我编的程序如下turtles-own [energy]
( B2 L1 x- O0 @' Z: A) t5 Xto setup$ r8 _ p3 o. I$ N. M$ k
clear-all
% q6 \. c/ F; z1 O4 t setup-patches
6 \ u( y5 Q$ b# Q$ } create-turtles 100/ X: E X* @: e9 e) T. _
do-plots
# l- g7 w( a, F7 O$ q ask turtles [ setxy random-xcor random-ycor ]
: V. w6 f" n3 q9 o4 Zend
: l6 K. Y0 S2 D8 kto go
2 }) ?6 @# I4 N' a3 T& t move-turtles
9 M% Y4 x$ Q" n Z% d eat-grass# c# b0 M6 O" \3 d6 v6 T
reproduce
$ D9 Z* i) s7 w# n7 h check-death
) [6 U6 T0 W q. }7 i7 \0 F7 K. | regrow-grass. J8 l, L1 p# Q6 x1 W6 i5 B3 O
do-plots7 |* R5 |. K, O6 ?4 V
end
1 f% | L7 w% F& m& Mto move-turtles8 r( R- p% M' m" U6 h
ask turtles [
, c d' t" W W5 n7 [ right random 360" ^$ ~9 w, I3 S# [5 W) w; H
forward 1, p( W: h3 @/ D
set energy energy - 1
2 q0 ~1 B& Z$ R2 \# R$ a/ H* w ]
7 F! Y8 u, ?4 b# L' f( A% `end! w: p' q" h, y! L" ?
to setup-patches' `2 ^! [( @. T: R3 i
ask patches [ set pcolor green ]
8 i t0 j; Y8 S3 zend. I' R1 n9 [1 K2 E
to setup-turtles
2 I& F( x9 a8 |" x$ P create-turtles 1006 c8 \3 G) J' @) [" \" G: k
ask turtles [ setxy random-xcor random-ycor ]( }/ T" a& r9 M2 i+ d! Y
end" ]4 b, Y! O* U) i" \
to eat-grass2 P% F$ p* j7 V& P/ M4 `
ask turtles [5 z: z+ r5 T; }0 z; T
if pcolor = green [
1 a8 w8 e/ q$ @+ ` set pcolor black: e y( \' m2 Z7 ?
set energy (energy + 10)
. b; {) O9 t/ R+ \ ]
8 i$ M" N; o7 d; q ifelse show-energy?: W5 m4 {2 W- h: v: W
[ set label energy ]
! b' a1 `( }! I [ set label "" ]
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end
# u4 H' d j+ Ato reproduce. F6 V; n* w! \ q L- {% k
ask turtles [
9 S7 `# n4 _0 u9 l2 v/ g' | if energy > 50 [
, g9 h$ |4 l$ @+ q5 m5 j6 P set energy energy - 50" k7 r0 o- G, H0 J, N8 N
hatch 1 [ set energy 50 ]
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]4 l5 e# T5 d/ ]9 {) } B+ w
end
) b; r K0 v* G* Lto check-death
0 O% Y- [% ~+ W& Y" i( g l ask turtles [
" L4 o2 K Y B. Y; Y if energy <= 0 [ die ]# w" D3 x% i) S" y5 x1 C8 G
]" i2 D; |/ h' e0 W1 g; r
end
' C4 a/ N, L zto regrow-grass5 n6 q4 U/ r3 V8 B: M/ L
ask patches [0 J3 m' _, \: G( G5 M2 ?" o
if random 100 < 3 [ set pcolor green ]
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end
( i$ f& Q7 w4 @2 eto do-plots
! P6 [) a/ R: P5 J set-current-plot "Totals"
( o" y- N) n! Y& B8 E8 Y set-current-plot-pen "turtles"
( |/ [3 @3 \; o, r5 ^ plot count turtles
5 l0 j/ c9 r# z set-current-plot-pen "grass"! T& e5 P' k. A5 `6 M: t& Y+ z# V
plot count patches with [pcolor = green]1 G4 W$ Y- {. o: r. \; Z
end
2 U) S$ n" X; ~" B, J4 K可是运行时提示no such plot: "Totals"( h0 s/ G5 M1 y# u3 C. P; `5 m5 t
error while observer running SET-CURRENT-PLOT: d( g* L$ |3 ~, x% w) R: o
called by procedure DO-PLOTS1 B$ K. e5 V0 d; h
called by procedure SETUP* x- s/ ~& K( Y7 G7 f
called by 按钮 'setup'
; d! k: x5 G% q, G求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
