我编的程序如下turtles-own [energy]
; ], @$ G' M; k' s3 ^to setup7 }6 R4 N; W, v) B6 c
clear-all# e; I1 W# v, D6 d0 K0 ~) E( H; h
setup-patches
% g% o8 C% \$ ^ create-turtles 100
8 v( K) Q9 b, l. Y% H; e# o do-plots
0 M- Q9 Q" Z( s! l3 t ask turtles [ setxy random-xcor random-ycor ]+ d# y+ [3 v) R
end. Z" J$ U. x. O$ v1 @
to go! u0 H# f! F s, U
move-turtles
& V' w0 K+ m9 J6 i+ _ eat-grass3 D1 \6 i+ H# n, U6 q6 ?: d4 I2 ]
reproduce, p8 G' j! b5 c E6 J
check-death
9 |0 F4 B9 n/ B- P! N. D" `' A3 ^3 @ regrow-grass
' `. I+ [; V+ p) n# N4 @, d$ y do-plots; h" ^! H1 c ]9 B1 T% \
end
5 J* s$ i1 m3 w7 D$ ?( l( w$ uto move-turtles/ ^/ j1 M e+ ~
ask turtles [
F# n# C0 U( v* R/ `3 J right random 360
4 F h: @% f+ x/ p forward 1
+ s' p% c: A$ T: \. j% R( G set energy energy - 1, s: d% {1 s1 u7 |
]6 F; `" }. }0 a/ E7 j
end w+ m- e- W9 G6 w* b
to setup-patches
: `; e5 H( B2 J) x4 O ask patches [ set pcolor green ]
9 g, c: T* w: X, _9 J3 Send% H1 V8 ?5 p! {: `& j( @6 F
to setup-turtles
3 a7 W& X* f3 B3 T7 ~* P/ g create-turtles 100
0 P* E8 w/ i' f2 ^$ ^( D ask turtles [ setxy random-xcor random-ycor ]
' ^+ p1 c* ]% o* ]; i8 r( mend
! a$ t1 X ~; ^+ t' ]/ G" nto eat-grass. g, {+ E6 {* f: ^. \8 M
ask turtles [
0 Z' e2 G F( {6 m if pcolor = green [
( J; V3 }4 H) {" ` set pcolor black" d% b) _+ ^* ^2 v: R, _
set energy (energy + 10)
/ g; ?9 e+ t5 f3 r& r ]: n8 Y- a/ v! G( `
ifelse show-energy?7 y7 J/ m: T6 u" i( }( y
[ set label energy ]
) ^" l9 w. ]+ T) U9 }* ? [ set label "" ]" ]# R; f7 ?2 u0 t, X+ l! g6 o
]/ i. j4 P/ U ?$ B# L
end
* G( Q7 p3 a2 ]/ j! G$ V* pto reproduce" l4 Q- W; ^7 V; [+ G
ask turtles [. j2 e8 W3 m: n6 T
if energy > 50 [
/ I6 R d$ U7 R' p3 G) N set energy energy - 50
' w8 b2 e6 T0 n6 }$ I hatch 1 [ set energy 50 ]
! L' `! q5 \; s/ ~+ L ]
( O3 d" n p0 n" [0 g) y9 F' i ]
t- s* {3 x( b& n5 g6 Mend
: ?! f7 a1 }2 ]/ E- G0 X( ?+ uto check-death( [- ^: Q6 B# Z+ M5 I7 K
ask turtles [! ?8 g% D, j' s5 B j
if energy <= 0 [ die ]
8 d/ u. s/ a4 w7 Y( O& @6 u. l ]
9 Y, a$ {" e* \9 k. Aend
: b6 D; E& x+ a4 P1 B) J2 gto regrow-grass& f7 R: T u% v9 G$ R5 T
ask patches [$ I F1 {' l9 k6 A4 q- d
if random 100 < 3 [ set pcolor green ]# O/ t+ z9 v1 f) O5 {
]
0 |8 [4 C) B) `/ aend
+ j* a7 p2 j8 [3 v) P) Q) Fto do-plots5 S) h o' `% [- z& G' J6 x/ I
set-current-plot "Totals"
; E7 d, E- |0 U) n. o w set-current-plot-pen "turtles"
0 b) h4 s) d% T8 | plot count turtles
. R0 ^0 `& X8 [5 M. E+ h) { set-current-plot-pen "grass"
: _/ T. f) Q4 r, [( [ plot count patches with [pcolor = green]: d- D$ H. n+ J2 u- h8 \
end1 e1 m( j+ t; u
可是运行时提示no such plot: "Totals"
1 I3 X' S1 G. Q2 m4 ~2 M* `error while observer running SET-CURRENT-PLOT3 q9 ]3 O ]" d% J
called by procedure DO-PLOTS& M7 H1 `9 H, v4 h( `
called by procedure SETUP
6 w/ D+ B, N, W# o, T4 [ called by 按钮 'setup'
. G0 ?6 A! {/ ?3 o求大神解答啊 |