我编的程序如下turtles-own [energy]
+ N8 I9 B0 j' X( L) dto setup- d! { S/ B; X( S6 e
clear-all
4 m' n T: {, ~: m ~. N setup-patches
2 ]# v0 O a: r* G5 q create-turtles 100- V) E! D4 m( R( c8 q0 C3 i7 R, I i4 p
do-plots& O' k; g* v* g
ask turtles [ setxy random-xcor random-ycor ]) ~/ ], t5 _6 _
end
8 w% ?1 ?6 ]2 i% @6 Zto go
) o$ ^; ~% R, D. B: p: X move-turtles, P* b5 X' Z0 }4 A7 Q! d
eat-grass# z& v' h4 j* H2 Z+ T% C
reproduce
( k1 e: p8 h& d+ \6 ]* M check-death- h X) A7 |! l" l
regrow-grass. \( R/ v8 w9 U6 F+ f0 x
do-plots4 U Q1 u8 C9 i/ ^6 f
end% D& f1 g$ r0 l, t5 v9 k5 |
to move-turtles2 d6 E Q$ }' V9 D, s: C& D( H
ask turtles [( g# S m8 y$ b/ z" i* C
right random 360
4 E- u# N1 j* v forward 1" B% h `/ M3 j. E, ]8 [6 f
set energy energy - 13 h3 ^# ]" w: V. ?% B- m/ N% `, `
]
7 O3 ~7 Z/ `) C+ `' ?1 Send
! t9 Q$ z8 P) O$ z0 hto setup-patches
! {7 h& f* T# N; M3 { ask patches [ set pcolor green ]' D( @: V1 |. }: W& X
end
8 b8 c9 T, C- c; r+ ato setup-turtles5 }0 A* q, F: k7 O
create-turtles 1004 c. y9 l% u2 S6 X" i4 |- m! z
ask turtles [ setxy random-xcor random-ycor ]
2 l3 e, M: W, iend
: H: G4 ~- |3 bto eat-grass( V, N7 j. E! c9 o7 d% g
ask turtles [
8 ~ ?% X3 g9 l5 z7 N if pcolor = green [
4 C) j" a/ _; }. d0 g set pcolor black0 F; D8 }* l# u" s3 } u& ~
set energy (energy + 10)9 j! h, }$ B* f- i, }
]
/ P" L3 s/ W! \5 S4 D! M: m ifelse show-energy?: F( L# o N+ c* w9 K0 q4 k
[ set label energy ]
5 H8 R& }6 @. M" j4 b [ set label "" ]
) e7 p$ J; b% V K ]
+ l. ?5 y8 O% oend4 |( l6 j8 E/ I
to reproduce, M p) H9 U& v5 q3 P1 g8 f
ask turtles [
4 x' z- a8 ^( t* r* _ if energy > 50 [( k. T% b/ g- t6 X4 i6 X: n
set energy energy - 50
. D" L% c" L6 ^4 a hatch 1 [ set energy 50 ]
' X( e* I& n# [% W* w3 e1 V ]6 o. Q1 b/ |5 G" c9 d1 N
]2 M" ~% J7 {# m! l
end2 _/ L) u% b% Q9 p
to check-death
4 \; s: i( M s# q+ P5 F& E ask turtles [* W# m. |8 x9 n9 F0 u+ ~
if energy <= 0 [ die ]- R! R( \+ N7 C3 \4 g7 J8 G
]
7 H! d( Q0 H, ?" ]* P% c! L; cend' [$ [* h8 U& }4 T! Y# o! x
to regrow-grass
1 N5 ^, ?4 L3 V$ e5 {9 h3 ]- N/ _& q0 } ask patches [+ q* f4 B3 t: |8 y, s1 E! u. e4 P
if random 100 < 3 [ set pcolor green ]8 n, \9 c$ W, W) S) O
]
. v9 ~* P5 ~+ F! @% E. {) ]3 yend0 R6 U% N q6 @
to do-plots
) { H, o. I' {. ?& S set-current-plot "Totals"
' k8 @& a7 ` a3 Q; k$ H- F set-current-plot-pen "turtles"9 V' i8 G$ K& B& P$ r3 x0 X
plot count turtles
/ t2 M# G, X4 x5 _7 \7 ~ set-current-plot-pen "grass"
2 F0 \8 V1 p6 S, @9 E' J plot count patches with [pcolor = green]/ }% D! K0 E" k3 B
end# N3 ~ }: ?. h$ W
可是运行时提示no such plot: "Totals"' p0 G" ]5 I) p9 Z
error while observer running SET-CURRENT-PLOT
( X- C# |3 k- B4 K1 Y3 Q called by procedure DO-PLOTS
7 Y2 `0 Y& p" l& a* K' J called by procedure SETUP
2 L$ q0 n/ C1 {7 p8 l called by 按钮 'setup'4 e; k6 g- ?, G1 X7 W
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
