我编的程序如下turtles-own [energy]& ?& L% w! a# o7 g$ U+ b
to setup
+ b, N- L; o# `* i! k; V& o clear-all8 Z* G( X# e# {' \+ J: F
setup-patches
: j4 Q- L4 O. F8 ` t# G+ O create-turtles 100% r4 m$ v3 n3 v5 p
do-plots! V; _4 t) q0 h6 w8 Y% S
ask turtles [ setxy random-xcor random-ycor ]) O$ _7 [9 T' |. j& _8 r
end( _+ N# M. ~. ?# d1 e) R
to go3 B* B* H2 j$ {+ j' o2 c' ^
move-turtles H. Z5 _% i) d6 Z) v3 Y k |& ^
eat-grass
2 [5 q: i6 ^# q6 g1 O- \ reproduce
/ [) w, C0 r5 f4 L# B check-death
" y: T; v$ z2 ?' Z regrow-grass
- D2 B, i2 t" ?3 u2 Y# d3 } do-plots! \( r+ f" q; v8 s
end E+ @) B0 S. o. ~! J1 T
to move-turtles. a- y/ P; v2 ?, ^" ^( H
ask turtles [4 y# a6 _5 |1 ~
right random 360
, G$ }* b; f. t forward 1
; l s$ ?6 k) _& _2 O" H+ ?4 W set energy energy - 1
, C& a/ U* ^7 T/ h. p( J$ j ]8 W! G/ z$ ~6 E& M* s+ F
end
; K' \3 P5 i( ?' R" z/ tto setup-patches* k7 h8 \; P; }# R U' e4 t, e# t
ask patches [ set pcolor green ]
: Y E8 W3 B0 l# fend
# ^) w; |1 e: }. T G5 jto setup-turtles
! f$ R3 _) q, `" k* l. ~& M2 }+ H create-turtles 100
+ E1 U9 g3 r2 c4 h" l* [3 }8 h8 l ask turtles [ setxy random-xcor random-ycor ]. Z, u" a& X K9 ^5 ]0 s
end
/ j" h3 L5 p) n! {) }/ fto eat-grass
8 E! n1 N; F7 _, _1 D, M G0 _ ask turtles [
) a. I2 D6 y/ h7 ]9 h if pcolor = green [0 @( D) d$ t* N6 x. E( I' }
set pcolor black
8 Q: h+ s: b; F3 c4 ?3 C% w, d4 R% Q set energy (energy + 10)
' ^' p* J9 a0 `$ D. N8 m ]; G/ C; S7 L- g- U: o& T; |& ^' H
ifelse show-energy?
- F+ c2 H* O) Z# [+ Q+ v1 c3 m [ set label energy ]
, \6 \$ L( G) X$ U U& s" w [ set label "" ], t, e. Y' g% ^3 U7 M" Y9 H$ u( j
]+ P" X8 k- j. S8 y# f4 q
end
- M* K3 l) e# g4 \- ]to reproduce
. o* c% U$ ]8 T; e" z: B6 B ask turtles [, r. {* B2 u, f% c
if energy > 50 [# i0 N0 F7 }' P" i6 }
set energy energy - 50
* @2 k6 a5 c0 \+ G hatch 1 [ set energy 50 ]4 i7 `4 q- q! f' O2 s3 S3 S
]9 u, H& T4 N0 q
]! y6 O) ~" D( Q+ q
end8 e# ~' w' n; R- Z/ ]
to check-death
" C& b+ `- y# q3 F$ X* S9 j/ E& k ask turtles [2 m; \* }) O! u' A- I; X% i
if energy <= 0 [ die ]# l0 E* g3 l3 c4 a
]
- l( |" O; V; L" V3 c! e# z; send6 ^& e2 T& v) J8 R* f" A
to regrow-grass" N3 U6 u- m ~" t8 X
ask patches [
" S! d) d A2 A8 A2 e% R" y7 k if random 100 < 3 [ set pcolor green ]3 r# P, T, K9 w, T# w. |* m' z+ i4 x
]+ e- t9 a, R8 @* Y T' f5 C! p
end) e* f, H5 G2 T6 A" z$ |9 {1 c
to do-plots* m9 w: ?! g* _( h/ C
set-current-plot "Totals"+ A% G' C7 K& u) ~0 T
set-current-plot-pen "turtles"6 a# d* a) c$ V
plot count turtles" {# C2 C8 C7 ]6 p
set-current-plot-pen "grass"
" R0 z: g) F! n7 u/ P/ G v plot count patches with [pcolor = green]- K5 c, [4 `" F: D4 O: k; ?
end
8 V n7 w$ W% ^( k% l可是运行时提示no such plot: "Totals"/ l' ?; x/ T$ U0 j) c. s7 A1 b
error while observer running SET-CURRENT-PLOT
8 `6 }: d. m- v" |- L called by procedure DO-PLOTS) q: u" {5 ^0 U* R: e2 L
called by procedure SETUP7 b' P* J0 o3 @9 b( L
called by 按钮 'setup'+ s4 c* k( O) O1 s4 L/ v, U5 J
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
