我编的程序如下turtles-own [energy]0 ~. T. I9 i* A3 i4 z3 `& X9 ?
to setup
0 E1 J8 \ @) L1 e' F9 w clear-all
: ~( ~( e% `- i" u) _: q; R. F/ s9 S setup-patches
$ ]2 ~- ? h8 D# w& ] create-turtles 100- A9 x( i- s- U: Q2 u$ Z9 c0 M. k
do-plots( M4 h/ t/ Y2 B- k; u. f
ask turtles [ setxy random-xcor random-ycor ]
$ Z& y3 p# p: i: R; Y8 t5 \- m) ]end$ f+ J" J# @" I7 N c
to go# F g6 J+ j. S4 n( z) D1 s+ m- ?
move-turtles( W9 @* T; J, j1 T) J
eat-grass/ D* J% x% G8 a% l k$ a
reproduce! ^3 k1 G3 g. V1 {1 Z7 U: o8 P
check-death
5 j3 v- C0 F% L& l& F3 A regrow-grass' |7 `- k9 \2 v M( Z6 c, Y9 |
do-plots
9 M8 R/ A. P9 o% L; mend5 b& E% @& H/ J6 f- `+ N& k
to move-turtles
0 Y+ g) N; H, d) Z! K ask turtles [
3 v$ y" A9 k) B right random 360
6 o' K3 e4 X9 x; {& x forward 1" [7 I% Q" Z& t2 t
set energy energy - 1! J; t1 _- q( M' O. b) q1 I+ c
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end- k0 q7 z4 f, v7 ?7 z' J
to setup-patches
1 [& d4 ]) \5 l6 Z' k1 W+ d ask patches [ set pcolor green ]
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to setup-turtles7 T1 Z, b Y6 M# u4 I# S8 }% T# ^
create-turtles 100# @9 C& O% h4 _% s6 Y/ e8 a; |
ask turtles [ setxy random-xcor random-ycor ]
) @/ l- H" z) y& Tend- J% A: v, G! n. N$ R, V
to eat-grass
# {2 `* _! c$ }" i, C3 o ask turtles [
- k4 E! E% c! V8 w- r if pcolor = green [
. i0 H' k7 U% G0 q$ Q, B8 C set pcolor black. e# w5 e* P& _, k9 q, m
set energy (energy + 10)4 |( Q+ F- ]. F! a ]" [8 }
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ifelse show-energy?0 U0 v, i( p! v' d6 [
[ set label energy ]! [# i: h9 Q7 x8 U' v1 x7 k5 s! Q( y
[ set label "" ]: o: O5 \3 l0 ?' ^
]2 I- c, o7 U$ y( G/ E% i. R
end6 o# s+ U5 `' A+ `) K2 O/ b
to reproduce
5 C$ w# b; { f) \, N ask turtles [' n# K3 y& |. p2 g4 u
if energy > 50 [
Q0 v) M1 j* ~! `" `+ T* `) B set energy energy - 50
/ U$ W. `; W" `/ E9 _ hatch 1 [ set energy 50 ]* S4 g& q T5 A, u" K
]
$ I/ I+ I3 l0 _, H4 e1 H ]1 ] @) _- ~- F) z' _ m: \0 T
end
& d: a) u$ I R# [$ fto check-death
! U- D8 K5 H& N- L! f8 ~0 l5 R7 ?$ N ask turtles [" m) E; { \: v# B/ L5 e/ z
if energy <= 0 [ die ]
/ J) h3 T i# C1 l) N# Q% n) j& H5 ~ ]
3 x" ] C4 Y o3 h( t% B$ Aend7 D8 D% W7 K& T7 `" E5 X# W; M0 c
to regrow-grass
1 g) c0 N7 ~) n8 \ ask patches [: G' @* M; ^4 H0 j' }
if random 100 < 3 [ set pcolor green ]
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end+ `$ a1 [6 o8 X+ o( a2 i' ~6 A+ L
to do-plots7 M& S- j7 n5 z+ l
set-current-plot "Totals"
$ @" s' b- a7 _1 E) A Z set-current-plot-pen "turtles"& E: ~& G# a% D7 `! b; E
plot count turtles
$ U1 q/ c% m" T2 Q2 F2 P set-current-plot-pen "grass"
6 ?0 Q% W: l" w' R; D2 I3 h plot count patches with [pcolor = green]
( {+ h+ w$ d. [! mend
M3 l5 L8 D8 z m- ^9 C) j$ ~可是运行时提示no such plot: "Totals"
, |0 Y% Y/ k4 W9 \7 b9 B& oerror while observer running SET-CURRENT-PLOT+ U% c) z2 U$ b8 [0 P) ^
called by procedure DO-PLOTS
+ r4 J8 Z7 | l$ m8 I2 r called by procedure SETUP
- U1 a7 V; f( Y! n* J2 \! m' [( J g7 U called by 按钮 'setup'
( P% J2 G3 R7 X+ s' M3 U求大神解答啊 |