我编的程序如下turtles-own [energy]6 U+ p8 E8 ~ u4 S
to setup
! @+ l3 S) W; { clear-all1 K- s. c8 m' G. J: C, u- U# Q
setup-patches( X. U, q) k C, l+ O
create-turtles 100
2 A: w! I& m$ h2 h i. f do-plots) m3 k- o/ q, t# v1 O% y2 u
ask turtles [ setxy random-xcor random-ycor ]5 w9 v9 @" I3 J# C
end% P( g0 o9 ` i
to go
' P( p1 S5 d# H* [; r9 O% X move-turtles
1 y2 z; R& L, V/ ~7 E a eat-grass) o+ c5 G8 k4 W( n& d1 C3 w
reproduce
E( X5 ]3 ?- d check-death6 h' p4 P( W/ q9 K3 y) L) O
regrow-grass
( P; W% _% n2 G# F" W" h2 T+ F do-plots% G% e' W1 v. j/ n# _& ]
end
; G( T( w M- G9 B) |to move-turtles
# t* Z6 k8 H3 T. o- g8 ` ask turtles [
- L! m! E5 e$ j+ T- T right random 360
1 b8 Z- u: k0 T& }7 r- U2 _ forward 1& q! g. J a& P+ R# f% H
set energy energy - 1
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end
/ N4 n, I+ Y9 ?3 q; a' Z+ X: \to setup-patches
! [: F. O8 T6 Z w9 j ask patches [ set pcolor green ]5 i$ ^1 S# p& O6 @& [6 r
end
; \0 y9 z% r8 O- J6 d3 `7 jto setup-turtles; I7 M; ~3 ~/ h4 G: o- L6 y
create-turtles 100
2 M' T* `# d% q4 ?1 j) y ask turtles [ setxy random-xcor random-ycor ]: U" u# w. ^0 V
end
/ r! } @$ `8 q) J) V# Ato eat-grass2 T9 _% _" |! i/ `; H5 Z
ask turtles [2 Q9 d8 Q, X* ^' a& p% l% A2 a, V
if pcolor = green [* [! ?1 s& I+ |$ c I' b
set pcolor black+ ] f) h4 X# [8 f: C6 i3 j0 R! y
set energy (energy + 10)
0 K- {0 b( \0 Z- B( e7 k ]4 X2 s% D$ Y# d
ifelse show-energy?
7 e5 Q- ]1 q3 f6 e [ set label energy ]
/ w! ? m+ {1 `" U+ `, g4 }# F [ set label "" ]* w* z A) D" R5 @3 B
]
3 _. y7 [% G' T/ zend
* a# O& h! y2 e! a- Z$ fto reproduce
& w# i$ t/ p* d4 ? t1 R ask turtles [" P8 |# X; T; H- Z
if energy > 50 [
" }6 ?; _% P) f; H9 F& P9 p set energy energy - 50
! T! M% e2 g9 [. _, x$ x# M hatch 1 [ set energy 50 ]" s$ a9 X% t) K5 ?" l4 Z9 { g
]: q4 H5 W8 [4 V9 p2 Y7 {: E: a! V
]5 |) |. F' s9 X. X5 F
end
# a0 r% T" Q) Y/ Z/ q, \to check-death
' q; Z/ ]8 m O: }" F ask turtles [: q3 y$ d" c1 U3 L8 P
if energy <= 0 [ die ]5 m- Q" K+ D; d$ l1 e
]' O9 W ] `! w k7 O" ?/ T9 ?% u/ k: W3 P
end) B+ U D) T8 {" L* C% {" ^6 N; ^
to regrow-grass
9 S+ i$ |6 d! ]4 c ask patches [" h2 W1 ~+ ~& l3 c2 p
if random 100 < 3 [ set pcolor green ]
; [% e+ D2 q: d ]9 e: }/ Z, t1 _" @* P4 I
end+ }% n; T5 ^1 U
to do-plots$ t M/ m0 G+ p$ T/ `' @/ u
set-current-plot "Totals"
. j& X O" e' J7 H; J set-current-plot-pen "turtles"
9 G- e1 W1 r4 d. n5 \3 P+ x+ [ plot count turtles8 Z2 N+ t6 _) ]# o
set-current-plot-pen "grass"5 v4 l& c5 t3 x0 Q, _+ n
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"& ^- o$ U; j7 n p4 [7 `3 l
error while observer running SET-CURRENT-PLOT' s) e' |; z, K6 |2 ~4 r2 j
called by procedure DO-PLOTS
! V6 R1 ~% d" l( p6 R: L0 n called by procedure SETUP2 T' n. @$ B, ^; s5 J
called by 按钮 'setup'
# c& T/ \* s: z. P% i @5 g# F求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
