我编的程序如下turtles-own [energy]
+ S& c3 ]2 W. |6 T4 Y$ u& Jto setup$ v7 i5 z9 m# m- Q1 D. |! X! S
clear-all1 L1 D. J# c2 Z' c
setup-patches& D; J( J, j; j6 {; F, w0 C9 Y" |
create-turtles 100! x& Z1 P! l7 _& |
do-plots+ ] e4 ]$ B4 E+ F, f1 `. n# S
ask turtles [ setxy random-xcor random-ycor ]/ w4 Y2 \( P) }+ ^! r& D
end5 w% S" x% n; a8 w/ Z
to go
* A5 ~; J- N& |* d& u move-turtles4 }/ R4 z" v( p
eat-grass1 P( t) |9 T# `4 w+ g! n* A: l
reproduce! M( p8 Z7 H- Z+ h
check-death
" x4 T0 \ e# P3 r% c regrow-grass
?, n; b X( `; t5 ?- w2 Z* N do-plots. R9 y: H5 U0 K4 R- p z% A
end
& k/ j- W3 D0 k$ W8 l- Lto move-turtles2 w) q9 u% _! c
ask turtles [
) K- d+ e: k1 s6 C% M right random 360+ D2 h) ^, _% W2 g0 H3 O
forward 1
( v( o8 ?2 e. {9 n1 W" N5 t set energy energy - 1
* {+ a1 I) L* ]7 _) d8 Q ]
1 e# ?) G+ ]) M- F0 gend
5 K7 N: a5 _2 L ~9 l- kto setup-patches
2 r' ]& a! b" }+ H- V ask patches [ set pcolor green ]' f" k, ~" B. `6 N
end
6 @2 M5 M# P* D' S' nto setup-turtles4 X D# d% u, B% f T6 P
create-turtles 100
$ {( q7 f$ W0 i0 `; `* q ask turtles [ setxy random-xcor random-ycor ]
, ~3 g) x: I6 ?. ~end
- D8 Q/ x& ~, q8 S& t. u# i: b. Bto eat-grass
- j' f% X7 B# j& J4 s7 x ask turtles [
* `, W M# L- F8 z if pcolor = green [ b' x2 f3 \4 O9 D/ X: d
set pcolor black" d8 E+ T. q7 |+ ~8 Q% \" t1 Y/ k
set energy (energy + 10)
6 E; D# v4 Y, a3 l9 Y& j ]
" g# Q1 G8 ], W' P4 F. j% S7 N- [ ifelse show-energy?/ x/ C% e _- ^; j0 f0 U
[ set label energy ]# y0 r4 X# `# t% s" X" U
[ set label "" ]
5 |; h5 y/ d, d* W ]
! B, W, `& z0 n# c: Aend
$ N4 x( o% s( i+ D, r2 V3 S! Zto reproduce" g$ G* k& e' @* F% z) ~" I d
ask turtles [
4 S# @9 S- m m6 u if energy > 50 [
6 d. R5 z% `" ? set energy energy - 50
% |9 G6 e6 V; r3 X8 H: q) b# M hatch 1 [ set energy 50 ]1 h' j5 e, S. o5 y
]) Z; A$ | T* d4 d8 X6 S
]5 {& D( m1 ~: i( o
end/ @0 {3 d" M6 i
to check-death7 n# ?, D% Y9 n8 J6 ]. I O* |
ask turtles [* O" \) Y7 b* ~
if energy <= 0 [ die ]# f% S5 d+ V) w4 E0 c3 m q5 {+ q
]
0 ^% W3 V5 b7 X* xend: {( f2 H% E5 }8 f0 Y2 E- y( d
to regrow-grass
' ?/ Q2 e0 v' k+ M; b# L7 i' ~ ask patches [
6 @3 F. s( M/ _" A6 E if random 100 < 3 [ set pcolor green ]
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0 I/ f" e4 }) S2 m% |0 ^end
" J+ D% V6 Z) t$ X6 | W0 G' ^to do-plots b3 R( ^7 d, {( q
set-current-plot "Totals"
! U: u' C- z2 b% \9 o set-current-plot-pen "turtles"
' u/ j* Y2 y) ]/ w plot count turtles
9 z. n1 l' t* c3 t! `6 H5 w, D! N8 J set-current-plot-pen "grass"" S: ?/ H6 K$ |" m# }
plot count patches with [pcolor = green] G1 N1 b# G" o- F* Z9 P+ i
end
# @ `6 J; ^3 D9 v1 e可是运行时提示no such plot: "Totals"
# Z+ c0 ]' X" Derror while observer running SET-CURRENT-PLOT( \9 n! y# k: B+ r% {% ~/ l
called by procedure DO-PLOTS9 }0 z9 J( z& _/ E' a0 A+ I/ J8 w
called by procedure SETUP
- W, y# ^& O* C$ w7 Q% N4 d8 b called by 按钮 'setup'
) L3 V( W' R; O求大神解答啊 |