我编的程序如下turtles-own [energy]* b! f- E1 V1 j
to setup
d* A4 e6 j' n) m+ ?1 i$ r clear-all3 M. a; G1 Y) q' N7 ?4 j
setup-patches
2 _% A- T7 A7 [7 t9 C3 @1 J create-turtles 100
+ O- m8 n/ z* q: I: Q4 e do-plots
. i3 H f! z# J( z, ^ ask turtles [ setxy random-xcor random-ycor ]* x/ W3 j4 ]0 M& W# \
end% L/ B6 \& |8 h5 P7 F
to go
6 I. q' q/ P$ N/ j$ B$ e move-turtles
$ M+ l3 v2 }8 M2 F eat-grass: i1 Q0 Z8 h- ^; R8 P
reproduce3 L2 C* _2 [; w" ?1 _
check-death
9 V& x0 r |# j1 U( Y regrow-grass+ S, _/ ~& Z3 N* D
do-plots
# S! Q# @5 `1 E' A. Q1 I" N, Dend A* v1 T% k# [9 P0 e+ s
to move-turtles
5 {& H- w8 e4 K1 m ask turtles [% N8 F( y* S7 D3 g; ]4 p
right random 360
( b/ R4 Y$ y, u! ]# w* B) V forward 1( K5 c% r$ y, _4 C' L1 d0 Q
set energy energy - 1
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end
2 p% v, R$ L9 Q6 L, S c ^to setup-patches
5 W& X7 ?; w9 V( V [- l ask patches [ set pcolor green ]
# D. ` v' D: K: `' hend
}: R! L5 f+ Y8 f9 f- Tto setup-turtles7 ^) B, I7 J2 Z% D
create-turtles 100
4 l, h- J8 ^% \5 ]8 \ ask turtles [ setxy random-xcor random-ycor ]6 q9 M; z, `0 p: R0 r1 G
end
% m2 P8 i3 n5 F! yto eat-grass3 D: [) Z0 }2 e# b* m& I/ ~2 w. d
ask turtles [
+ F- D9 _4 ?5 v% t+ Z$ E if pcolor = green [
# n) X; P! P, T set pcolor black4 m' E/ E7 |$ U# Z s
set energy (energy + 10)
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ifelse show-energy?
' {; _( ]1 j. |( _6 Y [ set label energy ]
8 A% y6 f6 O( u4 I [ set label "" ]0 v9 c: p, c3 y$ o% X" _+ r! U a
]9 G; V: M( ? ]* A
end
% t4 }; P+ ?5 m, y! Oto reproduce
! h( r2 z$ y/ I s' W3 J ask turtles [/ g4 o$ h' ^& J5 z
if energy > 50 [3 d) G+ J9 n9 m4 Q4 [1 W% E
set energy energy - 50/ b. I0 { b2 F
hatch 1 [ set energy 50 ]8 O% d9 H& _ f8 j; l
]. _: n- R% I/ I$ L: I% ]3 @
]
- e! b' g8 c: K' F8 N& a% I% `$ hend" ^+ ~1 m' m' H1 \
to check-death7 u( u! F: y( e9 h( A% s
ask turtles [
+ A/ q: ?$ P0 [; V" z$ z4 E if energy <= 0 [ die ]
" @: n* n- N& d/ ~9 \" g. X0 K& {5 n ]
, p4 f5 u# ?6 oend
/ |5 l. X5 S9 J9 f, ~$ `to regrow-grass5 e1 c1 _" I/ ]: A" g) n9 O( S; \
ask patches [
`- T7 a8 ^* Q2 x/ E( R if random 100 < 3 [ set pcolor green ]! f) u. p' J( ]6 _4 c5 u
], x0 w s& x% o+ c8 B* Z
end. ~7 a9 s) ?+ V3 i
to do-plots
" L! e4 c+ E# M" L set-current-plot "Totals"
y% `% y& f7 W4 `, q/ g set-current-plot-pen "turtles"
3 k4 N" |1 R& B$ a plot count turtles
2 j$ h" R0 }; q7 g set-current-plot-pen "grass"( ]* J: R) |" o! V* M4 W# w; J0 L
plot count patches with [pcolor = green]
+ i: a/ A7 {# |0 _ H, G. hend
% [1 U" \8 N5 N1 E% ~( o0 l; q5 e8 V, o8 [可是运行时提示no such plot: "Totals"4 u3 X1 N C' R& g0 a" H
error while observer running SET-CURRENT-PLOT8 }5 g, _4 z: }0 e9 T" j! d% j
called by procedure DO-PLOTS
: Z' { [( `1 [) L0 Y4 L called by procedure SETUP% P- X6 {. N- Z9 n& r
called by 按钮 'setup'
( V% K! O' g; s2 s/ ^7 @求大神解答啊 |