我编的程序如下turtles-own [energy]! m" m5 Y: M1 ]% ^5 l" m& g
to setup
8 I# e4 C5 a4 O+ H1 `5 b! F% X4 \ clear-all, d8 ]3 z9 D6 ]3 N$ r$ c
setup-patches
# F, y4 h1 s! u create-turtles 1007 k! |0 g- g$ a
do-plots7 a. b F9 c1 K3 s3 s3 x# n& J4 i
ask turtles [ setxy random-xcor random-ycor ]$ Y$ E3 U1 f! f6 |$ \2 I
end
: i# g5 c1 a5 K7 A; S% t$ kto go
9 R3 r! J/ w4 d3 \, _# b$ Y7 K move-turtles7 P9 o& z. ^$ U& Q
eat-grass7 k& b) T+ E1 K4 Y
reproduce
3 m' g6 H+ e9 e ]/ @# t* l0 t check-death
+ z' l1 t8 |0 n* @2 t regrow-grass
! y9 o4 `0 D, m; u1 G do-plots
, P; G4 R' k$ c5 D$ a# n# E( I' A6 aend5 n+ j1 Q- r5 I& r/ k
to move-turtles
/ D* F1 X0 \; J; L' N ask turtles [
4 G/ Y8 F q3 X* o w right random 360
% P& w; m; \7 F+ q/ y forward 1" \* |* e! r- r# V- q, n
set energy energy - 1
! J N% y2 @# }1 A" s' R3 x ], E/ U0 p; r% T! Q' o
end) L9 X3 s* s ? a4 Y* r& m
to setup-patches
/ y( X, _& q5 }$ L v* C' C% ~ ask patches [ set pcolor green ]
' p. t8 i1 r2 Y+ L; H- d5 Kend' U1 @. q+ {/ k( p8 p! S% B8 X5 ^
to setup-turtles& `* u% J- P% o
create-turtles 100
* V, g2 B# i7 h' y# B& a ask turtles [ setxy random-xcor random-ycor ]
& W/ c# |/ l8 p; @* }* W" A2 {* tend
9 k# m0 J9 W8 o* H/ @to eat-grass/ N! A2 f7 e& K3 i1 h
ask turtles [1 P4 y4 Z( q$ R) d
if pcolor = green [& i, w1 [" H- E0 v9 ^5 ^1 x1 l
set pcolor black
7 u/ l: x* O( {8 \ set energy (energy + 10)/ ^# |) X: I |' f# A( a7 L
]
3 ]4 Q" U# M& v+ a) b, f' U8 ] ifelse show-energy?
* z" P I8 t/ t6 i- S- @" n+ G [ set label energy ]
+ |9 b6 ^% J0 @5 N [ set label "" ]( m9 }/ y; V1 ^3 B3 v5 m7 n
]% ^# c6 W; ^/ O( f
end
- P$ g& \( G. P! k2 ~- B& c9 \to reproduce
/ W& r6 [4 s* H- }) D) ? ask turtles [2 P! t+ [; P2 V4 ^# u# T8 b; k8 B; S
if energy > 50 [2 K' y, d7 g8 s$ n0 {
set energy energy - 50
, n5 l2 B# ]; C, l Q, O& O hatch 1 [ set energy 50 ]
: ?4 n; a5 s7 P7 C. g* A+ a: w# l$ `+ ? ]6 } \9 i# w5 [8 d
]2 V* e+ l, |1 a' b- G, I
end. l7 S' ^) _( _; U4 l6 j
to check-death
) y+ m0 X; J4 [! o( }4 q, D e! Z ask turtles [
0 l$ h8 [" W/ S& n% Y if energy <= 0 [ die ]
1 G, Y; W& A: d ], m$ C8 J( K/ G: ^) g9 Z( k7 O$ f
end
2 ~, T4 e6 C& m( i; x: |& cto regrow-grass
5 ]; F" A( J5 H. W0 l6 _9 C8 U- u7 { ask patches [
$ |0 ]1 \9 S, F6 ~/ [5 s if random 100 < 3 [ set pcolor green ]
\- m" I: w2 Q) n) T e ]
! y4 ^5 c/ O% X8 o4 _& Kend
: N! P3 }' Y5 qto do-plots
) H( Z. U1 `+ C# A" _* Q set-current-plot "Totals"
1 n' k0 ]- d% @& Q* n" R! Q+ ^: r set-current-plot-pen "turtles"
/ s) D& t8 t- y$ J! m plot count turtles$ D& |; }4 r% A
set-current-plot-pen "grass"
) \, k* J1 r5 Y1 w* z plot count patches with [pcolor = green]
( |% L% h/ b9 t( B$ B8 send+ ?% g4 X$ w( u
可是运行时提示no such plot: "Totals"
9 E6 i: L; l$ j6 s3 berror while observer running SET-CURRENT-PLOT
z* {/ n: T6 l/ |( m called by procedure DO-PLOTS
! i. W$ g q. ]1 ^ called by procedure SETUP
: E+ d7 z1 b7 @) ^9 E' N called by 按钮 'setup'! V' v" {! C6 A$ M
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
