我编的程序如下turtles-own [energy]
# j. Y$ }, Y/ uto setup( r- s/ f3 P5 E0 m0 b$ X, E
clear-all8 X5 c: N8 c9 f. |4 p
setup-patches
$ c' I6 f2 U) e8 \& ^; `0 L# m create-turtles 100
$ J. K; K G) m/ ?, P do-plots
) [8 v/ b! ^: C5 e ask turtles [ setxy random-xcor random-ycor ]
+ d3 e; Y, q! B! e' b2 {1 H& b% J' I' p( Dend4 [9 D2 J1 \( ~) l. F9 y
to go
+ e* h- K& g5 V. R# |/ I/ G move-turtles
, E1 `( O! k$ l N eat-grass
& O: ^3 w9 M/ n( F reproduce* Q1 W4 P& ?3 B. O5 \0 T
check-death
8 X% j4 t8 b3 }, \ l regrow-grass4 P3 G! p; M W+ F
do-plots+ g) |2 J$ s% w# C
end Z0 b0 Y1 L" V% g" I0 S4 ^- Y% g
to move-turtles5 O1 x- H8 |! @) R
ask turtles [5 H( S: {0 h& G6 K$ y
right random 360
& ] ^4 m: n" F6 t, G& K forward 1
: X+ E0 ~5 [ H0 U) S* [) k$ d set energy energy - 1( J6 ]- J8 @; w& F7 ^
]
2 e: [. j& S) kend
2 ^7 e+ Y* a% V$ A8 V' Wto setup-patches" ?( C/ s' Z. z1 h+ \' K" |
ask patches [ set pcolor green ]( Y+ v( `# k t" h
end% s) s2 v! A/ u# T0 t
to setup-turtles( ?7 o8 g4 F' e- e3 L
create-turtles 100
, R! J5 t2 I6 P+ Y- v/ w' S! K ask turtles [ setxy random-xcor random-ycor ]
4 @* S' H6 R; R: W5 g xend
. ]" I! P6 P9 l* f- w" A$ M5 X( }to eat-grass# U9 ~1 A# |4 m+ [3 H" a3 y
ask turtles [
; k2 K" q4 I: F- J1 Y; o if pcolor = green [0 K' |. {& c$ j3 [7 z4 O
set pcolor black
9 f; }; r6 Z% A* q/ K set energy (energy + 10)
: d0 y4 ?1 m' E ]: d/ Z" k! s. }: T3 m+ F
ifelse show-energy?6 m! s w: ~, v2 j. Y+ O
[ set label energy ]
5 }' |& ?# @/ h0 c [ set label "" ]
3 o1 g* u0 Y3 c- X6 G1 V3 C$ n ]# ]: d4 N$ P) z7 F$ M* s0 s& D: S
end- B, q: n( z: I
to reproduce8 h6 \5 C, I+ R
ask turtles [/ d! M' g7 s9 c4 ^- I! o
if energy > 50 [9 C0 Q! F4 g i$ ^/ W. K+ C
set energy energy - 50" a5 C- n" U6 E/ b
hatch 1 [ set energy 50 ]
9 B! Z' V2 d5 [* v) G: P \ ]
, ]. M# U5 E% J* O: U3 w7 v ]% t9 ^7 c3 v4 i3 @8 d! }- ^
end
& O, P2 E4 _; e/ [$ t' Q& fto check-death @1 q5 F9 m4 q, h2 P$ N( a
ask turtles [
2 Y: r; F6 r8 Y+ I- m: T" j( K if energy <= 0 [ die ] |8 E J2 f! m( ?
]5 Q2 b& R/ g. }/ ~2 c/ x
end1 @8 B# I3 o+ A8 [- y3 d! k, d2 t
to regrow-grass7 a6 {9 P0 n% u8 b+ M6 z4 ]: ~" I
ask patches [5 t) N; X" g) N- h) z
if random 100 < 3 [ set pcolor green ]7 p, E" m, _2 h6 t8 D
]
% r# f: D( W; v# H* m+ f/ L7 q" F" mend
2 ^+ [( ~& _! I: E7 C6 vto do-plots
/ K% Y8 u' `* w2 I set-current-plot "Totals"7 K6 ~# Q) m0 W+ T3 U2 o
set-current-plot-pen "turtles"( f% V* j; |7 W
plot count turtles
+ s: b) P! h; B( {7 T5 { set-current-plot-pen "grass"
! c, M- P; V; v. G% @ plot count patches with [pcolor = green]6 C, Q7 ^) f7 U# h5 j4 p/ ?
end
6 ?0 g! x# a/ d+ T& `9 D* m3 ~, I可是运行时提示no such plot: "Totals"
. r8 [8 x( n4 F. m( D* A7 e/ ierror while observer running SET-CURRENT-PLOT5 H; n8 {7 x* k
called by procedure DO-PLOTS0 B& p5 Z" V9 N1 R
called by procedure SETUP3 W: ]! \3 D" |
called by 按钮 'setup'' Q* s: q: D5 z: j h( {$ }
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
