我编的程序如下turtles-own [energy]
) n! X, O& g$ b8 zto setup& n b; e# v7 u: j
clear-all
3 c- K5 @' c q+ I- Q; Q1 u7 t setup-patches5 x0 K" p5 B' V. H9 Z$ `
create-turtles 1007 K5 J* w/ O. A$ H% M
do-plots- E; C2 u1 S) H( ]3 c
ask turtles [ setxy random-xcor random-ycor ]0 n- ?. K E$ P% W9 _1 d
end
0 d# \' I' a4 M" d8 \7 Jto go( |5 }7 Y7 z7 U5 Q$ B
move-turtles5 t6 ~$ e+ Z3 y4 M5 Z( _% E7 F
eat-grass
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check-death- V( ?# z2 W% M# I8 r+ `
regrow-grass1 ?2 u2 U! p) M0 x# I- w
do-plots5 U9 z/ X8 G3 w' H
end
7 N4 M% W' k5 K+ J- C) g# \1 tto move-turtles3 _' c& W; q8 M9 \) V& D. R$ I
ask turtles [
# {5 F3 @) }# E right random 3607 c" D6 Y- @7 ` |! A3 c2 s7 r
forward 11 t* _3 [+ c* P2 b5 x* E. O1 B
set energy energy - 1 u" e* Q& Y1 \
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end
/ r0 l# J7 T+ `0 mto setup-patches
, a& I+ k7 `5 k$ i ask patches [ set pcolor green ]
5 w& W6 H6 J+ R# ]. g/ Gend5 m3 n. r, m( n. a; q4 B
to setup-turtles
* t5 @5 Y) @$ `0 j/ |6 h1 | create-turtles 1001 ]5 r4 Y5 m9 N7 U' M
ask turtles [ setxy random-xcor random-ycor ]. s2 W7 P& |* z4 o1 q
end
8 F. {1 d2 i3 g3 Q) J; n0 p- H$ @to eat-grass
# l5 `& I1 L+ f e8 U- D6 c ask turtles [
% l7 O2 [9 ]& W7 r/ }: `) I8 j: d if pcolor = green [0 r1 D; m7 m( N4 s# w" ]* E1 t" L
set pcolor black; G. a5 ^0 I- m# B: A3 k- b
set energy (energy + 10)
9 F- a! k) ~4 e2 J ]
! K& L. O5 ]% w* h- \) H4 Z! a ifelse show-energy?
( T/ t) q$ N3 T L6 W$ J: }) Y5 Q [ set label energy ]
1 U: ]/ J6 g5 B2 }/ V, K [ set label "" ]6 ~6 e7 ~% S, @5 i! q2 g4 h
]2 C9 V0 c2 A4 W( X
end0 n8 ]% P% [* ~0 ?% ]5 e
to reproduce
; P6 U6 `6 y9 x( |5 Q% S ask turtles [- z/ u6 K- A, w) ^3 N
if energy > 50 [
7 v/ {# {6 j. ~ set energy energy - 50
1 w' G# K& \' ]7 c3 R2 R$ s+ W hatch 1 [ set energy 50 ]
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]; c2 p8 P& Y! i. n
end
6 u( q) S* K' U4 H8 rto check-death
' l* y& f& c) _5 v; |0 a0 [ ask turtles [! T# t! b6 t( l1 X+ z: ~& n
if energy <= 0 [ die ]
! {; h6 S) S6 \7 k5 g ]
. r2 H. S! M# T/ `- I+ Pend, M4 O8 {* r& @" T( q' n) ~8 u* J9 ` b
to regrow-grass$ K f6 b4 O. W& T
ask patches [/ T8 M% Q( v; I) N% a. l/ E
if random 100 < 3 [ set pcolor green ]+ E1 z( t" n: ^0 ~, u) I. \
]
/ D* {0 h7 I% M: v) Q7 gend3 B1 i+ q$ L6 B q" A! i
to do-plots) v' D0 r" O7 g
set-current-plot "Totals"4 C5 L! S# n' c
set-current-plot-pen "turtles"+ u. M& s _% E: E; h; N# j0 F/ |
plot count turtles
3 U7 Y/ C( D0 n! y& f set-current-plot-pen "grass"4 D9 @1 j+ B2 Z" N. t
plot count patches with [pcolor = green]
/ p6 L4 l1 W% y3 w: @% ?7 z- U2 s4 uend
8 R8 c/ ^7 o: o$ o/ G5 z可是运行时提示no such plot: "Totals"
& @( B7 i5 ?: L; ~% U7 U; Q" Rerror while observer running SET-CURRENT-PLOT6 T- }0 w, N7 Q: h0 f2 O: \' J
called by procedure DO-PLOTS3 g! V: d/ v$ Q) [/ J: v- n
called by procedure SETUP
+ j" G9 Z$ S) p" t. _( X" @ called by 按钮 'setup'
7 d( s5 b2 ~$ B求大神解答啊 |