我编的程序如下turtles-own [energy]" a, z) c8 u9 i' U! P# D
to setup/ f" G+ q) T' l) D$ c7 a6 p+ j) X
clear-all. I* H2 V* ?( ~! b9 ]0 o8 y2 a
setup-patches2 z# v- o z2 @9 q8 Q5 f
create-turtles 100- p, ? z. p P6 b5 j! L' X/ e) X/ W
do-plots
/ U- V) x$ z; A+ Z0 ?' J ask turtles [ setxy random-xcor random-ycor ]
2 m8 d# ?4 x: @) {end
% K ?" O, w1 u5 a4 Fto go1 ^' Y6 H$ v* o, c
move-turtles' |9 k' d1 N6 y) e6 |
eat-grass6 G! s6 h2 | @; L- t, i
reproduce# s$ p, P9 K3 c2 M1 Z0 o. l
check-death
y9 N( A4 y } regrow-grass1 h0 {: [% f/ l% s
do-plots# a4 v6 Z b* g( h, G2 u3 ~
end$ j; m" s! M, G* M: q: b5 k
to move-turtles2 [2 V% F, W9 w) |9 F
ask turtles [& W0 D3 [1 _5 ^0 Y, V# m
right random 3600 }: n, N; B3 ^: w* [
forward 19 A @" Y! W! } @ Q9 e
set energy energy - 1
& d m: b6 A: e6 H! K, v1 M ]! w& E/ R A( W& X8 p% H$ P
end
3 G: I( T9 K# Q! G" kto setup-patches9 r& x) _' g: D! I
ask patches [ set pcolor green ]# C5 d4 Y g% J' d
end* \, W N9 f4 U+ u' u7 H( A
to setup-turtles; M; D9 J' K# p
create-turtles 100
4 u- p$ i; Y4 C ask turtles [ setxy random-xcor random-ycor ]
2 \3 d$ Q$ B+ N/ {! h5 k! nend0 [4 X0 {1 I3 V1 \: d2 ^- \0 Y
to eat-grass
$ [- b$ `8 ], H8 l ask turtles [, L# A2 ?* p% y) c
if pcolor = green [8 J- ]! Q' w ]( L6 M/ Y
set pcolor black/ F8 s1 J7 @# z; J
set energy (energy + 10)3 w/ H2 ?! p0 h' I
]
|0 ^. k5 z$ b. a W, q* c: w! \ ifelse show-energy?
' W" ~/ w. I! Y, p [ set label energy ]- ?9 L8 A) l7 {4 \
[ set label "" ]
7 o& C. L6 P% h4 I7 }: P8 g ]# n* t. _* v1 [! k
end
! `5 Y( ?- k- q/ G2 Rto reproduce
/ y5 J5 i Z. Y; |# b. d ask turtles [
4 t6 I+ I% F a. t if energy > 50 [
8 e r/ Z) s: Q$ O$ Z" h set energy energy - 50
1 O) C* C* v- g& s; ? r' h k2 S+ E hatch 1 [ set energy 50 ]2 q5 R+ G, n; `% u2 H. k6 E$ \* b
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]
. x: i a; X( ^( Cend
9 ]6 B4 \; p7 C7 l! ?$ [to check-death
- f7 U5 b6 P1 {1 q3 e4 r3 N ask turtles [
% L9 H6 @& H& J+ ? I if energy <= 0 [ die ]
( O% d6 Q1 P; p2 J, r ], L. }0 m; f$ k2 T6 ? v
end7 X8 u' K1 i& S% V' ^! N# i
to regrow-grass+ o8 d* ^# [ I5 G9 }* b- S
ask patches [2 U _8 U/ P0 @, U0 O
if random 100 < 3 [ set pcolor green ]7 c; _& u4 w& A- `
]/ v8 @9 j( F+ D( N B0 @
end" ?6 u4 E1 j# I" _ n- f$ O
to do-plots2 _* P9 M1 g, H2 d$ n/ }+ E
set-current-plot "Totals"! S1 ?; P# g( d9 |: w! ]8 ?/ y
set-current-plot-pen "turtles"
# W7 m2 @5 {7 h6 }- Y plot count turtles" H( i" U4 r1 `6 j6 g+ j
set-current-plot-pen "grass"; e& r6 k4 _6 G3 ]4 c4 J5 X1 h8 s
plot count patches with [pcolor = green]
. b" \" u8 a, u. J* Uend
, }6 f& U0 ~% T( `# q1 |- k. V可是运行时提示no such plot: "Totals"5 O. Y7 {) J/ n$ M
error while observer running SET-CURRENT-PLOT
* ~) Z6 j- m7 G' F called by procedure DO-PLOTS; V$ i W# z) `
called by procedure SETUP
* X2 \+ ]+ W# F2 c% q called by 按钮 'setup'4 @( N( T3 z1 G
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
