我编的程序如下turtles-own [energy]2 N$ `! a6 \, R' s. E8 O
to setup
0 h% H7 s5 ]; U1 z/ ^ clear-all
* O( W! f8 b4 n" h setup-patches
; w7 O: U) F& w" N1 q g: H' L- } create-turtles 100% b# r2 E* i( t' ?0 R7 M9 G7 u8 W* R
do-plots
$ T/ W+ U: k" j3 S7 ?: n% e( t1 R& S ask turtles [ setxy random-xcor random-ycor ]6 X/ d- z! y# w" _0 Z
end9 g0 H1 m9 {% @! L9 y
to go$ ?2 C5 N7 ~6 t. a" O
move-turtles
0 Q9 f* Y6 e) C* O) E4 e eat-grass1 `& ~2 l- B! P5 E5 r
reproduce
6 F$ j( Q+ U( W: {' M& f3 l7 F7 k check-death
4 V: G% `: T- H! I2 H9 T- P regrow-grass
0 _+ p) j( }- M( E do-plots2 S4 k: h: c6 t7 f6 O" ^, M5 }+ ^
end! \! m( R5 ~( P- _' q( H4 N
to move-turtles( E0 j0 a; `; d* w
ask turtles [
; |& r8 A5 r X# L% |( ]( s0 u right random 360) ^" v: P+ T$ B( k7 a
forward 1
+ _' N0 _* @) S8 ^ set energy energy - 1
7 r" Y5 i' e; p; r7 h ]' V) H/ n0 `2 T. w
end& L+ X0 Q: i" J; H
to setup-patches1 Y% v7 y( z/ j/ ]3 c
ask patches [ set pcolor green ], q( W' R+ U$ Z+ [' F Z1 X
end
5 r; `6 T { r) k: l( i Qto setup-turtles
! P1 g+ M3 |. U' O% D create-turtles 1005 [( ~; E) q0 t/ o. ~/ ]' A
ask turtles [ setxy random-xcor random-ycor ]4 ~( L8 ~1 u. d8 p
end
) \' I# Z3 v# u( M- xto eat-grass
3 M, O$ a: r! F# v) L ask turtles [
& w) T0 o# `# f- y$ E7 h: y1 Z# g if pcolor = green [& R1 [- |) i+ p$ c+ x; G- Q @
set pcolor black5 {. E9 o6 Z; G; e4 p6 _# L3 T
set energy (energy + 10)4 d2 `7 m, \$ D7 t
]
+ Q `8 r+ \1 ~8 X1 J ifelse show-energy?
+ \4 T' n m; u/ S [ set label energy ]
! [1 T) `9 u) H" E: e, y e Z+ |% b0 S [ set label "" ]
/ A4 a6 t7 \$ R% _" Z ]
7 H* S* ^6 p, ^end! ^; ?8 S5 a( T. v. R- C6 C
to reproduce$ O+ q& O+ I2 [4 e5 k
ask turtles [' g" K; l1 S) ~3 B
if energy > 50 [
- G7 ^1 R2 y- @! T set energy energy - 50+ k) X% e# }3 g( D4 ~
hatch 1 [ set energy 50 ]* z D+ p7 h: ]+ ]" }4 c3 K
]0 ?5 d( M4 Y- m. P' C2 ]
]
' p; Y; U$ c) q/ d+ ^3 p5 _; Wend
$ t: d: Q3 ~$ D2 Rto check-death. U) e# y$ \5 D- U8 s( U
ask turtles [
. `; D/ ~3 E. F+ ~1 ^) B if energy <= 0 [ die ]
. H4 {/ }: Z" b% X$ S1 b, } ]
* l; _) [/ ]/ G0 tend1 T- x; ~- I$ {- d' r
to regrow-grass
0 O% J, J% X. \8 J ask patches [7 I2 ^& o2 E+ C+ U
if random 100 < 3 [ set pcolor green ]) Q4 R4 j- e5 P1 ~ b
]
. i" a- e8 D" _- s% Aend2 H1 K9 Z' [9 `1 e/ y
to do-plots$ L+ C( n! P1 ]% A8 C( H% b0 N! v
set-current-plot "Totals": E7 @, J/ x7 K/ Y
set-current-plot-pen "turtles"
* |: i- x/ b3 b& F0 M+ i plot count turtles' z0 a/ P- d& k5 R [( |! O+ |4 R
set-current-plot-pen "grass"
8 G8 v7 ` L! L plot count patches with [pcolor = green]
+ g, P4 ^9 T1 O! J+ R! M1 tend
9 _* C* e6 O3 d" _- }2 G可是运行时提示no such plot: "Totals"
! s t/ |* ?4 F, berror while observer running SET-CURRENT-PLOT# T3 T9 t" V( g2 n4 S
called by procedure DO-PLOTS
. u# i3 c. ~) p) [/ C) K, ^ called by procedure SETUP
0 V) X; i7 N1 o; B# H- C called by 按钮 'setup': [6 N) s3 r. \1 h1 e! F
求大神解答啊 |