我编的程序如下turtles-own [energy] }4 F' R! x' R7 F& S0 a, H
to setup
* y6 n" Y& ], r+ `. z clear-all
+ U0 B; S- {' w! h; } N; q: j setup-patches+ n# I' g0 j$ {1 z5 j2 O- F9 k7 Z! {
create-turtles 100
/ Q! K/ X6 U5 H do-plots/ l0 o( ?3 n# j
ask turtles [ setxy random-xcor random-ycor ]3 V' f/ h b9 M6 O
end8 S0 I# v+ Q# T+ O
to go, m/ h! H5 A: d# J5 r+ }
move-turtles
+ |1 B# l5 R, L5 G( [! v& _; u eat-grass
0 n4 f8 m# p. e reproduce
2 B( n5 I) ~3 A9 Y: N check-death7 b. K9 ]" K4 O( C1 K; K
regrow-grass- B: `, b6 \7 j. V
do-plots7 r* K% e8 A# o5 ?
end% |, u$ ^* C' A/ U
to move-turtles
2 H8 b) h9 f4 ?. _# Q1 ?+ Y2 V ask turtles [8 O+ ^. J0 t9 z6 j
right random 3605 b0 x9 t! F) ?
forward 1
9 y7 B7 k$ a8 L5 z set energy energy - 1
/ X7 G$ i4 z. O m1 e9 L ]& N- w! \7 l# y% }
end
: q5 [. \; K" z: Tto setup-patches
9 s+ D) s7 _# [$ y ask patches [ set pcolor green ]
5 w; `; C4 r/ {' \, }/ ]' dend
, L" F/ R+ \) j7 ^. fto setup-turtles
a' E* Y. l0 Z6 H create-turtles 100 c9 a! E. w; O3 d/ z: N; t! c& G# Q
ask turtles [ setxy random-xcor random-ycor ]) b% a, R6 v2 E
end
( s. p$ `" r1 }to eat-grass
* H0 l4 Q* e% K7 r9 ~2 e7 Y ask turtles [* o; k* E3 Q- o. c1 |
if pcolor = green [1 g" L) }* x6 b8 z$ O) T
set pcolor black: n9 K5 I( T6 K5 y" o M1 J
set energy (energy + 10)) A; `7 w5 ?% [6 ^
]1 {1 ]$ S7 t ]- P5 j# N) h! b: J
ifelse show-energy? @) d& d! e" y# O# c
[ set label energy ]5 s# x6 J9 x0 c* n! l+ Q, `1 R
[ set label "" ]; T$ R1 w, n1 V# b1 I, }; O. b
]
/ j9 |+ J: Y1 b$ R5 {, Z/ Jend% L! ?8 V: K# }9 r8 Q
to reproduce+ l4 t. W* O$ q
ask turtles [0 V: b) A8 w! u
if energy > 50 [8 C* r! Y$ L: u$ p1 p+ K, G; A
set energy energy - 50$ r6 B! }! `0 E1 v' ^; U a: F
hatch 1 [ set energy 50 ]/ e: p8 r' A) j
]9 m( ?3 N( O" E" N# v9 e& d! X
]7 |2 [! U1 e3 a9 n& z7 }; T
end
( e/ i3 [5 ?+ h( J6 nto check-death
/ h$ T# R1 K( i ask turtles [/ H1 M1 y, B" v- H' N
if energy <= 0 [ die ]: k5 r" b" Y7 F A2 n# g
]4 d6 i8 Z% l; U! Q' ^
end
a' {- e0 V0 N4 U) q" |# Yto regrow-grass6 c9 C" y7 T0 h& c2 P6 H) ^
ask patches [
W. H. x! w- y1 {2 z' i, ^; p( x if random 100 < 3 [ set pcolor green ]
1 r5 O, }2 b& N ]8 \: R* I1 v4 P4 J& @2 }- J
end5 M/ {3 \+ t X2 b% Q) e0 g
to do-plots
. _" Y. O) s6 f. [9 L1 u5 Q set-current-plot "Totals"
7 Z+ K, }0 c4 k2 p; w F1 K7 \. g set-current-plot-pen "turtles"
7 g$ q& [" ~! Y. S, ~" h( d# ] plot count turtles
; r/ p* j4 W4 i set-current-plot-pen "grass"7 m6 s+ x: W& l0 i8 h' P5 t
plot count patches with [pcolor = green]
/ k2 I% O; U2 E8 _# Bend
/ S2 S- N. a& o) L* C可是运行时提示no such plot: "Totals"
" |7 s* X" U' G& Perror while observer running SET-CURRENT-PLOT2 i8 R1 y# @) H" Y0 Z4 ?8 w
called by procedure DO-PLOTS) R' Z7 r! ~. ?# [" F7 @+ Q$ C
called by procedure SETUP
" [, r7 l6 L4 w0 M3 B called by 按钮 'setup'2 m! ?3 Y" i0 E( l# A
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
