我编的程序如下turtles-own [energy]
2 Z3 J! z }) T6 y6 ]to setup- z1 B( F c) B) b3 B
clear-all
( v; T8 A; @. g g' K' {% ~ setup-patches
& B, U& e0 {. i7 x create-turtles 100$ O2 B u9 w; R6 T& o n$ h* }) [
do-plots6 l4 v+ |- R$ ]& Z7 T
ask turtles [ setxy random-xcor random-ycor ]
& S$ z' g N7 T0 _end. a1 D: z4 m8 T: M% f6 S* e4 k& r
to go9 i" n1 b5 m0 C# |+ o4 l, V
move-turtles" s; y r+ Q/ t6 W, N- s
eat-grass% R8 K- e8 d# A6 c1 a
reproduce) q: b4 |% `, R2 i7 k% H
check-death
" S# \( o, C) @( C8 B% B8 [% o regrow-grass" W7 |6 H5 X# s+ W& U: D
do-plots
4 ^8 C& H/ q$ Gend
6 l9 H$ L8 }& x1 dto move-turtles! z# X/ j) B* V' ?, F
ask turtles [5 t9 @8 c4 ^" b) F# B% J
right random 360- c3 h( l( g& d+ c' \6 x* ~0 v
forward 1, i, M0 h2 @3 ^
set energy energy - 1
0 G4 y, U6 c0 T ]
- U# Z: K/ X( Y# v/ \- f! J5 `4 Aend
: D8 f8 @7 L: T1 b/ Zto setup-patches( a: h& {+ M6 U! I
ask patches [ set pcolor green ]
0 `4 M3 D5 b' \end
; C- k+ K: o6 |2 sto setup-turtles
3 t, C6 o( D( V' x/ a. f create-turtles 100
( [/ v# d' O, t3 C ask turtles [ setxy random-xcor random-ycor ]
, G. p& H) r. P% ~$ Uend
* b! T3 V% [" \$ H3 m/ r( R8 G# Gto eat-grass t: B: Z! x3 g4 Y2 a( t+ B
ask turtles [2 T* B- a' z! _- q9 J Z' P
if pcolor = green [. s$ K, \$ F% f1 {. G) H0 f z5 |
set pcolor black. b! o: x3 e; C- J+ l1 h
set energy (energy + 10)1 e% v r1 S( y' n* N+ V& d( W
]
. ^1 T0 o G( h: _/ z- |6 E ifelse show-energy?( I# W' u$ ]) F R0 z' G
[ set label energy ]
' {$ E& P/ y. n' ^ e [ set label "" ] Y. M: K: N q3 k" \+ M: o
]
! i7 x! \4 y4 v' B7 h" y! }8 Xend, l. R$ K5 f0 S' o' r9 E
to reproduce
/ U/ W- L$ q% [: H+ L" ~ ask turtles [2 V0 a# Y" v z1 \1 [1 {' R& ~
if energy > 50 [
$ R3 @. n% B+ \+ R8 G7 _ set energy energy - 50# d( p2 C6 ^, t9 Q4 s$ m
hatch 1 [ set energy 50 ]
& r, b( C1 p8 t6 ~0 L9 c. {; n ]
5 r& B7 g/ z6 I0 W+ V; Z! P" M- L ]/ R$ h& E E: q/ D4 Z1 _
end; m+ I0 ^: H! u. c
to check-death
6 E1 }, S4 F( Q ask turtles [
$ t( e' \9 t; [; A if energy <= 0 [ die ]
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end4 @- D8 E* n% |, Z# ]
to regrow-grass8 q0 D5 f) f& O2 ]& e0 M
ask patches [
" N4 T: ]2 u3 z/ w' K. m if random 100 < 3 [ set pcolor green ]5 H: c& T1 S) O: S
]
1 h: O) i4 U" L$ f6 d, G7 Yend
2 z( I. p z4 a8 X+ k* sto do-plots3 y8 n* R% E& i: p
set-current-plot "Totals"' M9 R' B% w+ e5 a6 x
set-current-plot-pen "turtles"
; |% s: z) `6 ^ plot count turtles
6 l+ e! D7 P/ H0 i% s set-current-plot-pen "grass"
0 L/ e- V" ?& F$ r9 U: D plot count patches with [pcolor = green]* w* t/ b6 _# S; c, f# U8 r( H% @
end' e M0 V$ g7 W. t* p/ m( w
可是运行时提示no such plot: "Totals"0 v* Q4 G+ b$ g$ n6 ~9 A; Z2 ?4 P2 u
error while observer running SET-CURRENT-PLOT
0 }" E0 a# N) M7 D$ @! H$ Z8 ] called by procedure DO-PLOTS
* A' j: y9 z- P1 l% s9 X called by procedure SETUP
2 ?: e% Z; r8 M called by 按钮 'setup'
" E( [7 S5 w9 g p5 z求大神解答啊 |