我编的程序如下turtles-own [energy]
5 H) p i* M3 _2 Y" Y. L$ kto setup
i+ k8 Z8 i) @! i! a: l clear-all
1 b2 w2 \1 k0 J setup-patches
- k- L: [# K- {1 F2 K create-turtles 100
) l6 S1 f3 W$ e$ ]% i* [8 o: l do-plots6 V _. I7 c) a4 J T8 J' F# A' G
ask turtles [ setxy random-xcor random-ycor ]! ^6 d+ t& k( ~1 _$ W1 P0 S' a
end
/ x+ a. O% |9 s& D5 k# {& e1 Lto go! z6 v% R" d# O8 `& J7 U+ m7 z& h
move-turtles2 i5 v, x% ^3 y! |
eat-grass
% ~1 j0 U/ a! J1 z reproduce
1 v0 c U2 G3 s& I: J' N: Q. I check-death
6 U$ ]: @- y4 P$ Y# L6 u1 H regrow-grass
5 \" M7 y X* M, ~$ h- b do-plots
' r/ E0 p4 K' P4 Z/ i( [6 Dend
$ f; i; O! H6 Z. B e# d+ ]* Z" nto move-turtles
' m$ a: K% K/ _; w" S5 N( L ask turtles [
' x N- Y; ~6 k0 r/ E right random 360
7 h+ H2 B) n. b forward 1* j' c* S% ~) ]+ i
set energy energy - 1: P& P: m# m" K- i
]5 L3 U3 U/ U0 u; B+ Q
end
8 p" |/ ~: o$ A& T: qto setup-patches
( S- O" I3 n6 I$ b4 N$ W% \ ask patches [ set pcolor green ]$ s2 c: Q9 G6 B5 l/ C3 n9 B
end% r( ]. l: [# L- b" J
to setup-turtles6 r/ ^: L' J* A" g
create-turtles 100
# ?5 C6 V5 v$ J7 B$ N3 ^ ask turtles [ setxy random-xcor random-ycor ]' [& D: }- M7 Q% b: P+ J+ S2 v
end
! e$ f) x# k; G. sto eat-grass2 y7 B; _0 |+ C* Y; w% t
ask turtles [
3 {; z: Y& o4 g* T* _: y if pcolor = green [
6 [! K4 a- _6 G/ [- y set pcolor black# q9 x+ N# T4 D, q1 f
set energy (energy + 10)* S( A8 h* j {4 E N/ F- j6 _
]
8 L& N6 Z V7 g( D \( E/ u ifelse show-energy?8 ]9 B' ~6 m2 X) j( f: G) ?+ q
[ set label energy ]* v0 V- \6 E3 X6 T* e1 k5 e
[ set label "" ]
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end
; m. I- I! P! Sto reproduce* y' ~9 y0 O: B$ Q# I5 C( [
ask turtles [: N# G0 a# ] t& H
if energy > 50 [
5 V& g5 t+ A& h2 w set energy energy - 50& g' X$ y B: Q4 L9 j. m$ x
hatch 1 [ set energy 50 ]
. D3 S4 C9 j& ~! w% _0 t( e6 y ]& z- @- a/ D' x1 s
], ?8 Z7 \4 r( R/ f! ~: U P3 h
end
1 O0 R: q9 R" a5 @6 K+ [# @to check-death
5 ]4 B: f- @+ Y' Y; J" f ask turtles [6 k6 k* e. T% G" U
if energy <= 0 [ die ]! N* ?- b+ f6 z! q) F& r9 Z
]
; V4 s T; X# X4 y. G/ @end* G; e' j% r8 r+ {
to regrow-grass' V, G3 Q; U+ }
ask patches [
% M# F% H# m/ z( S1 B if random 100 < 3 [ set pcolor green ]% i8 { E, y1 s7 o
]- h# L; r; u0 M
end X9 o% e+ U! v! h* I
to do-plots
2 E" `$ l, }! P) d. c8 h set-current-plot "Totals"! s5 z5 f/ l* y
set-current-plot-pen "turtles"& h# B l* H" f& ?( a
plot count turtles! |8 F1 k, b3 ^
set-current-plot-pen "grass"! k ?% g' {8 F. y$ @# I
plot count patches with [pcolor = green]
, m* @6 [% s" t* R. K( A- n& mend
; W) L! |& w9 B可是运行时提示no such plot: "Totals"
& a0 C7 Z# F6 K2 Kerror while observer running SET-CURRENT-PLOT9 G. V: `& x. ~- {+ S
called by procedure DO-PLOTS# L5 ~- Y8 T8 o+ }& x; d
called by procedure SETUP$ V0 t/ ~, W0 ^7 m/ S" x
called by 按钮 'setup'
1 F" p4 e( p) |求大神解答啊 |