我编的程序如下turtles-own [energy]
. z& H/ g( r+ J; Gto setup
! R5 ~+ ~# d/ w, p clear-all: s/ L: X. c/ `+ P$ m
setup-patches
, a! N: ~# g- s0 c create-turtles 1004 ]; c( I; C& D6 `+ _6 W
do-plots
6 Z6 u2 p0 E+ Y# t. d1 c3 C; g ask turtles [ setxy random-xcor random-ycor ]( L1 c8 @' p$ Q
end) z) m/ D+ J# H+ g4 K- H8 p0 m3 w
to go
. w! I5 y& S' W3 T7 l move-turtles
0 \! b' t& g7 n* i/ {4 L eat-grass$ P/ Q1 V; Y* v* [$ F( y/ Y( X1 J
reproduce
+ u8 W' x8 k W) S* I6 f8 D check-death) Y5 R) P( t; W$ h. T
regrow-grass
0 K2 X1 \$ z& G; Q! l, U do-plots( N5 h( Z9 \! G( Q) M
end
' C0 Y; T! ]1 ]2 }to move-turtles2 z/ B4 {6 A& \& Y2 a
ask turtles [
1 Z: o! C, r N- k6 h6 Y right random 360
: J6 V, K4 {/ k) N" Z3 J' b' k forward 1
$ ]% X" P2 L" U+ A" [* z set energy energy - 1
U4 @6 H3 s: X" }6 U/ e' Q! p ]
0 Z+ D; \5 B! } ~- Aend" S2 ~; Z0 W/ w, B
to setup-patches& S2 L0 u0 O2 E2 o
ask patches [ set pcolor green ]1 T. t; o$ @4 D3 S, N7 S# e
end, f& H9 m6 g# O* z" S
to setup-turtles: Q+ H0 O V, a7 }+ R; \
create-turtles 100
! @: t* ?! u+ c8 d( g ask turtles [ setxy random-xcor random-ycor ]
# l% U) c( N8 P/ G. }$ U7 Jend8 B) G7 \) f6 ]/ |! a2 ~
to eat-grass$ \* O# d6 @0 Z
ask turtles [: n3 @$ u+ I0 E' ]2 M' V- R
if pcolor = green [
. m* N3 F4 ^& T set pcolor black, f& Q/ e( r& J, o+ y" K( l
set energy (energy + 10)# g7 x# J5 W9 o b/ g% J8 w
]5 y' X9 K; [9 V3 l9 f
ifelse show-energy?! o+ J( H6 F e/ t0 b' c8 Z/ s
[ set label energy ]2 B& s" d- t. I7 B$ H/ R( G" [5 p
[ set label "" ]
6 V' a/ T5 O2 i* ]: q7 f ]
1 B! {: P, k/ e* ~/ Q9 send
& n2 f5 e0 C! m% T7 Gto reproduce
& ?( u2 r- h/ ]8 u ask turtles [
# a% @( z6 I- R2 R* ?! o8 P, k) d if energy > 50 [8 T# R% h8 A; Z5 x; i4 B7 C( }: n# x
set energy energy - 50- @3 T" N, U7 n3 I* ~" B
hatch 1 [ set energy 50 ]
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5 h( B L8 {& h5 ^" k9 u ]
! Q" L+ Z B8 x9 |" s3 Jend
# @) s) u5 N- Y# T' l# Gto check-death
# E7 l0 m3 P% q5 ~, |$ ?. f/ C ask turtles [" v! \+ b! J% j
if energy <= 0 [ die ]
! s" Z. Z& Z8 `& w! r; n ], W5 f; T: X# h ~/ m) N; K
end
) a) J4 q0 A) ~9 }' ?, D9 ~to regrow-grass
0 h, a9 [+ {7 h4 P+ W! }8 s3 n D: I \ ask patches [
+ G1 F" r9 l$ }! S1 V- W if random 100 < 3 [ set pcolor green ]
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end
' S+ w3 @5 z$ ?$ Fto do-plots
' U4 n3 F6 L9 A, M, \ set-current-plot "Totals"
3 ^* D: m) U# v. ^ set-current-plot-pen "turtles"; F+ m1 \/ q6 T8 J! T
plot count turtles# a3 P' z1 N* U& C+ z# k* @$ n
set-current-plot-pen "grass"
- S5 J+ N% r3 {' j. E% T, i plot count patches with [pcolor = green]! S: r, M6 C6 c; u
end! ?- e# q6 n0 `# u, b
可是运行时提示no such plot: "Totals"
, J0 a- e, P1 E" \error while observer running SET-CURRENT-PLOT
1 f: b/ ]/ K2 [0 w called by procedure DO-PLOTS) T% c0 g' r) z7 _
called by procedure SETUP
2 ]/ p0 g* \- N7 u( o/ R1 `- I* j1 a called by 按钮 'setup'
; b2 n. {+ R: y求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
