我编的程序如下turtles-own [energy]. E N2 f6 S, G2 q* u8 V
to setup" o3 j, j/ [7 K/ Z8 V
clear-all
+ o& @7 Q* b7 t% l( g1 `0 R$ X setup-patches
" l! T4 f* Y8 j2 c- P create-turtles 100
3 ^# O& a( w4 _: s" u4 K do-plots% J% E, E0 E/ j8 k5 I" Y1 W. n
ask turtles [ setxy random-xcor random-ycor ]
9 ~8 w0 _# J0 A2 V8 D: P. b6 l2 Rend
4 L8 F) e* b/ M Q3 d: `/ i; wto go x! o$ G1 ^1 q7 t
move-turtles
" ?- ^! i9 _# I) }5 `3 ?. d$ o- Z eat-grass
- m" |8 V2 s' f1 H- t reproduce
1 G0 X5 g0 g; E8 I check-death! f, i( {/ I" T! |% i- K
regrow-grass8 V {- y" v8 e8 L9 g" B' t' j
do-plots& O' b, D K& ^! x' \, I$ o2 X
end- I0 i/ K, v$ F( m8 @
to move-turtles6 h4 V4 t( [; J# H0 x7 A
ask turtles [
! u3 I8 B; @, T right random 360) R9 y2 T6 M) P
forward 1
* }! g1 A; n% M' g; d set energy energy - 16 a+ c4 F- q, }, y4 t
]
7 w- j3 C! w% X& J. m7 Dend2 w* ^+ ^0 ]% U5 Z$ e' Y) h
to setup-patches; a' S* p; r5 n+ |# r. C
ask patches [ set pcolor green ]% N& Z8 T; ?" H5 X$ t @6 G3 H, n
end4 \! e) H9 V& w
to setup-turtles# x# V# K2 K1 q$ V
create-turtles 100
8 @$ Y% r' T- ` ask turtles [ setxy random-xcor random-ycor ]
& Y/ C3 z5 ]: ~& F8 a) `end; D J2 |7 n/ z/ j$ g/ X, B
to eat-grass6 p* `; {- R3 J/ |+ o( g
ask turtles [
8 _' _9 G' T" j5 m9 L- k( M4 y if pcolor = green [
0 L2 l% X: Y5 Q* F set pcolor black0 P: H( U* [: y0 M, _/ X. D
set energy (energy + 10)6 ]3 S3 W6 q5 [7 A; D5 s" k
]: C& m! n# [# H" A' [2 n+ X- m6 N
ifelse show-energy?1 R! j, W+ K( y
[ set label energy ]- u& f5 Y4 `$ a( U5 ]- J
[ set label "" ]: F3 Y& U' F) s% e
]
+ g# j* B; a/ s/ M2 S6 lend" h3 O p; C8 B" Y4 o
to reproduce, C) u/ e+ K+ M8 ~' W8 a# X
ask turtles [$ g' [& W! U) T8 n+ Q; ?2 A' W
if energy > 50 [8 _1 z9 B9 R) D0 Z% \* H/ I/ i
set energy energy - 50
# t1 `8 t2 h1 g; e' y hatch 1 [ set energy 50 ]. j- V5 C5 M' K; m) v3 Z' a; P3 U
]
1 k, s O5 x! t$ _! |3 }) l ]# }& d6 ^7 u" R# ^+ L
end3 W+ ~- J# X6 ?) ^8 ^; C; {
to check-death# g+ P6 O/ U& n; P
ask turtles [
Z! y" T r7 H* [# j0 P, E/ q ^6 m if energy <= 0 [ die ]
) g0 @& @ z' f1 g/ Z L- Q ]
, \- A7 }( q$ M9 `: @3 G0 w/ T1 E! Vend* f8 j+ S2 t% a0 L4 T+ N
to regrow-grass4 }7 z6 E3 p/ f& { O0 T4 r" `
ask patches [6 v4 a& C& u" K/ V Z2 {( y, m
if random 100 < 3 [ set pcolor green ]
4 M, S R: W, b ]
z+ _; j, T2 p8 mend
; a7 i! U0 w; C* ito do-plots
7 h" n+ R2 e& J( F. u set-current-plot "Totals"/ N2 [' p; I( }) |0 ]
set-current-plot-pen "turtles"
" {, A0 [1 F9 D5 u$ n3 Z plot count turtles
[3 T+ N. B9 v' D; N- B set-current-plot-pen "grass"
- Q7 E" N7 ^# L+ |3 G6 G- M plot count patches with [pcolor = green]) j/ `2 }$ V& Q1 V0 a
end
9 z; I+ F7 C% Q' o$ b* C可是运行时提示no such plot: "Totals" ~) c/ `! [& F/ K* N
error while observer running SET-CURRENT-PLOT0 u, ^0 C) i6 C# N
called by procedure DO-PLOTS
5 Z5 e# z' Q n; i7 C- L% ` called by procedure SETUP# W* L% }9 c/ h. W+ I. Z
called by 按钮 'setup'
! i; e0 G+ y0 \: ?求大神解答啊 |