我编的程序如下turtles-own [energy]
! G+ z, `7 K$ B+ u& Wto setup L6 n+ v w% @3 v6 B
clear-all0 @: N5 w* \: {' ^* A/ }( q( u
setup-patches
! r: C$ Z; H# O7 d" ` create-turtles 100
]$ D- W. X. D do-plots
) a; i1 Z* W' V. \' ^ ask turtles [ setxy random-xcor random-ycor ]
/ A) G# J; I) ^) p+ fend
( O; q+ I J- kto go
* H3 \( ?/ g8 F- h% q move-turtles
m, [" \$ \7 V0 v eat-grass- j7 Z9 Z: J8 U+ h
reproduce# |# a$ \, i. u+ I+ Z+ i% k& w
check-death
# |" h! j0 i' I/ u0 j" G" l- m7 h regrow-grass
% L& b- n4 o1 U+ f) T2 g do-plots) o4 _; K& X, T! h5 S
end
+ U5 b) _) `, B9 Y' @to move-turtles
3 i$ R8 H& w+ \) g1 W) l ask turtles [, C& I) t# K4 o% ]. h1 o
right random 360 T m' M' P8 [; z- }; X3 G
forward 1 s' F) Y k5 N) I6 @* b+ K" B
set energy energy - 1, E7 Q1 J/ f+ I5 K7 \3 u0 X$ }
]
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to setup-patches4 J- W& W6 G5 k! n# A* S4 {
ask patches [ set pcolor green ]
- Q5 s, o. }% r5 G1 zend
3 U ^5 c1 e: @7 [/ r) Bto setup-turtles
5 h9 Q( }6 Q3 Z9 B- E v' B create-turtles 100" \* Q7 K/ X6 W3 d% Z/ v
ask turtles [ setxy random-xcor random-ycor ]9 y& ?, x( Z9 f& U; q0 j
end$ `1 _# p+ q3 J
to eat-grass
' w/ x0 s2 N7 n ~8 N( u ask turtles [" ~6 H! y9 }% ~ L0 j: h
if pcolor = green [
: K3 u N5 c' k: m3 Q( q5 y set pcolor black, T5 Y0 J# {2 R6 {; r) K3 ~; t
set energy (energy + 10)
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ifelse show-energy?. s( g I2 v; m9 D
[ set label energy ]9 ^2 l$ o; K9 N$ \/ V/ K
[ set label "" ]
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end
8 M7 Q* Q! B# W7 |- ]to reproduce8 Q* o" f" b5 f) q; ?
ask turtles [
% F0 g8 U+ l" @& }1 k if energy > 50 [; N( _# M( z% f
set energy energy - 50
7 S0 }/ w! Y! Y! o1 M5 M hatch 1 [ set energy 50 ]
* z4 i- q; Z3 Z6 y3 L+ C ]2 e1 c& T" b. w" Y* O' ?) U# o
]
9 u$ K# W: |/ F7 }: {7 T* ^& Wend) M, X& G: f+ J
to check-death3 h+ o1 S* O/ d" ?3 r9 c3 j9 [8 t
ask turtles [
/ V- U% J X/ M3 F7 }% Z% B if energy <= 0 [ die ]
$ f H/ s! l7 R6 [2 P( R$ h/ T ]2 R5 p/ O0 H/ x. i" L b1 N7 I% k
end, t h* w1 r+ E8 K
to regrow-grass
4 P; x7 g; Y5 v# v1 M& n: _% W7 s ask patches [
K; _' K. S9 z+ ?" G# ~ if random 100 < 3 [ set pcolor green ]7 `) l5 S* W1 v+ I( b; ]
]# y' T5 _8 R% Q* m
end/ L% I; F% f% L3 g0 T5 o
to do-plots
, {' P$ t6 g+ \, s set-current-plot "Totals"4 C& {8 n0 e; o1 h1 @
set-current-plot-pen "turtles") D/ F7 R2 w. T" E# S4 P6 C- E
plot count turtles1 R V" i3 e4 G" `
set-current-plot-pen "grass"
9 G6 D* I; A5 s n" K plot count patches with [pcolor = green]! F9 Q+ ~; T2 X' i/ ~
end
' f b% C- f5 n. \ a+ O8 h0 |可是运行时提示no such plot: "Totals"! ?, Z% t, T5 ~5 w* J6 o$ S7 k4 l
error while observer running SET-CURRENT-PLOT
: N/ T( p+ j' s6 d1 Q called by procedure DO-PLOTS* h/ I3 }4 k. U7 }' {$ d& X7 _
called by procedure SETUP
! }6 ?' Q7 b4 A+ x6 ^- a( W called by 按钮 'setup'3 a" F% [% w" A Z, y8 q$ E
求大神解答啊 |