我编的程序如下turtles-own [energy]# `2 {: C9 N' J
to setup
- @7 y0 w& ~, Q6 \: v! Y7 l- M clear-all
5 ]4 X; h% e* ? setup-patches T- n% T. L: \1 }/ B
create-turtles 1007 f9 I& J J. n' r3 a
do-plots2 k) p/ \' `% z5 K
ask turtles [ setxy random-xcor random-ycor ]( R, |* V; E8 e' O0 F6 X
end7 y2 s: w6 o/ T! e, O3 }0 d/ T
to go
, ` e1 ]5 j5 e move-turtles1 V1 @: d7 E8 o7 C/ R0 h4 I! Z
eat-grass0 H# E2 b' l1 w3 z6 R5 `0 K# }
reproduce/ j7 d& ^: O* Q9 p- j" z
check-death
& c- `, e9 D9 s# d8 I! w$ n% W regrow-grass
- ]7 N2 _" u7 z( y) A" y do-plots
1 T2 V3 m( e" L2 y, g. {% [/ l# Zend/ p* l( s( T; I' W: ?! U) X: M
to move-turtles2 g" l, U/ @" {
ask turtles [
4 y- f7 v! H" J) Y right random 360
! f: {$ w2 @2 `1 Z8 O0 I! N; N forward 18 H% J$ M& B5 k+ ?2 _
set energy energy - 1
+ L+ n8 g( [9 {* p9 s. O7 [ ]3 s8 O ?+ S0 ]5 N) w* M
end" j, _4 y) v2 ~; t! v# a3 O
to setup-patches
) l0 ^& j: G. _1 `/ |) s ask patches [ set pcolor green ]
" f& N$ ]. e0 s8 N" Fend
( G' f5 h& d I0 ^to setup-turtles
! @& W1 S! S: a4 U* ^ create-turtles 1002 ^- D. X) P6 B# q0 d' H
ask turtles [ setxy random-xcor random-ycor ]
6 }: \/ z1 Y+ k4 h8 x: Mend
V" n* I' a9 a7 Pto eat-grass
1 e+ g/ x: L# x3 s1 K# m, d7 f ask turtles [
+ R$ [8 q# X5 d& J: i if pcolor = green [" b- W% ?3 {. C( O( R
set pcolor black
9 m! @2 U/ N/ V% w0 { set energy (energy + 10)
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ifelse show-energy?
+ r n, j) j, L+ p; R5 I9 M [ set label energy ]
" v" W9 c) H R2 y1 H [ set label "" ]2 \0 T6 F! ?) G- S
]2 ?% j1 T. u) n
end# O% K; U8 e. b# M) q4 H6 c
to reproduce9 r; k9 F" t' y$ r" u! O
ask turtles [
7 d5 W7 C+ f/ N5 Z6 `1 H, ` if energy > 50 [! ^% A9 r% U( e% C; W& R" @
set energy energy - 50
& d: c8 ^) f9 a2 S6 {# \ hatch 1 [ set energy 50 ]7 s$ j0 B* K. V& _! Q* W
]( }4 j! Q1 M6 B' u1 T! |
]3 r4 d2 ~: |! _+ {. x" z) }
end7 O: l& t' a0 T$ s' @
to check-death; ]" h4 i5 q- ~8 Q- |. O
ask turtles [
) V) M; ^, u4 A- c e5 ~ if energy <= 0 [ die ]
8 |# i q$ U1 l( }/ x ]
# e7 @! z# `5 B1 n9 N, ^. E5 s3 d8 Fend
, o, ?* j3 w; W- u( T& B, ?5 ] Yto regrow-grass3 S* g* g: ?8 I+ T3 F9 v2 J
ask patches [
) p7 C" r1 h% }# v if random 100 < 3 [ set pcolor green ]: a7 }* u( S9 A+ }5 `- z$ x
], {* ]: B7 Z; m% f1 m% u" f
end, `% P- Y( T6 \
to do-plots& |: M& n0 ?4 Z. D( _7 p9 C! P
set-current-plot "Totals"1 u% g' c! P7 Z6 f$ |' n. g
set-current-plot-pen "turtles"
9 o# D: @6 v7 u$ w& [ plot count turtles# P5 _: R) |8 l
set-current-plot-pen "grass"+ \4 M# |: R% u" z3 |- {
plot count patches with [pcolor = green]0 F% |; S$ ^/ I2 ]& Q: D8 G
end* S Q* J- K+ ~, a- I
可是运行时提示no such plot: "Totals"$ O" I" E% _% s% a$ t! ^
error while observer running SET-CURRENT-PLOT# {. a h' p" C8 B: |$ ]1 g8 b
called by procedure DO-PLOTS' S5 `- z: O, }, v" p
called by procedure SETUP
J: }8 x! d' r0 { called by 按钮 'setup' q; [' W- r* q/ M" t. F8 [5 V
求大神解答啊 |