我编的程序如下turtles-own [energy]: K" c. ^; W6 K4 C/ L! }4 c) }6 X
to setup7 ]/ d3 T4 x5 [/ c. M5 O0 X2 V" [( b) i6 k
clear-all
$ K. C2 Z9 T. U4 l/ k2 m setup-patches
/ u9 P' X$ a8 f1 r G( L create-turtles 100# ~( |% C) P* K' G+ X* x5 b
do-plots
; s! F# k8 Y* o6 H1 p5 {. w ask turtles [ setxy random-xcor random-ycor ]& X" t# ?. p% C; D& j6 i
end9 l1 H4 W0 Z, @, |. r; n1 | ^
to go1 U4 h# K* J& l' i ]
move-turtles
! \" R) `# ]7 V& ^' l4 j7 @ eat-grass# e% V G7 E8 z0 m m
reproduce$ b. C" P+ ]# x# B$ }' q) g
check-death
; q1 ]! ~0 D/ M3 ^3 ?: w ^ regrow-grass1 ~. d% a! M0 E! c
do-plots) W* v/ S: M0 T I6 {
end& n. G( q2 e2 l3 R( \3 l
to move-turtles/ F) V. Y, W$ K) \: z3 v' k
ask turtles [
. k( `7 x0 x. u" [0 P right random 360) `% i' ?" ]0 B
forward 1
1 S7 ]+ T0 ` C% E set energy energy - 1
: q& Q7 ^. \8 S: M7 G6 w ]
! q! |# t7 U# Pend. h0 t) i+ G9 ]( |7 M
to setup-patches4 e. `# y. ?' A* T( a
ask patches [ set pcolor green ]( g7 q4 y( ~2 x1 |" m+ e
end3 O6 P5 c( \$ E/ a4 Z" C# S# s
to setup-turtles
7 p8 V: d* F+ M& f, h4 o create-turtles 100
' M. x. V) k* Y) i7 L ask turtles [ setxy random-xcor random-ycor ]3 X% e* j( H+ \& }
end% b5 Y! P) D1 X) L& B/ E
to eat-grass1 A8 g6 ^2 K8 c. B
ask turtles [
$ r% Z' ?7 f' U+ M; R7 e1 @ if pcolor = green [
- q* s; S$ J( V! j set pcolor black9 X! E3 }/ G* _8 e8 ?- D8 I
set energy (energy + 10)
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ifelse show-energy?
! O' l! r6 d1 E) V1 t2 ]. G [ set label energy ]
5 L: U7 Q+ Z* F [ set label "" ]
# F* m+ K0 h. \4 i ]5 U* j5 h$ t3 d3 C4 A5 M
end
4 ~- [" R: I X4 o( x& Z" Q1 kto reproduce4 y# R4 ]0 Z9 N5 }" A0 q0 @: {
ask turtles [
" c7 z5 u8 \( {5 v if energy > 50 [4 }0 o/ T+ Q) y
set energy energy - 50
- C. I' R+ o* y2 T# a% ^ hatch 1 [ set energy 50 ]
) R5 i# S+ N7 z0 p5 A' x ]
: P2 q0 @ l8 C1 ]6 o) u. O) R ]/ v: g0 x( p6 C% v1 @9 K* o* P
end
) Q( C3 ]( i2 l- |) f+ p1 g, z1 eto check-death+ G3 _( L% Y6 |! W
ask turtles [% x- n9 X/ [: ]- z2 K
if energy <= 0 [ die ]
* S3 z0 t2 v+ Y! M ]
3 K, R* A9 T0 J; j+ m- Iend
& `8 |8 d1 o& `& M+ cto regrow-grass
, M' n8 A# |+ G1 `0 K4 I- i9 N- W- C ask patches [* q. |$ U0 e( ]% f9 j- s0 S/ |- i: V
if random 100 < 3 [ set pcolor green ]
) P3 P1 B! A. x8 m7 `* g; \ ]
V8 u6 }+ A; Cend
. x) q+ a/ j0 l9 rto do-plots
5 ^& _/ \: g) `# z/ J set-current-plot "Totals"+ c/ I$ o/ p# o. W
set-current-plot-pen "turtles"/ z. P3 O2 ]9 G6 m8 O
plot count turtles
) |$ d8 l z7 R. y- L% y3 r7 S set-current-plot-pen "grass"
6 e5 o2 v/ v G2 a6 g( L$ o plot count patches with [pcolor = green]0 x( V' c9 e( `- m
end
8 J3 r% L: [7 s6 @" y9 ~" Z# i: c可是运行时提示no such plot: "Totals"
( G9 N" i( w9 Y# ]6 serror while observer running SET-CURRENT-PLOT) f( {! b: M( _2 \2 ~% F1 U8 H
called by procedure DO-PLOTS' n# Q* s; s: {0 S: |5 n5 J
called by procedure SETUP
; [0 a( }) g5 a1 c0 U) S& f called by 按钮 'setup' W* k6 j. F& F% F/ a
求大神解答啊 |