我编的程序如下turtles-own [energy]
0 ` w# `" @6 y) F& |1 |. ^& r+ uto setup
- r1 b; F2 N6 _7 u- I clear-all
) S0 @& U5 i, D3 x$ l8 i' x* p setup-patches
8 l" o: X7 X5 b8 v& h create-turtles 100
C3 G% k# H( G8 e0 |6 g' [- _ do-plots6 N5 a0 q- L$ z% ?- x. @! j. g+ ?
ask turtles [ setxy random-xcor random-ycor ]0 h0 y8 r3 Z1 E; M
end, R" ]3 d* }2 h4 ^ G
to go! g- N( y! N$ P2 n2 _2 u$ |+ n
move-turtles! E5 s) [, n5 A1 g, o- E3 N" b
eat-grass
% U6 a- ~ }0 g( } g: s! U6 k reproduce: G; z' F& @+ }# b; I5 k3 u
check-death9 D) k4 y8 }, ]9 x
regrow-grass
7 i! V0 G7 o# m6 ~, y do-plots% ~& \: z# L% J3 d& T
end
' C# | K7 e8 S: v! Wto move-turtles( w5 s4 b; }# f3 S( O; G u
ask turtles [
% e* H( L9 F4 d right random 360! {8 ~- V1 |7 W2 a- r- _# Z
forward 1
0 F/ Q. u; f, y" U. d7 G' C& m7 X4 _ set energy energy - 1
. _' ?4 s6 m; K) t6 a5 y$ s& l3 w ]( _ F, }5 C' l
end- I/ s) b0 m2 T& y8 |) t2 \
to setup-patches/ R5 y/ B$ t; ]
ask patches [ set pcolor green ]
- ^5 b9 f+ C4 k! E, x3 wend
4 N; e' R* _" \3 V) p5 Yto setup-turtles* |7 c6 h8 X2 ^7 _7 j+ U6 w
create-turtles 1000 L) H% i5 }/ o6 H6 G
ask turtles [ setxy random-xcor random-ycor ]4 ]7 i) a! g- z- g$ `
end _3 z/ Z$ Q( F7 V1 U, B& q
to eat-grass
) [) `. D. b7 x# f/ e s% {: C% U ask turtles [
1 r& |$ ]6 A, V2 y5 t if pcolor = green [' D) k- d; g4 z N
set pcolor black
; V2 O2 ]" |( B W set energy (energy + 10)
. m+ l& n0 h$ F% a' p ^7 M ]
3 }8 @/ t1 w5 z# D# Q0 L9 e, e ifelse show-energy?. x1 A& Y; E2 p8 R. W
[ set label energy ]
3 n! K2 r- B0 L( @2 L5 a [ set label "" ]% c$ q1 e. j G+ T) S
]
i. U, e3 l7 r, ?1 c9 I* k2 Qend6 [. g2 f+ A6 t, v
to reproduce
. V2 U# R' ^9 ?% K; T N( k ask turtles [+ n$ |9 u2 u3 z# ^' J$ u, U
if energy > 50 [
, F. v+ D' y7 W0 }& F6 f( ] set energy energy - 50% _# J H, A1 r, B- ^3 ?8 Y
hatch 1 [ set energy 50 ]) f7 Z$ Z+ d. v& A. H' B# W
]
! I9 y+ P; b. z/ y$ \; N ]% H3 N0 J; ]9 a# X
end
+ h: g: J5 L' N! kto check-death
/ ~) T7 i6 ^/ o( I+ H ask turtles [
1 L7 X" v# h% ?$ r if energy <= 0 [ die ]
! p% x* y* y2 u- A ]
9 |$ I. q) D+ W+ c# s. U4 wend
5 W$ }3 p: c4 y5 N; O( m. eto regrow-grass
6 W5 {0 D5 B# Q) V7 x ask patches [
, \% K, B& x' L. y if random 100 < 3 [ set pcolor green ]
^. j* B8 K& B# R4 B. D6 e ]& U9 ~6 _, B; k# o( H0 V2 X# d
end0 d( o# L4 e8 z* w% k2 ^1 a" N# Z
to do-plots
2 p4 i' C2 u+ g9 u1 ] set-current-plot "Totals"4 a4 U9 C& A/ I) ^; N* V1 j
set-current-plot-pen "turtles"6 s0 v; a/ ^6 y5 ~( ^
plot count turtles
: B* r7 U7 U0 p set-current-plot-pen "grass"1 C1 \% j/ m. E
plot count patches with [pcolor = green]
6 a" h, I2 x' F' Q+ H% V, G8 Gend
9 c u/ U2 Q4 ~% b% ^& ?3 Z B: \可是运行时提示no such plot: "Totals"
0 l) k( R' M% Berror while observer running SET-CURRENT-PLOT
3 A9 D# c& b3 w called by procedure DO-PLOTS5 y) ], w7 {* y. n q$ F
called by procedure SETUP. \+ _. I6 u5 r; X" u6 s' v
called by 按钮 'setup'& Y9 Z8 d8 k- f
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
