我编的程序如下turtles-own [energy]1 y1 }4 l* l! t& n& U
to setup
* _) F; _; ?% e9 E6 T) g; j clear-all
; ?/ d% ?, R) S setup-patches
( O0 A' I# ^" h7 g create-turtles 1003 M u; Q @2 ~
do-plots
1 C. u3 Y: H, U7 U2 q ask turtles [ setxy random-xcor random-ycor ]
* i. Z# ^, h1 @ @! h5 w4 _' }end' \( t* U+ [' E! R3 P" e
to go
9 I( e5 Q1 Q' ^8 |% q! w6 w move-turtles
0 Y1 h8 Z# x8 G" S eat-grass
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check-death; `5 t- @. f0 ~
regrow-grass' A8 y* J7 ^! [( f
do-plots# L# S$ C9 k9 c. f
end
: S; z& w1 z7 Q% c4 G! [; i$ nto move-turtles
; G2 p& M; F0 [9 g. B4 ]. f ask turtles [
, W# D' ?" I- i: u7 ^+ z right random 3602 o6 M. Y) y# @' P/ G) T9 E2 Q
forward 1
V J/ s) D) r: w: t+ I, _2 R set energy energy - 1
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end
% w) b: Y6 \+ hto setup-patches) b; v/ V( {8 \9 |, g; T t) {
ask patches [ set pcolor green ]
2 ?# o4 L! C, E# }! V; q3 Nend
/ l! J( L& c* Q. H, ~3 i* ]0 Mto setup-turtles
* K( s+ R* }/ x& ~ create-turtles 100- i! p, N$ f( x% E. j6 g9 e
ask turtles [ setxy random-xcor random-ycor ]
$ Y- [" k( ]) j9 L0 _end
7 D" r8 v( S* f8 P4 O8 B" ^1 lto eat-grass5 S% v) @( i% `7 [
ask turtles [
2 N% @* U: z6 c: ~/ g- b h& o if pcolor = green [7 j9 ^* [4 m, a @! c: u* x
set pcolor black
8 C6 s6 _8 J. [0 r set energy (energy + 10)* |. ^5 g0 s/ `; @
]8 \$ l' q- ?* _$ E0 G5 I
ifelse show-energy?
" S# Y0 J% U5 ]6 b [ set label energy ]
6 G y8 W! \' v3 ^ [ set label "" ]& z+ W n% f0 Y1 Y
]
! @4 o" u; o6 e" D- O1 tend
! t' Y) G2 _% L sto reproduce! `7 N0 ~ m* D& N* R& w
ask turtles [
0 ~( M" ^. ?" ]2 T: b5 W- B( N if energy > 50 [
2 V7 w* q, c; P; k# c set energy energy - 50
% n. }7 e- @! u2 X6 E5 y hatch 1 [ set energy 50 ]
0 Z8 V8 \! S) ^$ Z) P ]
2 {# i) b2 ?/ y# P9 E M8 r0 a ]) }2 B% K \' _% J& r7 x' G
end
7 |- B0 o9 V7 M. {) G4 ~3 vto check-death* b2 G, Q1 w; G. P
ask turtles [
# i, O7 D/ R+ B7 h0 V1 B( e B if energy <= 0 [ die ]
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end3 F3 ]: ]! O" G
to regrow-grass' Z& v( c1 k/ J
ask patches [
$ u9 y2 b" m" @. _5 v1 M: b1 M if random 100 < 3 [ set pcolor green ]
2 t) W4 s6 l' L1 t# a. _# P ]$ w2 k' Q' L) T$ O4 b2 W1 Y3 k
end/ C R, p& i$ C2 N, ~% X+ G, y2 M
to do-plots
" U) M" s3 L! l' \, q$ _ m* Y set-current-plot "Totals"
6 m1 ~1 r8 ~7 g' k! U set-current-plot-pen "turtles"
1 j1 t7 j1 Z! o2 Y$ P0 n } plot count turtles2 U! A4 f% v. d4 b7 ]
set-current-plot-pen "grass"
$ Q6 J) A4 q- `( n plot count patches with [pcolor = green]
6 ~- b1 t2 M- J& }end
4 R$ Y& f% f( f0 i3 i可是运行时提示no such plot: "Totals"
3 `6 ? @# Q3 {& L) [$ S$ ~error while observer running SET-CURRENT-PLOT+ E2 O$ T2 j- W: C7 P3 b& o
called by procedure DO-PLOTS& \0 T9 ], k/ s$ O: A, `
called by procedure SETUP$ b% x% h- {' ^% g. {4 {
called by 按钮 'setup'# q* E* e4 K+ p& |1 z
求大神解答啊 |