我编的程序如下turtles-own [energy]) W9 U4 d- ?- W3 W6 v7 |
to setup
8 i0 s5 u7 ?$ ]+ o. Q+ f/ W: _ clear-all
! F. V7 d( W$ r! E0 L setup-patches
. L5 [. E5 x3 [$ e9 u- A' M" V- z create-turtles 100 j% ]1 Z+ T5 R! \+ h% E0 f
do-plots
; N& s# }7 K$ Y, ^0 Y ask turtles [ setxy random-xcor random-ycor ]* c8 y7 r# Z& }' X/ b
end0 b _' j; Q1 r* e
to go
4 G) ]) Y7 g9 y) {7 d) n+ v1 N# z( C move-turtles6 [3 f! [0 u5 d. _8 s( g9 h
eat-grass
" J# B$ M* o# J# s/ P$ ^# t reproduce' e) Q5 @( h6 W) c v
check-death; O/ |+ c1 y3 |. L! Y
regrow-grass1 E% p7 W9 f- l' I% Y
do-plots
7 _, L$ I/ L6 t& Hend
) E$ ^! P3 \" B0 I& }# V hto move-turtles
" J0 ~6 e7 f) s ask turtles [
7 [5 O4 @/ k$ b' J4 T0 O; I right random 3602 ]" V) Q% ~- L. [- T: {6 ~
forward 11 j- a: F/ `6 o5 }- s
set energy energy - 19 I9 k' ?; o [7 l, Q
]% J9 V, @6 ^% h5 J. A9 i) \ @
end: C, p# { \) [; V* b, e
to setup-patches
& O0 Y. `( w) }$ P& n ask patches [ set pcolor green ]" A, B% @5 Q! p
end# d: I4 d* h" x! U
to setup-turtles
4 Y/ |0 f9 V. v7 a$ k/ [ create-turtles 1009 R9 X# ^. U9 M5 |. l) B
ask turtles [ setxy random-xcor random-ycor ]8 E/ f4 c4 s1 _6 m# Y9 G `
end. t( O5 B. k7 l. `
to eat-grass
: m" i9 [6 h7 `- A. T2 Z ask turtles [
9 z) Q! i. B' \+ e if pcolor = green [
) J8 ~/ @' ] ~+ M5 n& ^. q set pcolor black( u0 R- z6 s) W! [+ ]9 i
set energy (energy + 10)& h/ D2 k# x8 q$ `# y* ]& v/ c
]
; N* L* K% y* u) } ifelse show-energy?
5 a6 @' }* M& r [ set label energy ]
I# p& M& o! n6 G6 c4 B [ set label "" ]! W& b& h4 Q5 ?) U
]
' M( w& n5 Q( M* send
8 F" F: q1 R3 Y( @1 O$ \1 Gto reproduce7 z! ?5 U: D) A4 ?; |/ M
ask turtles [. R# w% P- F& j3 c
if energy > 50 [/ S) g- D4 ?/ d+ K/ ]' p
set energy energy - 50
% Q2 m" M% Q: U7 [! O1 U- ^ hatch 1 [ set energy 50 ]
% y" H" Q% J2 Q; `9 E9 C ]
$ }$ k+ Z0 X9 Y' {9 w ]
2 d0 F8 c( s E$ kend) S8 ^$ a; {2 u) ~" p2 ?7 S* l
to check-death
* ~, Y- B* ^4 W ask turtles [
" a4 {+ f8 Y, I, h2 w- d! J! s* Y if energy <= 0 [ die ]! O, I3 t2 |4 i( J; B. _" k
]
" V& [7 i8 d* @6 aend: c0 [& F6 K; e+ W4 Z$ P
to regrow-grass
; r x# a% v) X* q" B ask patches [
% N$ I, o4 F* o1 C! U if random 100 < 3 [ set pcolor green ]- k" {' Y: H. q6 Q) ^* i! V
]
. m! M+ d1 k/ E$ ~/ W- X( Q6 t" jend6 c6 ~4 V' ~7 S' F, n8 s# g8 _
to do-plots0 m0 d9 U/ {/ U
set-current-plot "Totals"
7 ^. R9 z5 j/ g" V' k7 T set-current-plot-pen "turtles"
/ R$ _1 g. g# M9 b: d+ n3 e plot count turtles
. P& j- W, C/ |% f4 J; G5 R set-current-plot-pen "grass"7 z6 h @9 s! V! X
plot count patches with [pcolor = green]7 [2 v% B& z% o9 {( Q* [" F! J
end6 P/ P2 [- u& f* q* n a' x( g" L
可是运行时提示no such plot: "Totals"
0 v) y8 w9 z7 h8 serror while observer running SET-CURRENT-PLOT$ |- a& z7 K5 z9 Y! b
called by procedure DO-PLOTS% S% a% R4 i4 k0 N7 N" R) O
called by procedure SETUP/ b: X1 F) `! `
called by 按钮 'setup'
# a9 c' _" h; o5 k5 D+ k: L求大神解答啊 |