我编的程序如下turtles-own [energy]
( O3 _' A0 A& y+ C( n! _- ]9 C xto setup
3 a n, w; d7 c) w3 Z! D clear-all
: [0 g$ n% t; x- W' t$ O setup-patches6 @- W; f% d, ] R
create-turtles 100% w3 R7 {1 _; k
do-plots
2 W# Q" X; z8 g ask turtles [ setxy random-xcor random-ycor ]
2 i5 d v% f" W% L- o5 z& nend+ B" `, s0 Y6 `: A5 h% @2 t
to go
, d* S' }- W% d* C move-turtles
/ U/ A r& a, H8 ?; i eat-grass
* R* f* _8 x8 v, h9 q4 K4 ^ reproduce$ \% f Q& l; f* F D
check-death
% \5 ~9 Y3 u8 ~: h$ P' ~" o regrow-grass. o" k# @7 H: k/ i; V. M7 ~' J
do-plots
+ S9 q8 C( v4 i& q; w8 a$ qend
6 l4 { N" j0 @% r& N9 cto move-turtles
; K4 N! P: j( L+ U+ Q' `( S' A6 ? ask turtles [7 _: @ y. a0 E* o
right random 360
2 O8 @1 M0 @% Y5 w5 c forward 1
7 G' m3 [9 A8 o9 L7 h, T set energy energy - 1
9 I3 J, j. F [0 Y# D6 _ ]
1 C9 X- y) G# s1 z9 ]end( f2 u% ^, m( B/ H
to setup-patches
* k( d8 }' W) x) [! E ask patches [ set pcolor green ]
3 k; g8 U' M% ]2 aend& z: U3 I/ [2 P5 Y& N3 I
to setup-turtles
- ?7 k) P7 W7 ~' H b4 ~/ b' L create-turtles 100
+ E1 b' p8 G5 K8 W$ }! J ask turtles [ setxy random-xcor random-ycor ]5 b! b7 K" X8 r, Y& d
end% E+ a s/ C; m3 U
to eat-grass; c, [' v/ j1 R7 W2 l
ask turtles [
, X/ K# s- l! z; G* N8 g9 ^ if pcolor = green [
$ [, F0 ~8 @9 n/ ^( E! g# F/ S0 q set pcolor black
4 e8 q6 e7 B) U/ d- M set energy (energy + 10)
' F) [5 M k* V5 e5 p& h8 { ]
8 q+ o# g6 y4 U0 V6 U9 I1 { ifelse show-energy?+ i! P1 Z) z4 O1 |! `8 L
[ set label energy ]
* x/ ]9 w/ @& o% E/ d9 R [ set label "" ]
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end
# L" a9 y3 G! s' hto reproduce
& v; _! ^# G' g0 k' n* } ask turtles [
+ \& r; h: W# `+ b- I U if energy > 50 [
9 f) g9 C" M' x5 f+ F set energy energy - 50
8 C* q" b- ^% `- i hatch 1 [ set energy 50 ]4 ~" H# q) `# d2 c
]% n' G2 g& Y3 f5 G
]9 H" u- L; [1 W2 k. m
end
, v; w8 t0 x$ hto check-death$ h8 h+ j9 U/ E( }" e9 \9 r
ask turtles [
: b4 D7 H0 I0 m% F if energy <= 0 [ die ]. _7 m* j5 v3 b* w, P
]
9 @- r9 `+ `; E3 e6 L9 ]6 ]& Aend; p4 H1 B/ j. S1 F, O% R
to regrow-grass4 a/ Y& i7 ^% P0 S) p" W$ S7 ?& y6 _
ask patches [
6 p6 W+ S1 G& | if random 100 < 3 [ set pcolor green ]5 M3 K. \! J! }! g5 r
]
4 ~) |8 x8 q8 ~ F2 gend
* ?/ t; I0 T5 P1 h$ ^; o9 Mto do-plots- H3 X8 g9 \1 {( Y% T2 o4 o
set-current-plot "Totals"+ n l$ X( Z @7 Y* r6 p. |
set-current-plot-pen "turtles", z* k6 m2 G- i. _
plot count turtles
: Q- l0 t( Q- I0 y2 T% Y3 ]& W set-current-plot-pen "grass"
+ @ }0 R7 C; o- ^; j& ]/ X plot count patches with [pcolor = green]
G- P( k) N4 dend
. |9 u8 \8 u: U7 h可是运行时提示no such plot: "Totals"
+ w) r$ B2 E9 derror while observer running SET-CURRENT-PLOT8 a' ^/ N( O1 y, g/ G" S3 I. F
called by procedure DO-PLOTS- \$ X1 B/ P, a/ o6 d6 m$ \
called by procedure SETUP
`5 ]3 L3 w9 K" {0 l called by 按钮 'setup'
& d, d9 y' A l求大神解答啊 |