我编的程序如下turtles-own [energy]
) X5 V" B, _* W2 ?( ?# n1 R+ Mto setup
: A# g9 @+ Q% i6 s- v% V; l clear-all2 z9 L- z S- A
setup-patches
& ^; W4 |" W6 ]3 {, i create-turtles 100
/ o' ?; P% p: T& w0 S* d do-plots
. ~9 x% {; t, T# `! I' r ask turtles [ setxy random-xcor random-ycor ]( n# Q$ r% b6 ]& a5 j
end0 a! @- q) ?6 J2 X" [
to go, J# H% n( }8 p5 R
move-turtles
# B1 A+ ^: ?7 T eat-grass3 B3 |/ f( P: W1 a0 M! j
reproduce5 v( Z+ Z2 t! Z# p0 }5 N
check-death9 z" z+ ~/ v/ w
regrow-grass
+ U/ S$ V) Q6 N' J+ \' A: j do-plots
: }. X" e5 L) J# e; T8 Z- {. Y4 P6 s) Wend
7 l, Q. @: f, Q# j6 @+ sto move-turtles
' L# K$ V1 s" R# w ask turtles [
2 o/ Y- e( {$ M& \* @5 l right random 360
7 ~/ R/ r9 o( _$ T- }" F5 k. F forward 1
5 A' s& t% @4 P' I set energy energy - 19 P5 |. z% S( D( Z' s( H3 S1 C8 L
]
7 k* `3 d r6 @9 Wend, m, j2 X; w$ p+ ?
to setup-patches
5 h) i: F& f. }9 w5 ^! E ask patches [ set pcolor green ]
- d7 S" B, t* Q O0 o# I+ yend, T) s) D. X( L# W0 \- ?
to setup-turtles: ]5 N/ \7 {( \, m
create-turtles 1003 i$ W5 Y2 R, n' v
ask turtles [ setxy random-xcor random-ycor ]
' A1 R5 j: W8 D6 send/ r: x1 Q. [9 k% j* h
to eat-grass7 B, U4 z& o0 Q n1 c5 T/ l0 b! P
ask turtles [& {* c. y1 @, a) d
if pcolor = green [
; u+ a j K' a; A+ c, i set pcolor black) A) K- Z: G; |$ o; F; A( W4 V
set energy (energy + 10)
. I5 x/ ?5 e0 n6 d/ b3 U& E ]
' P. B2 Y7 @/ i* M0 o- z ifelse show-energy?2 S/ @/ }6 \' j/ d% {
[ set label energy ]- @, Z7 [ A- Q. j* r9 q
[ set label "" ]
) c0 @* S* K. v" H1 [ ]
) l6 t# j' ]/ ]+ Q9 h% Z8 Bend
$ u$ }5 v! F( v5 mto reproduce2 Q# O. e0 i& I# D6 }
ask turtles [5 n, _% } n I: d: h a
if energy > 50 [; v8 O, ], G3 H1 \
set energy energy - 50
8 w# ?7 ^5 Q8 ?! K6 J9 j hatch 1 [ set energy 50 ]+ G# F0 r; M+ t7 x
]
2 L0 r& C( |0 e; Z* R ]
2 s- l; X( t- s9 tend. J2 ~- T6 P `
to check-death, g3 C* v( z8 N, L7 }- w
ask turtles [
$ ~( \: h) e; b- j' k U4 P7 H- P if energy <= 0 [ die ]: V& P4 g' Y5 \4 W9 ]
]
) {2 @- K. V9 } Wend. f' r$ X2 ?, P
to regrow-grass0 r7 K4 L7 [8 a& |9 S8 H
ask patches [
. Y) f! h% `, v ]+ C& Z6 j if random 100 < 3 [ set pcolor green ]0 F0 [6 a0 y' P! ? m- _7 ^% l
]' ^# {$ x# u* t- ]4 E# F) i0 o
end
, W+ a+ I. A) l$ O* E0 Y0 xto do-plots
2 ^0 i; y; Z! k set-current-plot "Totals"5 O0 z5 V9 e8 X+ ^' s$ s5 Z% {
set-current-plot-pen "turtles"
; {' A# j. x" H W# y/ ] plot count turtles7 b6 P2 Z( s$ s' L
set-current-plot-pen "grass"6 x) o: @" Y- q1 Y5 u
plot count patches with [pcolor = green]2 K# H6 @4 P7 t6 C# ~
end
. R W/ |2 `- R" z# ^$ T可是运行时提示no such plot: "Totals"
& z( @3 s3 q8 \5 C; P" Z _5 Serror while observer running SET-CURRENT-PLOT0 E4 W# {) h* Z9 r% K0 S, E$ g# l+ p
called by procedure DO-PLOTS
3 c) K* q( ?0 k5 E9 v called by procedure SETUP+ G7 ?0 u6 N# b# E
called by 按钮 'setup'4 S5 y8 P$ N* D3 d, o/ G
求大神解答啊 |