我编的程序如下turtles-own [energy]8 k, T; z$ ^6 b% E6 `; ]
to setup
9 P! L# c% d4 o! ^' ^* }3 J clear-all
}) e/ Y7 L/ M, U( ^ setup-patches
! ?& F0 b v: o create-turtles 1000 x+ P6 [9 T" _( M% U
do-plots
/ s7 v$ N5 i# @) x' v; A9 N3 [$ A ask turtles [ setxy random-xcor random-ycor ]
$ {5 R# f8 \$ F8 Z/ Fend
9 M$ k; k9 [* z- Lto go8 p2 ^$ k2 Y, U3 Y
move-turtles9 | b* J5 V) V# m
eat-grass5 L% M2 ~0 L H; `
reproduce( Z) h7 s4 [+ I; C! U6 | T
check-death
6 E7 \ Q! Y6 A) T7 {8 }8 |5 i regrow-grass
2 M Z7 c/ u, |" S# h" S do-plots
( V8 n. q, E# W9 B% Eend
9 U N: L* r! W3 T6 \to move-turtles
6 h% z; d; y9 k! v ask turtles [# ^1 ~+ z t3 v4 b
right random 360
5 u4 ^7 J% C9 C# A2 k( }5 v forward 16 \. u6 c! T& _, Q
set energy energy - 1& [3 L' n" C8 I, Z( A' q( ]) i
]
8 T1 `! ]% {. G' }8 ~5 eend* [! P$ x3 J3 ~3 s O, w+ M6 ]
to setup-patches. |' |* Q/ C9 z4 I6 e8 T" {1 ?
ask patches [ set pcolor green ]/ j: X$ P1 d* Y* O
end
$ F* Y' H/ B# P- u# e1 a% \to setup-turtles
7 ^6 t4 {* S; P1 L' q% o create-turtles 100
# X% A1 Z8 @, ]) y ask turtles [ setxy random-xcor random-ycor ]
8 E' [' [! A6 B6 c, j2 s1 mend
- {# }/ r2 k1 c/ E# J" O7 xto eat-grass
( ]8 Y, B* Y# Z, C8 P ask turtles [
% z9 B, s) |/ [3 q if pcolor = green [& e7 x( @# m# m- n2 h6 I& ^. d
set pcolor black
! y+ t/ i1 J% @ set energy (energy + 10)) z! I, E W# I9 r# Y$ `
]
( w& D2 F# j8 Z# J0 G% _! B ifelse show-energy?
& |6 q: }5 }5 G5 P [ set label energy ]
# t6 R i0 n: |: f0 V [ set label "" ]3 Y8 s4 a" ~* H+ M, P. [' v0 t
]
' H8 s- y$ m$ k( [( e% Zend* @+ y5 f: T" p5 S
to reproduce
% }% N1 u. t$ F7 N: L0 v6 y: F ask turtles [! b" y4 D0 `$ S* ?
if energy > 50 [
& p! D3 J3 v3 C8 ?, @+ v set energy energy - 50$ ~ @0 w7 E+ H) H" ?3 k
hatch 1 [ set energy 50 ]
+ p4 Q* m' ?% f7 b4 }0 f ]
- u5 ]3 Q6 v2 ?+ r ]
' X# G$ S1 l" y* Eend- h I2 S3 e% F) e
to check-death' U' J, W7 F/ d# H6 p
ask turtles [
4 D$ y5 {' W+ d! u7 I& H if energy <= 0 [ die ]
) R' `$ P0 `% p/ X) _ ]
" T! ^, k8 `0 V3 B# Wend
# ~/ g) g! x+ y; a% y9 vto regrow-grass ~, A# O4 o- I* _: B
ask patches [
# b5 Y' V% J/ d5 L5 `( w. h: F$ ` if random 100 < 3 [ set pcolor green ]- }* C4 z- S( m3 \4 D
], o+ {' J2 W) o' k" A
end% S6 Q3 [) v7 m: e
to do-plots4 s3 N$ A s3 X0 v7 K
set-current-plot "Totals"6 M1 V9 W! v5 S6 m
set-current-plot-pen "turtles"0 k+ p* E* ^& G$ W
plot count turtles2 V; K* X- U' g% U, u& a4 p* M
set-current-plot-pen "grass"
. F, k" d% L; D6 A8 Q plot count patches with [pcolor = green]) A' G, f2 i6 ~& k( ?' Q, w
end4 y* K9 \, S8 x6 o7 V
可是运行时提示no such plot: "Totals"( K$ v% o, Y4 Q, `( u1 l
error while observer running SET-CURRENT-PLOT
: r8 ^9 @4 u- b; R6 g, U& u called by procedure DO-PLOTS. p9 ]0 H2 v5 ~( } X: U* `
called by procedure SETUP6 } J3 E q/ x' g' a5 Z! C& W
called by 按钮 'setup'
. Y! ^( l% E8 h# T求大神解答啊 |