我编的程序如下turtles-own [energy]. f8 L. F% J7 u, d
to setup
' ?0 ^3 N/ _! [) K# H; |# B. U8 ?" Q clear-all, g) V e2 [ ]5 s O
setup-patches
/ I. C/ A+ F% [- ~ create-turtles 100$ S1 h/ S7 P' Q$ P( L8 q( t
do-plots
! L6 Z" }4 V! b/ a( G ask turtles [ setxy random-xcor random-ycor ]2 ?0 N0 ~! ]- `0 g9 f
end
+ d4 i0 C" {2 a& i" L1 z- h" Sto go
+ O+ P& N( L' ?8 a" Q' n move-turtles: h7 d7 c5 ^4 ]" [4 k/ O; a
eat-grass4 I# @7 U3 r X" i2 x1 s- n+ J4 h
reproduce
# a& [, Z5 Q) e$ h+ w' U check-death9 i9 {% C; ?8 z# o
regrow-grass
6 s- [6 Y6 s" X2 R do-plots
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to move-turtles
6 k& l' c& t& W2 V ask turtles [ l Y6 D* y& h: r3 u5 v
right random 360+ j6 m! P, o- K! u2 a; G. L
forward 1
6 Q6 Z) @: Q( U3 f/ d set energy energy - 1* X! |3 @" l1 @) H( ?: w
]
' }/ R/ C2 c# H" t9 r, Qend
8 `8 f' |& g( v0 y# @( Tto setup-patches$ `+ ]! L7 }' T' a. a2 [
ask patches [ set pcolor green ]5 p8 S1 u' c' V! J
end6 h+ g+ [) N0 p# u: h0 h! m) ?
to setup-turtles
' T( v/ t7 R o$ Y create-turtles 100/ P& s+ X% I2 {5 o# a Y
ask turtles [ setxy random-xcor random-ycor ]
2 \( i$ c \( Hend
5 g% x( m7 d Lto eat-grass
$ u3 }2 T4 z9 q* ~ ask turtles [
/ P6 G" }1 ^7 X9 i' b if pcolor = green [+ _ m5 ^7 ]3 j8 ^* S
set pcolor black+ W& Z% Q; @1 y
set energy (energy + 10)4 d7 w2 l+ s4 D) G5 A
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ifelse show-energy?( w; }$ v! D! ?
[ set label energy ]$ r+ b& f0 G2 D- f2 N- {% x
[ set label "" ]
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end
4 M: A3 }6 }1 B* M2 a$ ]! N zto reproduce+ y8 K6 w$ T; M2 G- a1 f
ask turtles [
( y; }) p- u% u! S/ Y if energy > 50 [4 U5 ?" V/ Q3 k Y, {* ~+ |
set energy energy - 50
$ \; w V5 w2 y4 G1 L hatch 1 [ set energy 50 ]
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]
, C( V7 |/ a# {. ^- fend
; d9 C) M' u* M* B( O& I4 G6 ~to check-death* a1 n" A/ G) Y, _
ask turtles [. x4 ?& ]" R. L" E" L
if energy <= 0 [ die ]
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end' a9 m+ j/ @+ q3 v- N/ `
to regrow-grass
9 w& _/ V* d. F. |: t/ i( c ask patches [- z1 l N- T' L" n- R
if random 100 < 3 [ set pcolor green ]
8 g- _: r5 Q6 G+ h7 | ]4 k5 Z1 _( F/ I# u! S, ~" { M- @, V
end; F \) I4 h7 q/ X( S5 ]0 {5 V4 \
to do-plots
P- y3 @. x8 z# o- X1 ^% x+ w5 K set-current-plot "Totals"" j. }3 u" @5 t! I
set-current-plot-pen "turtles"
2 e4 Z$ c! J; v2 L+ q' i plot count turtles! f& o( }2 g& Y) n( }% d
set-current-plot-pen "grass"# b+ T: ]$ D% K$ y6 z
plot count patches with [pcolor = green]5 K% K% k, C( e4 q
end
+ ?# t; w5 {) ]! G6 N& E& w& {可是运行时提示no such plot: "Totals"
5 D3 {1 ]/ T7 _; b4 Qerror while observer running SET-CURRENT-PLOT. w5 q. u, X* L, \2 U2 F& W2 {
called by procedure DO-PLOTS
) x5 p g' g8 r+ h/ F" j called by procedure SETUP
! x1 x- s" j3 @ called by 按钮 'setup'
+ A5 _8 h5 m: q4 B" f7 D* f求大神解答啊 |