我编的程序如下turtles-own [energy]
" B! s! @( A- ]6 C* fto setup
6 n3 i* G+ u7 f7 L0 N clear-all
, a' P" [$ G9 H: p; O: N1 [# o setup-patches
: U* k' y& x/ S create-turtles 100) M, j: x7 {- E; J4 ]
do-plots. Z- ], R: L; W! _
ask turtles [ setxy random-xcor random-ycor ]
. |7 _& |; K+ p6 cend
6 H% I! z5 T* ~7 i' p: kto go
4 E# E2 D1 s! K/ p4 b& j move-turtles
; W; ]7 T; \6 x" \: n eat-grass
7 ]7 o" L3 ]5 R3 Z4 H+ z/ A reproduce
) `% s; r. ]* I$ t+ M# H" r9 Q; i check-death# t8 h m9 y9 x1 v/ a( z# o
regrow-grass
6 ~6 m! t2 R3 s do-plots
. h& A/ _6 ^; l3 Hend
+ u3 y: M2 y# s/ b. v* jto move-turtles
( F5 i- O, g! G w8 I" q ]3 p$ M9 B& @ ask turtles [
6 q2 h8 O+ k s9 P$ ^* t9 I right random 360
, D0 @. }5 O( | d forward 1) d# ^9 H$ S" t, V! s( Z
set energy energy - 1
/ c! G$ z; g9 i1 Y* q ]
. l/ G c- G5 d9 P$ `# E$ Aend
) `' n: g; _# \; \1 t# b# G! ito setup-patches
, [/ c- l2 z6 N/ u9 g! V: ]+ d ask patches [ set pcolor green ]
6 C* I+ u4 q+ oend
2 }$ U! k; G" {$ k7 C$ M- Ito setup-turtles. T- u$ S: O8 t4 V; x5 f
create-turtles 1005 H: h: h9 T- V) a% z, Q# D
ask turtles [ setxy random-xcor random-ycor ]/ ]# [0 s- i% R$ j
end e6 H& I: l# o, V
to eat-grass2 g d/ d4 Q- M2 F& U& {4 H. C
ask turtles [
9 V, d" v- \& t0 l+ P if pcolor = green [& i0 d7 U5 L/ j
set pcolor black: R" u2 k0 g4 Z2 k
set energy (energy + 10)
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ifelse show-energy?" Q* O( o8 V0 ?6 p& m9 C3 d7 d2 x
[ set label energy ]
7 b0 H* f6 |4 y2 N" ]- N+ W/ t [ set label "" ]. q; R f6 z/ |% F0 A1 T
]: k u6 f r- ~2 E( m& E
end
9 \ a, P0 H' A5 g# _! Bto reproduce
; d3 y! |4 K' E" r) ~ b7 { ask turtles [/ j+ A/ ~3 N) ^+ G: \( W$ T$ [
if energy > 50 [8 m; o2 d" ?% e0 c
set energy energy - 50, d+ y) z9 T& F1 ]( n! t' i3 L
hatch 1 [ set energy 50 ]* o1 ^7 o+ I+ O; j
]
g0 D; O8 e6 p, {/ s# n ]2 P3 j5 v9 [# c: q' K( D) m
end
% X* R& e- U) O- W; c7 ?: J* T$ }5 L, Kto check-death) u. E) q+ c8 u- e# S
ask turtles [
- l: N8 N! l @ t: y if energy <= 0 [ die ] q) w; y! k, a
]
9 [; g0 }) X6 ^$ gend
A0 p: f7 x; T+ jto regrow-grass: E, U% M8 H) ]2 ~1 m5 j
ask patches [
, |# i# k# L# H: Q if random 100 < 3 [ set pcolor green ]
) _) Z6 k0 H7 n+ k5 e5 r8 E* K ]! H m; |1 O& @/ u6 x, \0 o: I
end3 A1 g: X y1 Y! g, d
to do-plots
1 _" P( S. V9 G' x set-current-plot "Totals": s6 j# T* h6 q1 E1 @3 q
set-current-plot-pen "turtles"2 Y4 F8 h/ q# x- K7 ?
plot count turtles
& J5 x2 [ F$ u$ X6 W8 p set-current-plot-pen "grass"5 |8 t2 t4 S, C+ q/ L* u* Q
plot count patches with [pcolor = green]
) O7 S- X% t" V7 H6 Q. j9 `end, U i; d8 G7 _+ }" P
可是运行时提示no such plot: "Totals"
: R( E* X. M8 t" N7 g" @7 |error while observer running SET-CURRENT-PLOT7 q- k9 F& J1 R) y9 K3 C
called by procedure DO-PLOTS
3 I7 Y Y$ T" @- a: I called by procedure SETUP* {' g' y1 P: E3 f$ a% I
called by 按钮 'setup'
6 b; e3 s1 K! \0 Z2 v. t/ K求大神解答啊 |