我编的程序如下turtles-own [energy]8 S5 ?& S& I+ T6 c3 ^9 |6 s6 U8 S
to setup, z9 I( h7 X& c# p
clear-all" v% W3 C! B2 L
setup-patches5 m; W6 \' L2 ^# J/ ?8 K( `0 u* J7 w; ? R
create-turtles 1008 b$ p& Z+ H0 ~) [
do-plots
7 J+ K& x+ j: E. O" C ask turtles [ setxy random-xcor random-ycor ]
4 g* q( p x% J& |( ]' O- rend% e3 G: p6 V5 T8 ]3 e
to go7 {+ S' M; F0 h# I) Q3 N+ E
move-turtles
# N2 n5 B* ~1 e, v$ S eat-grass+ r4 [4 R; H& Y. {, W! u
reproduce
# P0 b& C- K- e, I y check-death
" i# |6 l, k# V3 U regrow-grass( a# s6 D |1 e& b# o. K* M8 P' q
do-plots8 @, y$ F* o P2 I
end' j/ ?( h' u5 ~. }$ V- ^- D
to move-turtles
, b8 T0 {! Y# A* o: p ask turtles [
- D; b# P$ ~8 R+ }! S right random 360
! B. x; `4 U$ U0 x A/ | forward 1
" |9 x6 o8 m% [8 Y; {9 {% P set energy energy - 1
7 x6 p: S5 ]( j. t' n; t ]# P, M, ]7 g2 Z/ `" \
end
# z3 P" @) |+ }2 E1 b: M' Zto setup-patches
5 C; e/ U+ Q3 F2 l3 m) S: K7 @ ask patches [ set pcolor green ]* a9 S' I3 y5 N( L# F0 m' F+ _
end# X% s7 F4 N: d# d# s% ]; n! P+ T
to setup-turtles
% c8 w0 E2 R# u4 u create-turtles 1009 n3 O# d9 v$ h- y5 E- h, x' n
ask turtles [ setxy random-xcor random-ycor ]
" p/ C4 e+ F h6 X+ J/ k5 cend' E& p/ l7 ]+ Q }: q
to eat-grass
3 w$ C+ F% o+ c8 [1 F ask turtles [" j! ~" s) M- B% P5 ]9 Q+ _$ G/ |. {
if pcolor = green [0 N- N1 P; ^5 ]$ I! d/ k
set pcolor black
6 y1 H* K9 `0 D+ f; I+ Z set energy (energy + 10)
5 C2 b0 j+ v5 {. ?5 {$ J# T* |1 g3 F ]
: B7 N& v0 }' { p6 c/ S' x8 l4 b ifelse show-energy?( Y g1 U& t, ^* Q1 D
[ set label energy ]
4 t6 y" w0 v0 t3 G3 Y4 |* D [ set label "" ] y8 t" X* a9 ?" @$ G8 |
] S9 B' E4 c; r& Z8 c
end
6 y; a5 G: Y4 {2 ito reproduce
5 U' l$ @. H2 b. @) I! Q ask turtles [7 W* |& {" ]9 o9 B6 k) D; O
if energy > 50 [
- H$ f8 s* Q0 ]' d set energy energy - 50
/ a% A* q" M& t c" A hatch 1 [ set energy 50 ]& z/ a, F1 W% k
]
8 {2 v. U3 i+ M2 P/ H, { ]6 o7 H9 s+ \; ~2 G" a, n
end
* ?% P! J# |( `% Dto check-death
! {: [- Z: D W7 r4 A+ f ask turtles [
' }7 B. {1 |4 y- c- d if energy <= 0 [ die ]
# A" U. {( i/ v3 G, I$ z$ X9 R ]5 c9 ^& |- Z' j( |+ p
end# G5 M, ?/ w3 Y; v
to regrow-grass
, p) v9 M! j& Y1 P4 p) \- R s ask patches [
* Q. Q# T" }" y3 L0 {" R8 m: } if random 100 < 3 [ set pcolor green ]) \7 X$ @4 O8 T$ q, Y' l( ~
]
; y+ F/ o8 r. C2 [end
; @& w: n& k) d# P9 @to do-plots
% F8 B6 v9 v% X2 e' g \ set-current-plot "Totals"0 ~" B# V. _3 v) G$ P
set-current-plot-pen "turtles" ~$ l2 G; m) Z; @: K9 m& M6 G2 g2 Q
plot count turtles6 ?* N* q3 x2 @
set-current-plot-pen "grass"& e9 H$ H; B% H: y) R
plot count patches with [pcolor = green]
/ w) ^) X) ?3 [! n0 w5 N. mend
% \2 ~$ ~" V3 g ~( X: A5 d可是运行时提示no such plot: "Totals"$ E: y3 k, l; K
error while observer running SET-CURRENT-PLOT6 G' d9 D$ V6 f L: T3 f" |, @
called by procedure DO-PLOTS5 n, L- X1 R0 O5 C
called by procedure SETUP% y! u% Z }! t/ ~* p
called by 按钮 'setup'
/ A8 L* ^- B: n& ~ \! U求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
