我编的程序如下turtles-own [energy]9 ^7 Z6 U$ l$ d6 r$ j$ B! y
to setup
! \0 v# U' J2 ?6 S: K4 `* J: s clear-all2 `3 c; s* @% X! H7 J2 t; T( ~
setup-patches5 n2 h" j/ i4 b0 u7 k3 M
create-turtles 100+ F! n4 b0 }3 d
do-plots: q) s% a8 C: ]2 b8 r
ask turtles [ setxy random-xcor random-ycor ]
7 D7 w9 L' { Z$ send* E( V8 ?; g6 p" D K
to go
" Z. z# j% R! z, b0 j move-turtles
2 L/ {$ B9 j7 r eat-grass
* { G) r9 Y \4 Q$ j reproduce
5 n, R7 k7 J& y; d! X check-death
1 t7 x$ h- @& J: W2 V( n regrow-grass! e/ S" y3 A; s n
do-plots
+ w b' z' a5 f/ G9 L) [end7 u C1 H5 p' v
to move-turtles
* z4 C8 i# B' S4 t3 L ask turtles [. [# b; `7 S$ A
right random 360! w6 T/ @( T; _. R# D% \6 k
forward 1
( d" @5 X8 n6 d4 p3 t set energy energy - 1
, [1 A7 J4 T% @' L+ _! ]- k4 V ] E6 z0 T, Y# `4 n1 i
end, e) \; o: W i4 n4 l
to setup-patches1 T" k, h2 C0 a) Z8 S3 r6 Q% P$ c
ask patches [ set pcolor green ]" g' I; ?7 c! r9 y, w, u5 i, R
end
3 D; [3 q4 b) q4 R, r0 eto setup-turtles% O1 z) |- E0 c3 i. W. q
create-turtles 100
! }; x# Q4 K! J3 |# w$ R ask turtles [ setxy random-xcor random-ycor ]4 n3 K6 _) v9 S/ u
end
4 q1 j" e% e4 M, l( |5 W, Mto eat-grass g, \- K5 y7 {. s. ^1 D# a: F
ask turtles [! H' w* [- f$ ~* C
if pcolor = green [
7 Y: I$ {6 ?- _# [ set pcolor black) ?+ {7 ~$ v# r2 e+ g
set energy (energy + 10)5 o/ `4 {6 y7 u4 f/ n' o ]5 ]
]
2 o4 ]+ o6 `8 t7 P4 W ifelse show-energy?8 q; y/ v, [: o) J* @/ {
[ set label energy ]6 {- M& H9 N7 i# ~# _$ h7 p
[ set label "" ]; P5 g' h3 f2 x" Z' W& n: [
]
8 E8 x+ D7 d. q, E5 P" b: Eend
. p; w$ h: b2 `# N" dto reproduce
6 w+ H. g$ H2 o$ A, S/ n, W ask turtles [
6 O/ d$ I4 G P% J" \; @ if energy > 50 [
- W; e; `& m# X. v" G$ o7 e, M set energy energy - 50
; u- L4 P' d8 d. I' p8 I' g hatch 1 [ set energy 50 ]
, z' J3 `! T* S9 h$ I ]) w. _. n; @. |8 d ?6 f) K3 F
]+ m, W" ^9 K e& \
end
" Y2 ^4 C; l, b# H: G9 x: a; D4 |to check-death
7 @! D& [7 Y/ }6 d' x: \4 f7 Q5 T; g: E ask turtles [
; E6 m3 \7 b" ^ x, h8 y# y if energy <= 0 [ die ]
. t' d- X. F: t# T, @* J! h/ w6 _+ Z ]
3 D! s6 A: A% G/ u* Vend
3 `# c- G; a! A# q) P" F* @( ]2 Ito regrow-grass
, ]& G# q& g! q0 v ask patches [
$ j+ j/ P( @7 B8 g! E if random 100 < 3 [ set pcolor green ]& k7 k% ~* C- } a3 q/ _$ E2 s5 [% c3 z
]$ H# s( {. H8 ^
end
# \' {5 v, h' C) F4 o/ L: Pto do-plots
, S. t8 t* s! e- d- L' n set-current-plot "Totals"
1 W( O$ ^" c) z" |8 n/ f set-current-plot-pen "turtles"
7 \: v+ ]! ~2 c: A( [5 z plot count turtles% w. P/ s* |9 W) `
set-current-plot-pen "grass"
7 P5 K l& G( F+ Y( a; \6 K plot count patches with [pcolor = green]
" Z7 |/ n* m4 o+ Q Iend5 X6 X5 H5 G8 C' h- L0 @7 Q
可是运行时提示no such plot: "Totals"
4 M5 I8 p9 t9 terror while observer running SET-CURRENT-PLOT
' j/ X$ b, @: ]- S called by procedure DO-PLOTS3 m- U* ^2 k4 f/ P
called by procedure SETUP
6 m8 _2 v; X3 F) y b( X/ r* K called by 按钮 'setup'4 y& e, V' ^* e
求大神解答啊 |