我编的程序如下turtles-own [energy]
$ c8 T7 u) a. m3 X3 t6 Eto setup
9 ~' S1 [8 M9 ~% u clear-all$ E3 q2 K9 I' W" R7 S: }
setup-patches
* v7 w* H) B2 n create-turtles 100! j) U f0 r. l/ w1 T( g9 A; [
do-plots
* A w K* r0 P b/ A: N9 W ask turtles [ setxy random-xcor random-ycor ]
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to go; _. I/ T6 j# }- Z+ l8 V
move-turtles
- ] G6 l5 w7 _+ N3 k eat-grass
$ Q3 k% i5 h, y2 X6 J reproduce
' w% W8 L, I, d- Q% i check-death
+ L" @4 f B% s3 O0 j3 X3 v regrow-grass
( }% L8 Z6 f& ?6 ?( G. g- m do-plots
. i. I# `$ J+ Oend
: X C+ F$ D' Yto move-turtles3 c! {4 ]) P* p% l
ask turtles [
$ O3 E# |8 q$ J$ @. E! l: ~ right random 360* E9 }8 U+ U7 B3 R2 ?; ^ ]) B
forward 1# J4 c$ o1 V+ S- M- v. i8 A+ A
set energy energy - 10 [- I6 v3 W5 l9 |3 h" @
]
0 J0 o1 V+ J( X9 ~1 send- K- M( A3 n7 B8 F
to setup-patches+ i0 ?& Z, c8 [5 H0 q, L/ o
ask patches [ set pcolor green ]* }$ m' _4 Q3 E$ {' z4 o
end4 E( s. y# w3 y% W! u
to setup-turtles1 i+ t" U! `" U/ P* K0 @$ ~
create-turtles 100
. A/ j( N2 v0 b- d ask turtles [ setxy random-xcor random-ycor ]
: C- W3 u/ B% t. G& j D, x6 |' m. rend
X& [1 V8 I, |4 ~to eat-grass% x1 H: m4 `+ p" k3 H. {9 X6 ?( {
ask turtles [; Y6 I/ J& H# x. ?: ^% g/ r
if pcolor = green [
6 _0 C/ r8 |0 @ set pcolor black
" K* U8 V" x8 \4 c: O! b set energy (energy + 10); H3 l% a+ G; N. |" G; |/ q$ ]/ q
]! {* x+ \1 Z8 [, t/ O) H
ifelse show-energy?
. H3 Z7 |6 l M Z( @3 T$ K [ set label energy ]! J6 H3 _5 Y4 i+ [% M
[ set label "" ]
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8 u. o3 y1 m. C, k zend
# a4 P; z; b7 h5 S4 c" V- Pto reproduce
+ I; f6 c" g! g ask turtles [
3 m5 e1 \5 W( Y4 X# c& ^- e" A: s if energy > 50 [# p0 v3 b) y; y2 t+ e# W
set energy energy - 503 M4 ]* B. A5 P" ~/ l
hatch 1 [ set energy 50 ]
4 p6 z; }% C ]- v# ?4 Y0 m ]
2 K9 V! f+ r! l6 ^2 F$ i1 p! V ]# L; g) n/ q2 {- L* B
end
9 h+ i5 O: m; j& G+ y/ L( Nto check-death
8 ~3 U' n' D7 T9 I6 k ask turtles [
5 \/ ?& e6 E: @; H" ~ if energy <= 0 [ die ]) q0 m7 I- t) F; I$ `8 t8 t
]- m$ v A! P) q! M0 b4 k* @
end
# b0 q1 z" {6 @( l2 E9 A4 lto regrow-grass
" S- F: O" f* s$ { ask patches [
, k$ h7 M% ^! i$ _% S$ ^ if random 100 < 3 [ set pcolor green ]
( b' L% Q: u; T$ v# ?/ r ]4 C5 w9 W, P [. O' f
end1 j K8 L( E6 n0 V
to do-plots9 ~# z' c# Y% y' V$ t
set-current-plot "Totals"3 `& C& h9 I3 X7 m3 p
set-current-plot-pen "turtles"
+ M _* c+ Y. F- ] plot count turtles* u6 D& q* J( K: Z( E
set-current-plot-pen "grass"
M9 P) e! _+ ?9 T- \ plot count patches with [pcolor = green]
; f" \% n& S) j; h2 xend
. X( s! b( Z* y1 [% w可是运行时提示no such plot: "Totals"* O, E6 r# |+ ?( S
error while observer running SET-CURRENT-PLOT3 E2 j4 Y, Y1 s# L( a1 ]
called by procedure DO-PLOTS
/ S# W6 ~, y4 V+ `/ a called by procedure SETUP; y, ]: P. o- h3 I! s( M( X6 F
called by 按钮 'setup'+ F5 r9 f' V9 w# q r; V: s
求大神解答啊 |