我编的程序如下turtles-own [energy]9 v5 i0 K+ d j% e3 e% Q) C7 H5 v
to setup( R1 d+ Y7 g$ J$ L3 X X: a9 F
clear-all
5 Z$ G0 g2 X; q6 x setup-patches
$ c9 ^1 |( h. s6 e/ a create-turtles 100, r! H4 k- s$ U. j
do-plots% x5 N9 ~ {9 J' r- }4 M
ask turtles [ setxy random-xcor random-ycor ]
2 z1 G0 l1 B' J- ^end, \& k |. W, L/ H3 V: Z
to go- L2 |7 X2 [- }+ X
move-turtles
$ ?5 a9 F: J* j2 ]! D eat-grass# n' c5 a0 }1 i2 U y. k( l
reproduce( ^' |% U; c# }2 y4 _' J& k
check-death4 i$ S) m; c7 ~+ ]
regrow-grass
; y$ O% _ }* b, D0 ]0 B" ] do-plots
6 l& T& p* ~6 l: ^% E F: J6 _8 wend: ^# t; U8 d- i- l) H
to move-turtles2 S) u% Q' ^& p' m) {
ask turtles [6 J) }, R5 F; t9 s* \
right random 360
6 B7 h5 V! e7 g' q forward 19 }' H2 r6 ]+ r0 S
set energy energy - 1
. Y( _ Q, j5 k$ l& T/ Q% s( ?! _ ]
5 p+ ?* }. [& fend
; }8 ]! f; t! [% fto setup-patches" C+ S& U* c( J. f* L
ask patches [ set pcolor green ]
3 x) C1 Q {0 E# Dend; o# V$ n" }+ J" e0 j' A% D# ^
to setup-turtles0 Z: d* ] a5 S8 m! ^( b' `- l. X, b
create-turtles 100
' i2 ^% X2 a- ?8 w ask turtles [ setxy random-xcor random-ycor ]
% ^ B( F9 G( X6 q$ Q) L# o6 H! Aend4 v$ p: H- M$ ?& N
to eat-grass
- {3 u/ s3 \$ L ask turtles [
6 w J5 c* C" I! F% e! x0 v if pcolor = green [+ I, ?; G- m. G& b3 K' H$ u
set pcolor black
3 V8 C2 C% e- Z0 F- K7 e/ g- r set energy (energy + 10)
- Y% T9 N. \ d* S& o' l# T ]
- w7 a* R& Z7 F ifelse show-energy?# `4 V* M( V. N7 L
[ set label energy ]
" Q7 o3 K4 t0 m! \) o# g' U' y [ set label "" ]. U4 h$ X" h7 P7 W: n9 |4 B
]
9 {7 L, A5 S, D" bend+ q: t+ k& d* C9 }# N8 A4 z
to reproduce
! b' S3 [. g) {( r' W: u) a" c ask turtles [0 f: G) L" n- P. L
if energy > 50 [; k. H7 [( v) X/ ^
set energy energy - 50
9 r1 ], ~, y* u# J hatch 1 [ set energy 50 ]$ x& a$ D5 N" Q) G
]/ q9 }# S& e4 T' a
]
) U' U. G+ r1 T6 w$ ^7 iend
1 {- v- G, D7 v7 H4 c- n5 n2 \; y+ vto check-death, |5 j' Z" h O$ Z( N
ask turtles [
% g1 V6 b: |9 @& d7 I1 y if energy <= 0 [ die ]: V# g0 _1 \6 F4 F
]
k' E' I4 A# t6 Eend7 y/ F) T5 t4 U! A. y' H% O; [$ Q" c( c2 O
to regrow-grass
* V+ h$ D6 `) Q ask patches [
" U/ x8 b$ C# K. h$ O' v if random 100 < 3 [ set pcolor green ]
/ j5 x0 v8 E* ^+ O" Y ], Y0 p+ ]( M2 h, C9 w+ o! S2 W
end
) ?" X6 F5 Z% Y5 Hto do-plots
A( i1 U. }& O5 n4 U9 C set-current-plot "Totals"
4 r7 j2 j; l! x% F set-current-plot-pen "turtles"( z8 t$ h/ U1 s f5 w
plot count turtles
. Q) |/ a L5 z9 c4 k. g set-current-plot-pen "grass"$ z: v5 g6 ?: a
plot count patches with [pcolor = green]
% K. f5 C" N& {6 `3 |5 }end
. ^: b) x' V! r7 f( F! G" ?可是运行时提示no such plot: "Totals"5 l& q6 _+ ~- D4 K! ~, ]; t
error while observer running SET-CURRENT-PLOT
o8 Q/ ]! [9 P+ c* n5 j- e called by procedure DO-PLOTS; V+ ^! Q% g! o7 L% e0 x' I
called by procedure SETUP7 ^# W* M6 \# ]. i; O
called by 按钮 'setup'# }4 d! I4 _* N7 n5 H1 y
求大神解答啊 |
[复制链接]
楼主
发表于 2013-5-29 00:25:38
