我编的程序如下turtles-own [energy]0 _. V% z, T8 d, n
to setup+ O9 Q" Z+ q" P% | v1 S
clear-all
+ d7 w# T( z" U. b$ [8 P& J setup-patches* k* |0 \8 ~5 j& ~) c# L3 O* W2 w
create-turtles 100
$ [" s3 H4 f& w- F2 n+ t do-plots
2 `' x. R& r* _" P+ P. L& } ask turtles [ setxy random-xcor random-ycor ]* U. O, h% x3 y$ P9 b
end; F* F0 j9 R! P% L5 P. _. c1 H; A
to go
* a! S9 @1 H* G/ j/ A* h0 Q0 w move-turtles9 H4 f* n) [3 `" ~* c
eat-grass
- p+ b. |9 o9 E8 f1 R# D reproduce" _8 C1 m5 Q- C6 l: [9 B
check-death
: `$ q6 o& E; ?9 b$ l, y. c) t regrow-grass
6 T* {8 _' y/ Z do-plots
3 M# f* O% e* p! vend3 M6 J& U1 }1 r. z
to move-turtles: S# Q" _* o5 [, `
ask turtles [
1 m2 O o( y) l( @, _# J9 d right random 360! y5 C. k0 x* o# q6 a
forward 1
4 Q% q8 }: \- t set energy energy - 1 M: V. r+ C' F
]( b+ Z3 P6 Q2 m" P% I* w
end
/ B9 {+ }3 i, ]* Vto setup-patches
- D9 o. M; R) L, Q ask patches [ set pcolor green ]- X9 d p6 D( A$ c7 ~
end
5 X6 r0 {) w: bto setup-turtles
, K7 c8 a! U, K) _* z: O3 D0 @ create-turtles 1007 {) ~7 u" i% v) n# n' }0 S
ask turtles [ setxy random-xcor random-ycor ]
* E$ q7 m% ?% B" p, i; send
3 l, X$ M1 @6 m3 _; B4 z1 [to eat-grass
4 `# x6 T- X! c/ B ask turtles [0 M* K7 @6 s% i/ O( T
if pcolor = green [3 z% b- E: V. H, e; x7 V
set pcolor black
5 |% O5 ^+ v; j W4 a9 u9 V5 ]; h set energy (energy + 10)
% {7 }3 J0 Q7 b! \$ q ]
, C) h% ^$ A/ e& S3 a6 \% A ifelse show-energy?
3 o: E' t' e( D6 ~9 M5 q$ ` [ set label energy ], b* Q* B$ ^ Y2 Z7 `) g
[ set label "" ]
/ {: Y: u3 Z; Q- A ]
- S' N1 }- n# O4 F6 W$ }7 F4 wend* \0 T' Z( G4 x. B3 S1 m2 k
to reproduce
7 l' ~ F) t: I( n! W! R ask turtles [
" N: i) L; r- ]4 c if energy > 50 [
' M7 U2 ~1 N# r8 M set energy energy - 50! l; j+ R* p- x0 o7 M
hatch 1 [ set energy 50 ]
) e" I# y1 I4 \0 k3 q% ?9 R ]7 E8 j! w; d8 w' \1 z
]! f" D$ v, m) H5 t; I+ i( h
end4 w! A3 P. a8 v7 ]) L7 o
to check-death9 ^1 H3 [+ i- j, I/ l: M
ask turtles [( w+ |7 N) ]. O" P
if energy <= 0 [ die ]- f8 D: @3 ?" P2 T7 s) M6 O
]; L1 N. v4 [: b3 }8 f8 {
end& S9 _& d3 s* v! {! r. k4 ^
to regrow-grass
1 D- U4 f0 f$ \* h. m4 i ask patches [) s; I5 V& t+ \& t
if random 100 < 3 [ set pcolor green ]0 P1 R9 D/ Y! T3 N
]3 ~% V! [0 X/ X; }4 w9 J* p8 l8 @
end
. _: u: Z0 Q! w# d. |* l1 lto do-plots( I! V; D/ m' _9 U+ y" ]( n+ ]
set-current-plot "Totals"
% @2 J# O+ W8 V6 {9 {9 n9 X# e set-current-plot-pen "turtles"
* F; x; C2 w. b# Q plot count turtles3 f- H; Q, P+ t& s) x1 v
set-current-plot-pen "grass"
3 p" c: c! {5 }+ V5 c+ O+ F, c plot count patches with [pcolor = green]
! g7 s# E6 o% z+ V. z4 W- V% zend6 H( c5 M$ A: G- ~
可是运行时提示no such plot: "Totals"
# k( n. ]5 @9 }error while observer running SET-CURRENT-PLOT% }& _! G( h5 @" v" ]
called by procedure DO-PLOTS
2 s8 h f" i" W called by procedure SETUP ^! A- c9 \% z, |% [6 X8 N
called by 按钮 'setup'% [* V. _& K, n- X: U# N
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
