我编的程序如下turtles-own [energy]" q& }& U7 w! f! h
to setup0 Q- s) p" _; K( y0 t6 d
clear-all
: V) l8 n3 {1 y% x( I0 x, { setup-patches" C8 M, O+ Z, i& @
create-turtles 100" j. U" c$ W' A5 j J2 ~
do-plots
8 X: L" A4 P) ? ask turtles [ setxy random-xcor random-ycor ] \" B" j: }/ d2 K
end v8 U" z% d6 |/ f7 o1 X
to go
2 f1 ~ P+ u8 Z move-turtles
3 R7 ]( H( l! q) i+ T eat-grass
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check-death
( b* ^8 F+ l: r2 I S Q+ B regrow-grass
0 h- L0 o3 `' s- m do-plots
2 h3 q4 C, c, H: K8 |0 H8 Xend
$ A; _2 _: b1 p2 _; sto move-turtles- S0 w! j: @. s7 I/ [7 \) Y% E
ask turtles [
, \& P1 i, G8 S7 D i1 X; ~$ I2 h( I right random 3602 Z! S- _( ?4 a \% N" U9 w
forward 1
- f' N9 o% N5 q8 O7 l! Q: g; m set energy energy - 1. E" U! I3 R' u4 E& E4 u7 J
]
; B4 O" Z$ o$ g' O: O x* dend
d' Y9 \2 I7 yto setup-patches& C! m. j' M. t+ Y( b% y$ L# C
ask patches [ set pcolor green ]
+ R4 y" Z+ U& \3 o. k8 Bend' F% t F$ \ \' E
to setup-turtles* J7 O) j6 m7 }2 i
create-turtles 100
* s# n* u, i# w7 i0 p0 g ask turtles [ setxy random-xcor random-ycor ]
) D1 Z+ K0 T0 H8 k4 R( uend
8 p* o! Y3 C( c: L% oto eat-grass
$ g. F& @' ^# L8 Q% ~* J1 @: p8 W ask turtles [
4 j+ F! N% T& C4 X) T5 Q; q if pcolor = green [, x. f: Q8 l3 E! s) J
set pcolor black
/ N5 _5 G: a& `; M1 v6 o! f$ i3 [% W set energy (energy + 10)6 Z2 A. M, O1 u. V4 R& h
]
3 s5 L9 t8 N ]6 w ifelse show-energy?
: \2 z$ Y( w o5 F1 B. @& t& S2 } [ set label energy ]
! T2 k% \% t# w4 P3 z' F [ set label "" ]
# m+ m5 W+ F/ G$ E2 Z ]* |4 `* S' |+ C% |5 O% @
end
0 U; s" c+ N3 j, k2 [% Fto reproduce" i4 u& T; v" H# B8 E
ask turtles [: o8 o. q' V5 |# ^* H7 h6 F
if energy > 50 [+ t, g( `& C3 b, b
set energy energy - 50
E2 f) K [0 K hatch 1 [ set energy 50 ], Y) i1 V1 K4 H1 H& ~1 R! _
]- t& R' D0 A& q& E3 r
]5 U# S% D9 S% A ]- O
end
1 V9 l# P! ]0 r; Qto check-death
2 J; G" ~+ a4 G5 S8 B0 h ask turtles [3 ]: V7 |- F1 H7 y/ E- k+ |" o) T' w
if energy <= 0 [ die ]8 @1 }4 N& s* [6 h/ u9 X
]
3 A G) T1 X, Lend+ F' X% O% {& ?0 f- |, D5 O
to regrow-grass
; `. Q/ S* P% A* _ ask patches [9 C) a% y+ d `7 _2 S
if random 100 < 3 [ set pcolor green ]
' j6 V8 X B( m9 t1 i6 K3 A ]+ Y0 L# X0 U) d& ^7 ]
end$ Z% e# @% T# ~, }
to do-plots
5 J& q/ i7 n! {& p' P set-current-plot "Totals"; N6 ^# |2 D4 c: c
set-current-plot-pen "turtles"
/ D# ^% n4 r: R$ o plot count turtles
o3 l) ?& a- t/ [7 I set-current-plot-pen "grass"
0 @) D, h' y& c2 ~" U5 ^( C1 P plot count patches with [pcolor = green]5 j6 V) C3 q0 t. i' O" T& a5 z
end
' F2 O* K# l1 J$ V可是运行时提示no such plot: "Totals"" n9 N L6 g7 X( C: Z- C( y
error while observer running SET-CURRENT-PLOT1 L b+ d2 a6 g' R- H/ ?& |
called by procedure DO-PLOTS
8 o) X1 U6 c) P6 i. o+ y0 o- i/ b) n called by procedure SETUP
$ ^1 ?: u& W4 P/ Z# d called by 按钮 'setup'
8 N& }! J! H0 P求大神解答啊 |