我编的程序如下turtles-own [energy]+ x1 o0 ^: V% u9 w }
to setup
5 `/ w0 {( D& P+ N5 E7 W clear-all v+ C( \; {4 u U* s" q
setup-patches3 C1 S$ K( u( \+ L/ P- g
create-turtles 100- n0 C* A+ ^. v S
do-plots
7 }3 Q; n% K- s5 V7 Z ask turtles [ setxy random-xcor random-ycor ]
* U0 W( U* j" m) ^6 ~1 Send
( W% y. J& B! ?# f5 j% P: p0 ^to go; }9 J. M7 ^7 e7 ]$ Y. o% X
move-turtles
2 |2 W9 d- i1 }* R eat-grass
0 P% |% r, Q4 Y, L reproduce
- _, y, o% X7 ?' t check-death* T$ z0 F* @2 t
regrow-grass
1 w' p" [6 E6 v2 f do-plots' p( f5 T; z9 A4 r6 S" U
end: w( v* I4 W; T% ^$ j, s+ a+ n
to move-turtles
& Z/ I: K% x* \1 y- s& M) _ ask turtles [
9 Z9 C# q/ S( ^4 E2 z' F1 e% f right random 3603 l! G& L4 a4 @6 W- h" | A3 M
forward 15 ?* g1 _' {. A# `9 ?; I5 W! q5 i {
set energy energy - 1
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end
" r1 j. V; s: L5 L" V& rto setup-patches
4 o j8 P# _* q. x' N ask patches [ set pcolor green ]% g9 Q6 C1 l7 o
end& J L' Y. k) I: i
to setup-turtles
5 J% s$ {- C( k& ?5 J, ?# T6 \ create-turtles 100
. n2 T4 ]! F% }0 U( B: c6 ~ ask turtles [ setxy random-xcor random-ycor ]+ v- i% E( a6 R" Q$ V- B
end; O( }1 p) H$ W, }
to eat-grass
N3 G) u8 B( e, Y8 t' w ask turtles [1 v- y5 I4 B4 U$ w1 K D) z4 n( y
if pcolor = green [
( k" y; E1 I0 Q! ` set pcolor black
/ n) c, L' D' A9 ?8 u+ N set energy (energy + 10)
* b1 c8 _0 L* w! s0 J' j' s' ~ ]
! M; a5 ? v+ f ifelse show-energy?
3 s& Z G) ?7 z+ A6 k [ set label energy ]8 j! [- N: L# g. j% k
[ set label "" ]
) u, \' s2 T1 L; G L4 p ]
& { w; I j7 j. ?. Xend. A& [% Z0 ~8 I* T
to reproduce
4 x7 Q' k+ c! Q; V! x/ r9 P ask turtles [' [% m2 d3 B- F1 ?$ P
if energy > 50 [
8 ?* r. L+ k' W' p2 a$ X- {) z set energy energy - 50
5 S) H* l7 w: q @1 [1 @ hatch 1 [ set energy 50 ]6 e! D3 Q$ I L9 o8 E' q
]' o9 U; p! Q% |$ H3 M" U# D
]1 |4 ?# G8 K3 F! Y8 g; Z) b+ Y
end
" X e/ v$ J( c( K! z- C, E, Fto check-death
* T- m" j/ l, b! ^# n2 {: ^; z. f! R ask turtles [! N0 I9 ~% R/ i4 _" G
if energy <= 0 [ die ]% ]; o8 L8 a1 W% U* F( H4 }* A( l
]8 F, m" N0 p; b* M% w
end: F2 ~2 \7 N( w+ B# K) D1 I' v9 ~
to regrow-grass' ]! e5 V x2 {! a0 h0 `
ask patches [3 s; n+ p W; D
if random 100 < 3 [ set pcolor green ]
4 c$ f1 a# [- ^8 z ]
* Z% t4 c) A/ R2 `$ A2 gend
2 u1 e; x' j* {5 d* w8 @# Q% M0 kto do-plots
% a" P m+ u' o; `+ N% T7 H5 G" i set-current-plot "Totals"' h. D P7 l9 Z
set-current-plot-pen "turtles"* x& N9 ^ y' c' A* Q
plot count turtles4 B' w: T4 Y; Q" R: i: ~- @! x
set-current-plot-pen "grass"9 O T- n8 [5 d* Q! W' x% N7 P
plot count patches with [pcolor = green]
3 }- R& o8 [' A2 x# @ R6 Fend) ^" s7 \% L2 S( d
可是运行时提示no such plot: "Totals"
1 j* V6 K* w- @$ |* r1 d- perror while observer running SET-CURRENT-PLOT
* M6 s( O3 A) p) k0 T3 j called by procedure DO-PLOTS# W1 w$ S& W4 ~/ [' n
called by procedure SETUP) g9 w. d/ Z4 n
called by 按钮 'setup'
, L: U+ u1 P/ w- J0 s, j求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
