我编的程序如下turtles-own [energy]
! _6 \ |/ a7 s X( Q Mto setup
& X1 }0 ]. h. e2 H6 g% u7 P$ E# P clear-all- a( f3 S7 h- G b* X) k" ]6 {/ K
setup-patches
& [1 v+ d* Z5 h1 T5 i6 C( L create-turtles 100
" W5 h% H' M/ h+ t% }6 F do-plots
+ c# G u- q9 N ask turtles [ setxy random-xcor random-ycor ]
) |; \' w+ d* S r. @* m) ]end h' @$ b6 }) i; q, }, f2 Q
to go
F) s N. o6 R1 o2 H move-turtles) g5 v/ D2 j" \4 E# a
eat-grass
( C. u; A6 }$ r* s0 K T reproduce
& ?* V& z' K+ o check-death
9 u V. B g$ \) [ regrow-grass
0 E8 X( l4 p/ i! ^3 y* J do-plots# ~) H/ U8 s$ x& k' @5 u
end
0 v U0 y# X* d4 ^! Mto move-turtles5 z! R, A q! P& Z" c2 [
ask turtles [' |3 F9 D$ [" v6 J# h
right random 360/ n+ ~+ C3 `. {0 M1 ~
forward 1/ @/ o% ~* K t( z
set energy energy - 1
- m- ^, u: W9 e4 k0 L7 D) Y ]2 Y$ i3 @* M/ h7 V/ J: W9 E# W
end4 Y3 p4 ~, J& H l L
to setup-patches
' l$ \7 L3 Q3 m' H/ [+ E1 H M ask patches [ set pcolor green ]; Z7 c: _0 j0 @. v' f: D4 O
end+ b$ ]- l" n# N4 ]2 w
to setup-turtles" e4 C7 P, g" H
create-turtles 100
+ s9 b0 U' S! Q0 L" p1 R ask turtles [ setxy random-xcor random-ycor ]
V2 `, j" F( e' @end
" ^3 Z. X' c" n- n8 kto eat-grass# I" M9 a1 I2 E, ^$ h( I/ L
ask turtles [
9 A; i% @4 V9 k0 K. {. t. u9 t if pcolor = green [7 V0 R- @. J% G0 N0 e1 O S
set pcolor black
8 Y# l8 L$ A# H" A/ p7 ` set energy (energy + 10)
1 q) W, \/ _) x; p% q ]
/ `, H R7 p, `3 h ifelse show-energy?6 D, [2 _4 Y) g- o
[ set label energy ] \- r' c: \2 A* p! Y6 E# @2 Y3 r
[ set label "" ]
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end
5 D, O5 [; g! M0 Fto reproduce
1 X$ m t2 M& `9 {( r; M ask turtles [- r/ ~0 L( g/ w+ ]' d8 h( [
if energy > 50 [
+ k# W% _6 m: y; ? set energy energy - 50
$ i! F* `# K% n2 g* K8 t: ] hatch 1 [ set energy 50 ]
! G( M" d% E# e" S B" Z4 D5 h% k ]( {& H$ j# {$ _ E: H7 n
]: W. F. l" A- q8 M% i
end
6 g, m$ f @- e# Tto check-death) K S- K v8 ^
ask turtles [
" s$ @6 Q( p4 C7 _; z1 Q+ O+ t if energy <= 0 [ die ]9 X- z8 Y9 J; ~) F) [+ ]' _
]
+ g1 Q" o! B" u, V/ @- oend' E! D9 X6 I7 r, O" O( m/ k
to regrow-grass. t* m2 e! t' [7 L, y u
ask patches [* _ V' R% v9 ?/ x4 A% q3 z9 G
if random 100 < 3 [ set pcolor green ]
& h3 n# R$ I+ Z; o ]. \2 [ f4 m# \$ n% |" o% t0 a, c: K
end5 Q+ p* |5 E O! \" S: F
to do-plots2 T9 a+ p. Y2 C4 [4 b7 A
set-current-plot "Totals"& L, G) r# Y8 G$ m# i
set-current-plot-pen "turtles"
) S3 y, e# ~1 D+ y1 C# ?) v plot count turtles/ I; E& x+ e e- S4 |) [
set-current-plot-pen "grass"5 X4 }/ u7 ^: Z- t, v
plot count patches with [pcolor = green]
3 o5 b. f3 _& e5 kend
# K$ w4 S: {1 H* A可是运行时提示no such plot: "Totals"
. K3 G, J/ P1 @# U* eerror while observer running SET-CURRENT-PLOT
% N5 `1 Q2 \) ~0 h called by procedure DO-PLOTS: F+ k1 ]- u7 t9 w
called by procedure SETUP& F: n8 L+ Z8 d/ J& v* D
called by 按钮 'setup'
: G2 l, Y+ r* Z6 z& V求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
