5 h/ z( h5 [ do-plots
. v. y6 y/ [8 G5 Rend
+ \: t* t8 A' E+ _) A6 R8 ~to move-turtles, s8 m6 Z8 K5 I4 e8 g, \
ask turtles [
) p2 x/ D/ L7 H5 f- Y: b right random 360
+ v& C W! W, @ forward 1( }" H+ g5 K5 S3 ~/ ]3 d
set energy energy - 1. o7 [8 z1 j( L8 |1 p
]
; d) n) v# x4 w! {/ l& dend9 ~) M2 K/ l* Y4 D
to setup-patches
- j) S7 @' `% H ask patches [ set pcolor green ]/ f) o9 p$ C5 k/ b
end5 C4 ]5 M9 ^; g
to setup-turtles
, d$ ~- {* e; `& G- \ create-turtles 100
# U9 Z0 S2 K5 B" @" v5 A ask turtles [ setxy random-xcor random-ycor ]
' H5 B% f2 ]$ M8 _8 |end
+ v& D* s1 F9 d# c( N* M; rto eat-grass2 c3 W- ~, J( B; U9 J. _! i
ask turtles [9 d' `5 g( Q4 t+ }
if pcolor = green [3 r) f; I' u8 D# Z. | W1 l8 w
set pcolor black& G& C0 C% v4 Y" S
set energy (energy + 10)3 k% Z2 a! O% v: S) O" j
]6 s. S6 _0 Z9 R& Q0 L* k# ~4 y0 p. i+ Q
ifelse show-energy?; N* o U* ?" T C4 \; R2 A1 S
[ set label energy ]
/ t6 J6 S; p8 E; d$ V5 w! P" F [ set label "" ]
( t, D2 v0 ~5 y& B, p ]
{- h& F& h9 I7 z. C( J" mend
0 ~8 t5 U! N9 jto reproduce( v. |% F$ A0 _2 J$ \
ask turtles [
8 _; D8 G4 o0 I7 {6 y if energy > 50 [) ]9 v7 }9 N5 \* m" p h
set energy energy - 50( F5 w/ ^1 m+ I" s" k
hatch 1 [ set energy 50 ]2 W7 e* @/ K6 V. Z% m, H) N8 K# x
]
9 A5 F5 D! Q# p0 q7 Q) q6 B. W ], }9 V/ g% t! M
end' f$ p, r# x; r' S4 O
to check-death
2 h- ^0 b' @0 \# ? ask turtles [/ ~* n4 ~% _. q2 x" h! l
if energy <= 0 [ die ]
+ P( \6 @4 u! h% t ]: _2 h2 x4 D4 C9 j- {4 R; u! s
end9 x: N% ^& g0 G# _7 T1 y- d: x
to regrow-grass: ^5 s1 D3 b9 X+ k
ask patches [
. j. C& J( E* h1 {. D3 u4 l1 I. M if random 100 < 3 [ set pcolor green ]% A9 |' X% w+ o
]+ W. w( d( A8 X7 j, a# y k
end/ u9 W; }+ ?5 e* O
to do-plots3 \8 F2 r, _3 v" }5 e- x
set-current-plot "Totals"
) S( k9 U. ~% Q2 `9 `9 Z* |" o9 C set-current-plot-pen "turtles"1 i! R4 A, F$ \8 a
plot count turtles
b" ~" x, \& O8 R/ N" X; e( B# ?' n set-current-plot-pen "grass"4 ^4 Y! ~9 E2 S2 @2 O
plot count patches with [pcolor = green]
2 h9 _% W8 w/ y1 N, B& Uend9 Z+ \. @" [. o9 K. }0 _
可是运行时提示no such plot: "Totals"
& E9 ^ Q1 D8 X" f# `error while observer running SET-CURRENT-PLOT
4 p5 i8 U$ t6 U2 E called by procedure DO-PLOTS/ c4 m. K( i5 K4 ^6 w* a1 k) L; O
called by procedure SETUP
) _2 ^& H; }; ?/ @ called by 按钮 'setup'$ I; X0 k+ p a; r; X w4 `
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
