我编的程序如下turtles-own [energy]
; D1 f8 r' p- L c( b0 U$ Lto setup
2 j% M8 i1 R6 E9 @; s; m5 z clear-all
1 P0 `: H. K6 y# A- e9 H+ R setup-patches$ j: S6 [3 Y; d. K
create-turtles 1009 [$ s" x) H* A2 g9 o, S0 J
do-plots+ D1 b# G. {9 a2 P" Z
ask turtles [ setxy random-xcor random-ycor ]
- }6 B* g; E, J( {- T( T' cend8 [) i$ `/ ~! ]5 K) N7 r: ^
to go
, W4 l! O# j9 N8 g1 M move-turtles5 `$ B" ~- g% U! g( k* z
eat-grass
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check-death, `, C P( a8 T. i
regrow-grass9 F' s- }) R6 R9 Z h
do-plots
C M2 N4 Q/ W6 z( Rend: Y1 s5 Y3 Y" z' Y9 m' f
to move-turtles
) p5 y( A, ?9 x/ L+ l ask turtles [/ f7 f6 b% A3 I- p. U
right random 360
, P; V3 Q3 T8 n/ o- o$ ?7 ?) f/ } forward 1
6 h% [: W# J8 Y6 D* B G set energy energy - 1
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end
# m# g4 x4 G2 ?+ V1 wto setup-patches
1 F! r. X$ h/ A7 N" a M; u ask patches [ set pcolor green ]$ `$ g! u0 t; T
end
& s- `8 q4 i9 [6 s$ ] |: g, Fto setup-turtles
/ Y }& `$ K. N0 e create-turtles 100! M+ b: u& H: B, U8 Q
ask turtles [ setxy random-xcor random-ycor ]' G7 \0 T% q1 |. D. ^) l! j5 B
end- ]2 q$ i' ?) g6 x( t
to eat-grass5 ?8 ?9 V3 c/ d# r6 o9 U+ y+ s
ask turtles [
5 n! I! X4 R4 L7 l. F+ T4 u: L- S P6 [ if pcolor = green [7 Y% o% Q6 r) I; T6 x' x
set pcolor black
7 z/ d+ Q3 _! C( N# W, n/ _ set energy (energy + 10)8 m8 u" H2 m' @7 q/ q
]
' N" j% h. y9 Y& h: L4 n7 b ifelse show-energy?
8 v5 ]# N% U* W0 p1 g- _+ S [ set label energy ]. x- m6 u1 @( D( P& s2 s7 e. L) G7 e& U
[ set label "" ]7 m g6 B c* a5 _: v
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end! o4 l4 ~. Y' ~) i6 s
to reproduce
) {( Z; b' A! V& m7 H7 } ask turtles [
+ l2 u( I- K; i9 K0 x3 M5 }- D if energy > 50 [9 D* Y8 g. j$ D$ B7 H
set energy energy - 50
! y- Q. L7 }% N; x w' v# } hatch 1 [ set energy 50 ]) ]$ ~3 m& H) P$ |# J. A5 @
]
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end# C2 N7 x! \9 u" J# |% K6 U& x
to check-death
7 `* K/ y5 n6 ]. ^" A ask turtles [
/ Y9 c, K9 f% H* | if energy <= 0 [ die ]
+ G4 R( _- G% N ]
/ f$ P! M0 C' ]6 ?end
9 W2 e& y; C' c2 xto regrow-grass8 d' P2 \9 @& E' Q' o/ `* f
ask patches [
; l# C) y1 f9 c' n if random 100 < 3 [ set pcolor green ]
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end0 P1 V7 r* M' H( n' h
to do-plots7 `' r$ N, j9 L5 D2 a
set-current-plot "Totals"( k$ Q4 [" U: H- u$ s5 r* o8 z
set-current-plot-pen "turtles"
/ ^5 U6 @2 T5 n& j/ V& e plot count turtles
& t$ |& q3 Y0 G; X( K set-current-plot-pen "grass"
; y Q) y) Y# R4 F7 T8 Z5 e' s plot count patches with [pcolor = green]
1 O l2 D1 r; r' s9 ~end0 q, {- [! ^% I& h
可是运行时提示no such plot: "Totals"
+ }% F- o h' X/ G3 U. V2 G) oerror while observer running SET-CURRENT-PLOT- R2 d* ~, f( q3 n1 X
called by procedure DO-PLOTS8 J( T: k; P3 O. R, X L
called by procedure SETUP
" T7 `5 P* |+ R: b$ m* S& n called by 按钮 'setup'9 @7 C! n9 j- b8 m) \
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
