我编的程序如下turtles-own [energy]) y: O2 P- d; ^' u
to setup6 U* Q' M8 E% N
clear-all) W" k- I) F! O3 k" Y
setup-patches
2 d4 u2 m( l6 X, ` create-turtles 100
/ g, W) s) `5 P' H do-plots1 ^6 }1 L) v5 K h9 B
ask turtles [ setxy random-xcor random-ycor ]
3 ], o# {+ C' yend" {0 V2 s. l: Z: p
to go
: w5 f+ U i P2 j" ~ move-turtles
% X- G# D) s2 i9 L eat-grass
+ ?6 f/ y: ^( C- O0 X0 S reproduce B& t2 U( }) _. f( \8 F5 R
check-death
. l% c p" X2 O regrow-grass
& D' a$ ?) Q7 [) N' L- Z1 p* y do-plots
3 r+ o/ ]8 C/ i7 Q% lend
# H6 u3 K& k& h1 z' K$ @; jto move-turtles
. K+ b- k' [4 Z5 Q% m' i! x' A# } ask turtles [
% V) I3 C1 S# j5 O& d2 H right random 360" ?1 W& J1 N( d# h- H4 _. n$ r. N
forward 1
3 | j3 s% D3 C$ Z2 n4 y* r% E set energy energy - 1' t# P" s) R& g y9 T$ |
]# t4 `+ Z9 l2 [2 \: k9 c X) S3 z
end
: l4 {5 h* O4 L* T# e2 Eto setup-patches
7 g3 T/ ?& `( E8 f+ J2 S ask patches [ set pcolor green ]5 W" X5 y; q; U+ {* \
end
. k0 G9 F; Y& Y7 c& m6 ?2 ?to setup-turtles9 J5 w$ y, _4 u q4 K9 I2 W$ h
create-turtles 100( I. {; B. |' X1 J/ y3 w" @
ask turtles [ setxy random-xcor random-ycor ]& r2 a) u5 z% ^' } a5 }6 X
end) ]7 a; W, g1 X
to eat-grass
: j6 v8 U, V5 @. R) X2 h ask turtles [4 I" ?# l) P3 R' P, A9 z
if pcolor = green [7 w1 t5 G' b9 L4 B
set pcolor black
3 g7 @& T5 W# |" r$ @6 L) i set energy (energy + 10)
, q6 V2 C6 D; \: p9 g! ?8 X* F ]
/ z: @) E5 \7 j" e! F ifelse show-energy?
+ K% {' V( Z+ A' j! k" o [ set label energy ]4 K" Q: I3 R* ]# A
[ set label "" ]
) h$ ^) F% b4 n ]+ @5 T, d, E' d, l5 s7 H
end& ?) M J+ Z5 T2 H" [
to reproduce
: d& o; C3 `% k ask turtles [. D: R. u/ M, |' t) k% L3 X
if energy > 50 [1 C* ^* k. {- u6 Q
set energy energy - 50
4 e2 i' U" R% S; ]/ U hatch 1 [ set energy 50 ] T1 d+ f" v1 y+ V
]
) {# {# A4 t3 x, q ]
! b0 g3 u6 U g1 ^. A/ [end
4 D5 e% X' |1 I' `2 y4 j8 X# {4 n7 pto check-death
6 Y$ U7 O s) O3 @. U5 |! g ask turtles [$ o: c0 |* \: i0 l# R- k
if energy <= 0 [ die ]$ |+ a/ n. r5 i% f7 r
]
6 P! C, R# @ u6 F$ F/ aend
, t. d% P: k/ ^; Eto regrow-grass
2 ?. f) E8 c! E9 G w) O) Z ask patches [
: k" h8 q/ z/ u" b/ S if random 100 < 3 [ set pcolor green ]! X3 h* e% E7 r" r# C
]2 { O) {" x$ V! O. `
end$ x* @5 C" h! Z) ^. j8 G. }
to do-plots
! K9 J8 F' _) m, `1 V) @$ J5 D set-current-plot "Totals"5 _# t+ Y9 F, u" T- [
set-current-plot-pen "turtles"
- T* M. w2 ~! S6 ?, _ plot count turtles" X0 {" j6 z! e& ]3 {% r v4 E, I
set-current-plot-pen "grass"
6 C. }9 H, K. X4 e1 I3 h$ \* A, b plot count patches with [pcolor = green]7 {1 j1 Z6 P* t, i: c) |
end% \0 N$ }0 E* v) G5 Y+ M4 }- b. C
可是运行时提示no such plot: "Totals". }; P. h% R" B# y, E, _. h
error while observer running SET-CURRENT-PLOT
! ]+ W' u! G; ~5 m2 J0 s# M called by procedure DO-PLOTS/ q! n# `$ Y$ c. ]6 Y1 S
called by procedure SETUP
$ P3 n& m' Z D) O called by 按钮 'setup'1 Z2 \( X: L: u% D7 R7 }- e
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
