我编的程序如下turtles-own [energy]. }+ B8 C4 A" O# Z
to setup4 Q' u! ?- ~% g6 y) v, J
clear-all" B ]; w2 c8 q. p* X1 N
setup-patches% l. Z) G+ e% b& K& a
create-turtles 100/ t+ Q2 S$ B* B; U/ s( @7 e
do-plots
/ ^4 B& c: {4 s2 ^2 l ask turtles [ setxy random-xcor random-ycor ]
\ o% }( x Y1 G: m# uend
. p1 Z2 I" B8 S: r8 m+ fto go
1 \2 y/ c* Q' t! k0 o: U( Q move-turtles1 \# p* S2 g) R2 u' T
eat-grass) t# p; o! H% y# b" c! B" ^
reproduce) {" z# `2 M3 c, g
check-death+ S8 ^9 N6 ~- p/ R, S6 B
regrow-grass
' f9 q M+ z# P0 Q7 I, c. L# c do-plots
1 z+ v" e2 P+ s2 Rend n u6 W' g, m/ D5 U+ n6 h
to move-turtles( T6 w* }' v# q) R' U. H9 k: L
ask turtles [ ^3 V' p! s: b& w
right random 360
1 B8 W2 ]9 l* q" B& O& ^& x- H6 x forward 1# d* R% K% c0 G
set energy energy - 1
! d6 d1 @& U7 b' E: U8 l# F- W ]
0 w0 g9 w/ l0 B5 l$ W! aend* s8 A6 x U9 r ^. E ~ |' {4 F( I
to setup-patches7 A$ Z# I8 v* \, b9 \+ v& g
ask patches [ set pcolor green ]9 W. T7 Z5 s9 b) w6 A& H
end
0 N+ G7 b7 p" R' C7 j& Fto setup-turtles0 U: A, S! {( f' d; Y6 S* H6 e8 x- G
create-turtles 100+ S1 z) @ W8 q4 H: H' N
ask turtles [ setxy random-xcor random-ycor ]
! u* c" ^+ u# G) V% G0 Vend8 O- v: P% u* q
to eat-grass
) p, E b6 Q, J' {8 \: C ask turtles [- K8 H7 O* {% p) Z/ n/ G& `5 r. [
if pcolor = green [
$ y3 t' F4 b S, E. l set pcolor black" O5 V' l: t. K: E% W o; H
set energy (energy + 10)+ n$ {: w' o9 W% y
]
3 K) j% y' C& A ifelse show-energy?0 ?% o5 x- J- r0 o8 d
[ set label energy ]
0 T( O4 |8 D$ I1 e3 H' V# D [ set label "" ]% b0 x2 k8 e7 g7 M0 A4 `
]; D) Z( p4 o. M& o: D
end
" c0 o, \- ^- q+ {+ d& `7 @1 qto reproduce( _: c# b- P" J. _" q/ m
ask turtles [' p3 v) E# T; I) U( _6 b% T# B
if energy > 50 [* g& z' E" f8 }; Y0 Z# U6 W
set energy energy - 508 p( Z1 W8 s& A7 E2 V& b
hatch 1 [ set energy 50 ]) Y) n) i" f; H# F2 s) f1 T" H
]% W# |3 G `% N l) j4 }
]
& e! D7 P' F) i T8 P/ ]/ i0 Jend
8 l `, b4 D+ z& ^to check-death
8 O+ v; w) z5 G" J3 l9 k ask turtles [
' w! }( h# J5 d8 R* n4 a+ m/ _1 Z if energy <= 0 [ die ]
( z; E4 e/ }0 _6 ?. i d& _; ~ _: ^ ]; } _& o* \3 z9 |( M9 Y+ {4 n. L% [8 G* n
end: J" A% g; {+ B$ |: o, p+ k
to regrow-grass" S; u* a% s4 z) v
ask patches [
3 I$ ~! I: m2 N' x- Q m5 N if random 100 < 3 [ set pcolor green ]- p; t" {. }# U
]
) Q4 {6 a- v, y- J8 @; V5 wend6 y# W& U ^2 o: J& ^; ^
to do-plots
/ ?3 O5 C( q( f. @7 }7 G5 C$ V set-current-plot "Totals"
+ f1 c5 z' q7 Q. Z2 G# U% z set-current-plot-pen "turtles"
U8 y+ ~/ x% h( w- c7 q plot count turtles
! n W& @8 o9 v; t9 I9 T$ y3 P& I set-current-plot-pen "grass"
% X2 A# d- a3 s9 o plot count patches with [pcolor = green]
$ ^. {9 n. ~5 ]9 fend
_. H; N' g: ~/ i0 E) a4 N可是运行时提示no such plot: "Totals"+ J( }7 P2 p% U, ]) k
error while observer running SET-CURRENT-PLOT
! v8 @, l- x1 y& }& g. x called by procedure DO-PLOTS, H% V6 [& n1 `) v' h
called by procedure SETUP" z2 f6 H( b' n( n2 a
called by 按钮 'setup'$ G* n& Z: q+ o% I0 q" T
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
