我编的程序如下turtles-own [energy]
1 B2 V9 e! h& x8 x1 Oto setup
S( _8 n( |" N% {& z/ K; B+ T& Z: D clear-all
+ w+ C( \4 w% B4 ? setup-patches2 ^; S" p5 |7 L) C5 L
create-turtles 100
6 e% c' w" g4 ]) I) @2 J do-plots
7 z. F9 U: S+ e ask turtles [ setxy random-xcor random-ycor ]
8 L" j7 r( Y; M( ]: Uend
, g1 l: _0 [% R- N7 r. Jto go
- S: H5 O8 Q1 z$ Q9 s& F, x move-turtles
" _/ ^' Z! S2 i) Q5 p5 c! `3 U eat-grass; F! A9 C0 {2 z6 S
reproduce: V% r* \2 @# j) O7 X# D
check-death
) n9 X! R, }* [4 v/ h8 k. z regrow-grass
. q9 y7 h: O+ A7 _& R. C do-plots
; D7 a1 h5 ~1 d. V. e0 w6 Wend" ~( H! _6 H& s
to move-turtles
5 Z/ `5 Q7 k; T8 _& O ask turtles [( z9 ^* }6 J# Z5 I' W
right random 360+ U' F0 F! F$ D
forward 1& p8 D8 I( a7 M' {* X6 J k$ F8 X8 o( i
set energy energy - 1
0 l F% g U& E. _2 r ]. ?% a0 l Z- q4 z8 s) b
end
! F+ n1 g7 \; Y: L9 w) p+ u L( G( Jto setup-patches
- J* v6 Z0 v$ g& m6 H ask patches [ set pcolor green ]
- r7 e) k+ j2 L7 v6 iend0 d/ [4 c7 P' s
to setup-turtles
( f: N+ s, v( G/ I) T/ ? create-turtles 1009 e) x1 F3 ~9 q9 |/ w( k+ H" q* y
ask turtles [ setxy random-xcor random-ycor ]
9 l) p6 @: c3 qend
/ }; h; {! j5 C# r, rto eat-grass) k8 M) ~. V+ J2 E
ask turtles [
* \* n' p$ R+ B; w if pcolor = green [( k2 O( M9 D- f z" k \) w
set pcolor black: s) k. E, F: J j& L7 Y
set energy (energy + 10)
8 U9 Y% g1 K6 X4 [8 \ ]5 @2 H$ I1 y. C* j; F3 F5 k
ifelse show-energy?
* ^! ]1 Q+ m, Q% p9 j [ set label energy ]
: d+ `/ r% o8 V1 Q" J# N8 @# ?" K. J [ set label "" ]
- X4 C0 ?3 a4 d2 {& |1 v9 w ]) m: S/ y4 S7 H+ a$ p, b% _% k
end
! Z& V4 j9 }( Hto reproduce$ X; U4 {& ?3 _2 k9 H
ask turtles [7 F" A. ^# j" f
if energy > 50 [, S! ~" m" \4 b/ H' v) D
set energy energy - 50$ O" H% w8 k. F+ ^+ i8 k9 G
hatch 1 [ set energy 50 ]
% x$ P. A* e [ ]. w+ u3 H: _1 Z# {7 m H ~2 e
]
/ ~3 W2 |! Z4 o/ N7 ^; zend# @: g% ~! q$ G6 M/ E9 s7 v
to check-death
) D0 [% w3 T& ?6 V& j: g ask turtles [
4 q2 d7 U3 O# ]$ l" N if energy <= 0 [ die ]
. L& o6 N' {: [$ b8 U! _3 [ ]* G( j: m# m5 C3 j
end! G, A, o8 s7 A4 {4 `
to regrow-grass* b6 S6 G: v" W
ask patches [. a' S, G! _. m
if random 100 < 3 [ set pcolor green ]
5 [3 ~# k% f+ l/ m7 I6 a ]) X3 U3 A3 @6 s6 ^' @2 D
end" Q6 a2 A8 j5 p
to do-plots
' N @9 r( [0 ?0 o3 L4 w) g$ O set-current-plot "Totals"
& h& b7 `8 R) f' O5 }/ {+ m set-current-plot-pen "turtles"/ C3 y4 x( p4 f, e% S/ E
plot count turtles
- q0 E4 U: ^7 ^ set-current-plot-pen "grass"
8 i$ \8 a6 B1 i7 } plot count patches with [pcolor = green]
7 N4 M- V) w' N6 ]# Kend
1 J7 C8 m+ W) j$ s6 I6 a% w2 j可是运行时提示no such plot: "Totals"; _& X* @) V1 T+ n6 |; _& X) l# X
error while observer running SET-CURRENT-PLOT; }8 C6 Q9 U1 L0 }
called by procedure DO-PLOTS+ }( r9 ` j4 G9 l, i' f
called by procedure SETUP
( H3 i( W9 J$ Y called by 按钮 'setup', G& l) y' m7 e+ N
求大神解答啊 |