我编的程序如下turtles-own [energy]! t7 P( f3 L0 I# N; j$ P% J
to setup
' }( i% @' y' |: K8 ^4 s6 W; A clear-all
. _2 R+ |3 G* D% a( j0 T8 q1 W setup-patches) i& N) [' A3 S8 j5 e
create-turtles 100( V! T& Z$ m) h6 F
do-plots. k) U6 {' [1 j, ^3 s; a
ask turtles [ setxy random-xcor random-ycor ]5 \+ O1 |% m) v7 L+ x. T+ e/ ?6 Y
end
M7 O! i( V3 k- _5 k% yto go
" X2 ^' P7 h" p! {$ v' } move-turtles$ T# `" C* W. k. X' ~$ }6 E" e( n x. T
eat-grass
- a6 \, f [ \. J5 E3 X7 a, [' r reproduce
; U, b8 f5 X; [6 _5 z2 L6 R check-death
8 o d" S" |7 d; C% r regrow-grass
4 M, N$ e5 |- g z& `1 q) B do-plots
8 Z* F' d8 ]& t- q. I7 jend
6 _7 ?3 C1 c# Bto move-turtles2 P' j) H# j* y5 r1 f
ask turtles [& w# g l3 Q- i9 ]6 Y
right random 360& M! T/ l( W: ]2 y/ t
forward 1& @/ t+ n; B& U& c
set energy energy - 1
$ ]$ O6 t* l, C; ~ ], r4 O1 ^! Q* T6 z( R K- t# ]
end
% C4 M" _: i' M9 I) k0 }9 o4 i# ito setup-patches! {% G) v# K! D8 u8 |
ask patches [ set pcolor green ]- L- g, c0 q' d/ B* t( k) v0 @! i
end
- O) S0 L" @1 @* Bto setup-turtles8 J, A: L, \* j* J+ o/ w4 k
create-turtles 100
6 n$ T6 K- i' q5 [: t ask turtles [ setxy random-xcor random-ycor ]( c" G3 g/ X) h2 q
end) t/ m( v2 l, r$ O
to eat-grass& L6 y( u$ I; l2 W
ask turtles [" V" d5 A9 m. s1 Q
if pcolor = green [, `. S& x$ Y" Y# r
set pcolor black
* j4 l- F/ Z( w$ `# j( B set energy (energy + 10)4 u+ {$ N- |0 M8 Q# m4 X; _
]
0 {! o6 |9 y' h+ G: p" L1 L ifelse show-energy?8 U( M$ ]# ]3 E% a
[ set label energy ]4 h( y f3 {! a+ ]. u/ [' {
[ set label "" ] h6 i8 ?2 c3 R
]( v- D. L$ m4 e- _+ {
end
0 X7 a( ^: y9 h5 l3 D6 Yto reproduce3 }" ` }0 N: H) b/ \3 d
ask turtles [% A$ A! o6 w# O$ H7 H9 _5 I
if energy > 50 [
7 q8 A* i9 Y! S; e. N2 J# N set energy energy - 50) z0 l+ z; l# @% P4 l8 X( F
hatch 1 [ set energy 50 ]1 L1 u3 e% ^% L) ]$ p- t
]: E' {6 {. C% G/ v% }3 f" E5 }( P
]6 }& G* y2 s$ l- ?2 Z5 H
end
8 n2 z5 Y3 n# c2 Tto check-death
; `9 @$ F E7 ]4 |! G ask turtles [
* o+ B( k9 T& p: N0 g' c6 h if energy <= 0 [ die ], o1 [" D# ?' i& M) V, B
]
5 ^/ z. v9 W V3 ?' bend+ Z7 K$ S! E/ b$ |* v
to regrow-grass
) w/ _% w8 m$ G* M ask patches [
3 P+ G$ W% }& A: u if random 100 < 3 [ set pcolor green ]
) ]) P* }9 w/ ~ D- B ]
; ^- f5 l# m, F3 |end
9 O8 [) _/ I& Z% {7 eto do-plots
, K1 @1 q, o" v" C) N set-current-plot "Totals"
% C, l# n; F4 E1 L' N% t# n set-current-plot-pen "turtles"+ k, n: Y0 |" U m0 _% b% s
plot count turtles- h9 p* t0 v% i, K+ Q$ H( O
set-current-plot-pen "grass"# f; t0 X# V- l$ E( D+ l* g4 b
plot count patches with [pcolor = green]
8 M r8 s2 b" j1 s1 Lend2 H& K/ ^- m# @# p, G8 Q! i2 w
可是运行时提示no such plot: "Totals"
" s6 g* P+ Z. Eerror while observer running SET-CURRENT-PLOT
; B, \8 G9 y1 A$ \, k called by procedure DO-PLOTS4 s7 `; ~1 Q. k
called by procedure SETUP2 j) P+ g1 T% t/ \5 \
called by 按钮 'setup'9 R- d; z# R0 K. f# }8 M/ Z
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
