我编的程序如下turtles-own [energy]
\3 K6 R8 n& g4 n/ Pto setup6 @1 ^9 z# o7 m9 _8 g
clear-all/ r9 i1 w9 a) W
setup-patches$ P& x7 [5 t/ i4 l: \
create-turtles 100
; c5 u* N& A5 Q) x" S9 o Z9 U do-plots% P& x9 {! g* z
ask turtles [ setxy random-xcor random-ycor ]
6 ]2 l& @( o- ?9 e- fend
4 b" M9 B p2 R& ito go
3 N+ t: E$ B7 O; p move-turtles8 d8 x' ]; _8 i; C. a) ^$ Z
eat-grass
% D& H; v& t$ r8 y: i reproduce
2 V+ U6 M a; X( l' M" K+ D4 M check-death
7 t* P/ l# I' I regrow-grass* A$ f+ U5 f$ X# K, A0 X
do-plots! ?+ ?4 i; G+ ^5 N
end
! f, ^% w, d& p, @, r# k* Jto move-turtles
) f" |# U, ^& w) y4 H9 e- Z" d. m ask turtles [
! C, j. ~' A$ T1 V right random 360, v0 r2 }9 N, a+ ]
forward 1
Y9 {. X$ e0 p2 i/ s( k' T$ Q: K set energy energy - 1
5 Y% m5 t8 H \5 C5 _+ q8 m ]6 b" B; X: z& t$ r" D6 m; O
end. @2 e# x# Y y( K( g, f4 ^0 d
to setup-patches3 s7 Y: k6 ^: b6 n; H: q
ask patches [ set pcolor green ]$ v# t( s$ g F& s E4 @/ b. ?
end
7 E9 a2 U% P7 L3 F9 o w9 b# v! Tto setup-turtles
+ `3 g/ p) }2 }6 z4 L create-turtles 1006 E7 E `0 Q0 @5 i$ _# v" E
ask turtles [ setxy random-xcor random-ycor ]
* K, {9 a7 ]6 C0 _% Gend: y: ] x* Q! Q( B/ X4 l
to eat-grass2 M7 e+ K$ I+ _2 s$ y: w
ask turtles [
: ` t' `$ |, s6 M. Q# v, f. A* U if pcolor = green [
; A+ _+ W! t4 O' @5 G1 { set pcolor black/ ~; J' Z5 C- h
set energy (energy + 10)" I$ a4 O) U, M. E, g
]
) f n+ w) G& v; G- O* E5 R$ k ifelse show-energy?
1 \2 J1 q2 W5 V {' N6 B& K% i# U6 X [ set label energy ]
* e8 P) x% S) R: ]+ g [ set label "" ]
% T5 Q. ~' ?% N# G4 k5 | ]9 G5 s$ r, Q7 i1 p3 F
end
4 O( t; `' K# p3 N& E# |to reproduce
( X1 u' I2 \) ]0 P6 h# x& P ask turtles [% M# t3 t$ f" v* O2 p- W
if energy > 50 [
# F6 A9 W% f6 B7 a9 N, _0 j& e set energy energy - 50
; v9 p: g+ n& A- D hatch 1 [ set energy 50 ]
$ }6 w3 ]; q2 r, m6 o/ ] ]
& r# g: m8 ?1 C5 g5 p q4 n ]% K/ E/ ^/ |. I
end0 G* `6 J/ B4 O+ W% U
to check-death6 q. f/ C! J$ }0 U8 j
ask turtles [+ D" X; e1 j7 B. y }5 v; V
if energy <= 0 [ die ]% W8 k& j) A R9 A
]0 G- d& p( Z& Q7 g
end
& ~! U5 w% i' r2 {to regrow-grass# O* q3 X( u2 h7 w" v# Y& R
ask patches [
}+ M7 p/ P) `8 F4 F2 E* _4 D if random 100 < 3 [ set pcolor green ] a! N5 C4 M' H
]
' g# z O2 ~; [. [; R3 F% Rend/ X( v- O* z# J* F3 ?& j: I& ]# c
to do-plots c6 b# n, W/ J9 P) _1 @
set-current-plot "Totals"6 p5 j/ [5 h# S" o
set-current-plot-pen "turtles"
. r4 I5 {+ ~( t4 \2 a plot count turtles
, v6 @7 B8 W) x% I% M7 F set-current-plot-pen "grass"
; }' W2 Y5 v- x' P1 x) T0 @7 L* l plot count patches with [pcolor = green]+ m4 k+ S! l; i d
end; f0 ~# {; b0 e& w
可是运行时提示no such plot: "Totals"
* a4 g) t: n8 S3 t' ~2 Uerror while observer running SET-CURRENT-PLOT8 l3 T' E" `& P6 p( y
called by procedure DO-PLOTS
N! `5 @% {5 y3 q+ C called by procedure SETUP
# s. T- C8 F' T! R0 f4 `7 _9 N called by 按钮 'setup'. }, }' {3 C8 D% ~) n1 V
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
