我编的程序如下turtles-own [energy]* n$ P) z, S! z9 {. O# V0 r, f& i
to setup
% R" m1 k+ U3 b* ?2 x" a# X4 s clear-all$ U S9 b, m# R0 [1 i! L& G
setup-patches/ c4 v3 \5 n8 x4 _
create-turtles 100
& N- \0 n6 P" C% C# M' g9 ] do-plots: ]" g# l, h6 p9 F0 R+ ?( _" ~6 f
ask turtles [ setxy random-xcor random-ycor ], J7 l4 ?6 i, W# I
end$ E2 I% f6 I" j
to go
9 d) Q$ {) q: c. W, E, r) n* g move-turtles9 f2 W# p8 }- j7 d" I: B) ^
eat-grass6 y( a- W4 I) x2 m6 z) d7 i Z
reproduce
8 [7 B1 ^1 O# s6 A" \0 j+ R1 H, X6 J check-death4 I/ l% ^6 W# r' E }6 g$ U7 z# ?
regrow-grass# _8 M) O* H/ d \ Z9 ~
do-plots# H7 b' u+ _4 O: c
end7 f8 n4 @$ C5 X2 L& u3 I
to move-turtles k0 `" F( j: @" }6 l! T( |
ask turtles [
# b& K: L$ G8 k* O8 f, o! S right random 360
/ K1 d3 G8 S* C6 q; K3 u1 G forward 1$ w. Y2 j* n9 t# G0 T3 d' J& F
set energy energy - 1
+ P0 Y q5 [- r9 r5 i# o: W ]
8 Z) K3 ?' G2 qend% Y; ~5 _0 C5 W, s! o# ?5 g- s
to setup-patches! B: i8 k5 `, q7 r
ask patches [ set pcolor green ], n7 l- D( [) A) ^% J7 J
end, ^. W4 F8 \& ^+ D) y
to setup-turtles
+ l$ q0 z$ P$ m, L; ^! j3 [ create-turtles 100
. \, f# x3 |" V. p ask turtles [ setxy random-xcor random-ycor ]% C4 m! d. I( {
end
, m( A5 ?3 a4 ]to eat-grass
& x+ r1 X- j f- f+ x! S ask turtles [, \) V' Y' e: f& ]
if pcolor = green [
" a8 D1 ^! e) |$ H1 N" s( X1 @ set pcolor black/ {7 Y3 j# L0 m# i
set energy (energy + 10)
/ \4 P% |( t* }* U/ ^! f0 a7 x ]" b. w" w8 L; |4 F" a
ifelse show-energy?
$ o1 g( [/ r0 B2 P( ^& e [ set label energy ]6 o4 b6 z! o/ W1 f, T5 H- P( Y
[ set label "" ]/ {% Y/ c: w$ h4 T0 r
]
) ^1 @0 P2 i- C$ a. X7 U) f) pend Q* r& E- r9 ]# |3 C
to reproduce
, y! N5 r7 b" ~: Q" p ask turtles [, T+ f, j. S% z/ W% n F! A
if energy > 50 [
. E% @& n7 h5 O% Q/ E set energy energy - 50( l! c# \3 G* X
hatch 1 [ set energy 50 ]
1 @- @# F4 Z+ k3 G: j ]% ^8 C! l; Y4 O1 ?: ~) T; F
]- g$ D) v; k1 N
end: M/ z3 e- C/ u2 K5 q& c
to check-death& H" t& N: p+ ~) i6 b; ], w! v
ask turtles [
6 e7 }6 T+ @* @" x/ Q if energy <= 0 [ die ]+ Y' c" I+ P9 f' S" n4 b
]! `$ m( Z& w/ [; G& U2 r9 H. ?1 J
end) k9 d6 A6 h: {7 L$ j
to regrow-grass
: {3 i. w) [3 @) t/ y7 r ask patches [
: [+ s, c7 Q2 A% M; h5 H/ ?% K* [ if random 100 < 3 [ set pcolor green ]7 V2 H; w B, w! M/ @
]0 }* y0 g- P) b, d' I
end* W+ j6 \) n3 c4 |" p& F
to do-plots5 r. C( }& W$ {# \! Z
set-current-plot "Totals"
8 x) m! C3 ?$ a# P set-current-plot-pen "turtles"9 Z) p% |8 u) H
plot count turtles
& y, H+ Z. w) V; t set-current-plot-pen "grass"; l* z- [" h- M
plot count patches with [pcolor = green]
& [ \% V" a: T+ R+ O' eend
3 H' u0 T2 R& z) F# e可是运行时提示no such plot: "Totals"* L' h2 a; @! v* a! ]( F
error while observer running SET-CURRENT-PLOT/ K8 z# K% v6 l( q
called by procedure DO-PLOTS6 [1 L: R7 k3 y9 ]9 v& x
called by procedure SETUP3 R1 j/ T0 o6 J0 I* w* p7 _6 ]
called by 按钮 'setup'
" r: A. e# f" |4 M' }求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
