我编的程序如下turtles-own [energy]& C2 F3 a4 p' L
to setup+ X% N% p9 h9 J
clear-all
! c' q) c8 |8 d3 z& m l$ q8 e. X5 _, D setup-patches7 c# P0 ?; \7 m- e
create-turtles 100$ a4 z# w" L6 s4 ^! v/ U
do-plots
/ s( q/ I/ I# B1 l+ C ask turtles [ setxy random-xcor random-ycor ]
, z0 D9 t% \4 n) Zend
: N$ X9 w/ [& B8 ^8 d' W7 H/ Jto go
/ s" | l+ T2 G4 V/ z move-turtles
! y" z, t6 c# k3 a eat-grass
$ L& n, q; e. Q% [; a- v reproduce
/ x6 f2 `8 ` u% q) N check-death
8 Q+ W( l" x4 a: K% \* W$ A regrow-grass
" F V8 l/ S. S+ G8 ?' W9 [" I do-plots; q9 N0 |1 ]$ S$ G% w
end
* ]7 R. C4 }& {6 h% v! rto move-turtles
6 n1 ~9 M" d; W4 c1 n ask turtles [! v3 w% h* m3 p9 o7 F4 J% s# u
right random 360+ }" }( _# f. u( E' O1 f) X
forward 1
& @, Z" ~5 b0 O8 \: v( f set energy energy - 1
" n) o1 F: y3 c: d ]" Q1 K, W! I/ ?; X. H; n
end2 J8 H: a; G% a% D2 f
to setup-patches$ T t8 b. I: V# {
ask patches [ set pcolor green ]2 h, b, B7 P7 m/ X
end
3 [- \ f7 y, z$ T; Y6 ~to setup-turtles
8 Y* f7 N- J2 v create-turtles 100' F3 K( X% I/ K
ask turtles [ setxy random-xcor random-ycor ]
; V& ]1 v V9 z4 @ Hend
: x0 l% E. M8 v; e/ l2 M4 hto eat-grass
" X4 J5 Z. ~) G* X4 o ask turtles [
, ]7 ? T+ K1 L$ E) R/ s' }4 Z! p$ k if pcolor = green [" C f6 C: s3 x
set pcolor black
. B4 d. d g! W set energy (energy + 10), I: b, D! F3 J( _8 R
]+ `8 H: f+ o8 J3 t( Z
ifelse show-energy?$ D B" I; b" ~ |1 U1 u7 h y
[ set label energy ]. R, ^: }8 c: [. w4 W' R. v
[ set label "" ]1 H' l+ i! A- C8 J1 d; z; h% ?
]* |" `" G9 X3 y+ j+ H
end
. ~0 c' S* P( d; a- hto reproduce. ~# [; p8 e3 X7 p
ask turtles [% `. _' @7 a9 x
if energy > 50 [) \9 L0 q/ z2 E, M- c8 Q) D) c3 I
set energy energy - 50
) p. T. ?: H* l% u hatch 1 [ set energy 50 ]
5 T/ \. q9 M: t3 @5 Z ]
2 r3 y& U! J6 A3 V: v; v: M ]: X! L8 ^6 ?9 q& x$ a& [- T
end5 ~! {# x. [4 A
to check-death
7 w0 E& s: p8 g: E& ^ ask turtles [
+ C' s$ p* {# m- o if energy <= 0 [ die ]* i `8 h2 [2 \2 I+ @
]
" e( K9 T0 E1 { Zend
' v9 q4 s/ J$ |5 ^# W9 |) Y( M* ?to regrow-grass+ r; i- c7 W2 L
ask patches [
\" v9 M3 P' h4 c# R y if random 100 < 3 [ set pcolor green ]
' j( M( ^% B* V/ a! b- ~) C" y ]
; I4 r7 O% x# u6 |. r) Send* D; X5 u3 `% Y7 b
to do-plots% D# Y7 T4 i0 V0 n# o
set-current-plot "Totals"6 \6 B. e* T! g( Q
set-current-plot-pen "turtles"' s2 P; r: o. s' B( b5 L4 {$ X) r. R
plot count turtles8 s! Q, r2 a: |
set-current-plot-pen "grass"
' y( Q$ V0 T& T6 F9 M. S# H plot count patches with [pcolor = green], A! x* G5 y# g6 Q
end
/ G0 E) _7 s k, o N2 m可是运行时提示no such plot: "Totals"
3 N0 v( A# V; W3 Merror while observer running SET-CURRENT-PLOT! h: B0 @1 C+ N* i# g4 v% |. a
called by procedure DO-PLOTS6 F0 G3 Z3 ]+ _& G5 T* `+ M
called by procedure SETUP
2 g- k, T' } Q) d# d- X called by 按钮 'setup'1 b( j4 }6 x& f
求大神解答啊 |