我编的程序如下turtles-own [energy]& K$ b& ?. ~0 A# d
to setup
1 R# O' _; j$ M" Z$ k clear-all" T/ |' D" F' X& x$ f1 C% M( _
setup-patches
% q3 q5 V- r+ e1 \3 q create-turtles 100
2 u$ r# j5 O6 W, k7 h: Y$ a do-plots6 v1 E; k2 K" a6 y a
ask turtles [ setxy random-xcor random-ycor ]1 J' i' |4 N- C& X) B! {
end
: T9 B2 w9 Y: d$ U% Xto go
; v* L9 r3 K! R' x move-turtles* R l1 X. A! }8 E
eat-grass# m( K. l/ Z8 f' h+ t5 x
reproduce& _0 o8 x, V6 k, m: p8 f) x
check-death
! I; R8 v' ^9 @: f regrow-grass9 T t* `% f1 N7 W) V X. Y, ~
do-plots
' I- k. G; V+ _6 Vend% q! p. c/ }- x: d; m1 b6 ~
to move-turtles
5 w7 _" a8 f' U- c y) V ask turtles [6 c: I' |: Q& X9 T1 T2 G5 Q* s3 R5 t
right random 360, N2 ^- n: a0 e: H' o5 d
forward 18 M( d" i5 G( F$ X6 |. y/ ]$ H
set energy energy - 1
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end [4 S/ p. m& @7 w5 b- _% N
to setup-patches& i, w$ T* F" Z. z$ I/ Y% d, \* o% h
ask patches [ set pcolor green ]" x; }$ d' p8 Y3 d3 K v, w7 ]7 A
end: l7 D, C% T) s" L
to setup-turtles2 p* U7 j- M8 }" `2 Q8 A
create-turtles 100+ j7 w- q4 r) Z! @) l
ask turtles [ setxy random-xcor random-ycor ]
: Q0 k d$ g! ~& aend L4 d$ P% v+ ?
to eat-grass: C8 |- V* X6 {3 U l j- @* ]" q" L
ask turtles [
" z4 x0 @& I& D' ~, X$ g/ S' T if pcolor = green [
$ c' v- }( Z: i' K0 }( m set pcolor black3 p; T* k* L. a4 ^4 b7 a4 w& P P
set energy (energy + 10)4 F8 @ l# R( N2 _0 h8 z
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ifelse show-energy?
' s( I# j( b8 \9 m6 O6 U2 d [ set label energy ] Y. y$ P- z5 c4 h y" [3 d- [
[ set label "" ]9 j# V$ |2 b0 {6 E- W: ]
]
* I: I9 P9 C" G7 [+ nend' v. k H d8 E: h3 L, g1 @: b
to reproduce
) H* g v7 ~! r1 V Y& w* H ask turtles [/ l& a8 l. l- c0 X
if energy > 50 [$ [* Y% j# A- S' F/ G
set energy energy - 50
$ }0 K* D, }% w$ l" L( R( x hatch 1 [ set energy 50 ]6 z. @7 K. d/ U( d) @0 {
]. `1 ~7 n& k$ s; d) b F( y
]2 e1 y+ H/ \- G4 \" L8 k
end, U. D3 [! ^ d& S; X0 K
to check-death
7 H' E; _( x2 F' l ask turtles [
6 B9 R7 ?9 m# y- ^; e if energy <= 0 [ die ]
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end3 F! \0 Q G: e/ _; u: f" o
to regrow-grass. G1 o/ Q* }* R. _+ a$ h
ask patches [; m# P0 R# v! M% N9 `0 u
if random 100 < 3 [ set pcolor green ]
! w; M/ b( l3 D j% q/ }' } ]
~) d' B0 W& nend
; p. V0 s0 Y# ~4 Z7 z3 eto do-plots0 o. \1 Y/ o6 ^: m& y
set-current-plot "Totals"
- t) J, G B: E. @- j set-current-plot-pen "turtles"
# a$ k/ ]% }! H# ~! o plot count turtles
5 D: T1 X, \5 I set-current-plot-pen "grass"7 I, `" ^# }$ a, z5 D' u
plot count patches with [pcolor = green]
) |. F. W* H2 h2 w$ x! Z0 N" ?end
5 Q& P5 W* ?4 C h, |- ?1 P# F. {! V可是运行时提示no such plot: "Totals"
" o$ W0 @! T- G6 ^* uerror while observer running SET-CURRENT-PLOT9 p: Y: X7 }$ l: p) O
called by procedure DO-PLOTS3 ?0 F8 A! b4 J' z* q* ^) O
called by procedure SETUP
0 U0 o4 A9 i% b called by 按钮 'setup'
) i" D$ t: ]1 C6 ?: {4 u i* a- j8 S9 F求大神解答啊 |