我编的程序如下turtles-own [energy] k9 t1 ?/ ^: U4 I4 Z5 V+ w
to setup
+ r1 c, k3 N7 ~1 W' {4 J" r( f2 Y. J clear-all) f; I1 Q3 N4 J% R
setup-patches* A* \8 ^4 t2 E2 D) m8 |
create-turtles 1008 @- z. H+ j" A# M; {9 l0 Z
do-plots
7 ?+ h" F/ L" Y6 o ask turtles [ setxy random-xcor random-ycor ]: D" u% K8 Q) _% m2 l, H
end0 B. Q0 P/ r0 X
to go
( D# |. T; S* `0 j3 ^ move-turtles
8 X& `" ^6 Z" a7 ] eat-grass
) ^; W9 ~3 W& n; m reproduce
H, \* `" H3 Y9 s* G0 f3 U check-death4 g5 `4 q1 m- p0 C* {( d; ]8 w
regrow-grass' |2 ]) F" E; ?' ^
do-plots3 L6 |# d' L" |; a. D0 ?
end
/ b0 k4 z! v7 V. nto move-turtles
: r1 Z8 E& n. r# P) Q+ e' Z' n ask turtles [, B8 q% p# G" ?0 K+ t0 r
right random 360
) L4 i3 H" |3 `! j! s forward 17 l% B! q3 ?9 s2 X, Z3 n
set energy energy - 1: |- d0 W+ j1 } j. K! F, c6 @9 Z7 `* r
]
. m. R% x* ^( n- Fend1 L# I5 C- ]7 C3 p* l, B
to setup-patches
) {# e: }$ j. l" V t8 T ask patches [ set pcolor green ]
- i9 }. _$ _" Y' V; J ~end9 [. [+ F$ Q( A. J- U% E7 U6 g% g
to setup-turtles! S C2 q( h6 D! Y8 j( _; p
create-turtles 100
' d7 X+ a# Y$ Q( M! V3 N4 ?* u ask turtles [ setxy random-xcor random-ycor ]
s( @! Y. M7 i: T) Bend
* f* H% F" `: T3 m) K; ?# q) e0 p8 yto eat-grass; n5 ^" O$ F/ v5 v4 b) Q8 |
ask turtles [3 j/ |' J: E8 H* n( }
if pcolor = green [7 E% e& |' l9 s1 C8 v t
set pcolor black/ \6 C( W' y) H0 m* n/ @
set energy (energy + 10)
0 \7 P9 h& N+ j! b- t* T ]
% Y1 }; ?( v6 r; e- D) f2 d; k9 } ifelse show-energy?5 J7 q% q) x9 U E8 b) E, H9 R
[ set label energy ]8 |. {$ f5 \, q: d2 F) w
[ set label "" ] D7 E! t% R* _# u6 Y
]
/ h; W8 i# `# x, [9 Uend/ E+ D' {: t0 S. A7 h! X2 _" w2 X
to reproduce
0 k0 m, s; h0 m, T8 Z" c$ V ask turtles [
2 Z8 [6 G4 ~0 o) i, p5 |6 ] if energy > 50 [
3 v; P, L r! D4 { set energy energy - 50
3 _! o. h. Q9 L. E) Z, i* _. V9 B hatch 1 [ set energy 50 ]' `1 W! W3 D3 l3 e9 M
]3 j3 S$ Q2 L' _% I0 j! u+ D7 W
]' V2 _, W! N* }3 S
end
# d' u9 s9 c! {& ]5 @# J2 o/ |to check-death
; w4 | c0 x$ M2 o7 J ask turtles [
. k8 {8 z. s$ N' n* O- B, S' u if energy <= 0 [ die ]
( a m# T, h& M4 Q ]
& N: O" m7 j: ^end
9 Y v' E3 @# K3 x- Q6 n/ y2 @to regrow-grass3 Z1 |8 u( \: E( L% h2 @
ask patches [
8 \! h( u4 D& ~+ ]2 v! ] if random 100 < 3 [ set pcolor green ]0 S( Q2 e$ f0 v) V* z) W$ J
]
7 ]0 m! \9 j O) J! t' i L7 r/ X9 Send
$ p' }/ U- K& sto do-plots
! u$ X4 @% }& Y8 W8 ]9 g) m set-current-plot "Totals": a' G3 X/ D. x. E( z/ ]5 E+ t" \
set-current-plot-pen "turtles"
: Z# o( r k: | plot count turtles
7 H4 B" {, z' c) \ set-current-plot-pen "grass"* ?) H! [* W( L" t
plot count patches with [pcolor = green]( E4 }4 Q5 I, N, ]9 d
end
+ H6 S9 f; V4 n+ z可是运行时提示no such plot: "Totals"; k( ?: m. g2 b: ]. l
error while observer running SET-CURRENT-PLOT
8 y/ V) S! S! ] called by procedure DO-PLOTS
! J# H* I( P$ S called by procedure SETUP9 m4 V5 S' v; b4 c/ |1 X3 b
called by 按钮 'setup'
$ G( `9 x( y0 F% g9 j7 O5 z) @求大神解答啊 |