我编的程序如下turtles-own [energy]
, r: S; p3 J5 `: U/ }' O' Ato setup- n) L$ s) s. ?% y0 _; P$ u7 N
clear-all7 u" e" N7 X J( U \" ]6 r
setup-patches5 F& n$ _$ i: Z5 }
create-turtles 100
3 k' e/ l4 h$ B- I; p do-plots, V' B, D$ O, C" i
ask turtles [ setxy random-xcor random-ycor ]) \2 ~6 k$ W6 a, n F* y# Z
end" v! u' |: j+ K+ }$ V6 j1 Y
to go8 A/ Q+ \' f* B; s
move-turtles/ \2 f" V7 u: |* T
eat-grass" P9 }- W, W! X% q1 @1 z7 |
reproduce
+ P" P5 a% i0 P check-death
' ]; |# o6 `, z" T2 G regrow-grass7 T$ Z4 Y/ q- B p
do-plots& w7 {$ y" p4 f9 u8 o
end1 n6 z _+ B5 q m! [& j2 r9 W4 h
to move-turtles; X. }% g! S ?) v" E
ask turtles [
* P# x* A/ m8 ?- i+ U0 f+ l" \0 V right random 360
. u+ T' \ q$ r* y" R4 _8 U forward 1
. q. F0 {" k- l set energy energy - 1
. o) @+ z- u! e/ i$ t ]
. W4 j) |* w3 Pend
1 }1 V# f4 {( T/ i1 ]' f, O ato setup-patches
$ C- u0 U, n9 {% _ ask patches [ set pcolor green ]
" y" P( G' L( S. M+ I$ A5 }- V2 send0 p H" |5 `0 A3 \. q
to setup-turtles% \5 g$ m4 f# t$ i. E5 r. E5 `
create-turtles 100
+ f* k( R% ~7 M. D ask turtles [ setxy random-xcor random-ycor ]
5 Y1 l6 k2 A8 X9 X# e. uend" V! S# G% o$ j( `/ j7 E( j
to eat-grass
( A$ {, b6 C g* j+ {' O$ t ask turtles [
' u/ O& m0 k6 y0 x* @! @ if pcolor = green [
6 ]' Q' N; g* T$ S9 _$ E set pcolor black! e" f( t9 n6 A2 X# j% X
set energy (energy + 10)2 G$ g/ l4 k$ b
]
+ M0 k+ g& }9 J# ?0 ? ifelse show-energy?) [+ D4 I7 }! b1 C* S8 L( o. G/ h' m
[ set label energy ]7 x$ g! C. H( f
[ set label "" ]
1 P6 F! L! ?. N. t: e7 a. C ]
9 K: k5 m. Q% o) z% gend
+ N9 J& p2 R$ s9 Y/ x. F$ cto reproduce
' O8 G: @6 q' ]1 h0 k; r ask turtles [( n3 g7 v( Q/ |* r" s2 U
if energy > 50 [
7 g% [: a+ Z7 {1 F4 ~5 B set energy energy - 50
) ]9 h/ m) V4 r; u hatch 1 [ set energy 50 ]
" M8 h# M/ T; f, J1 }: _ ]: ?% \# T# q8 }; y K! e
]
) P7 D. n- A T) \6 Q. Cend
' Z3 x. H; x$ P/ O# k3 Jto check-death, _4 c" O- a9 R% a0 W
ask turtles [, t: H( \* ]2 W5 l# Y; C
if energy <= 0 [ die ]" T! R1 A3 I! s- R+ b( `
]
( I2 R9 S: K+ C' ~; o, gend
+ f: z! Z9 c5 F: S; @0 h) Xto regrow-grass
& F' U# I3 K0 X5 X8 U$ ?7 h ask patches [% c5 @: A z, z% O* I- e3 w
if random 100 < 3 [ set pcolor green ]
! |0 |: @% N2 H. r! I ]3 [9 T. a! W5 H* T/ e, S1 f' s' F
end
7 d" U5 W! f+ xto do-plots- I' Y* n, }4 x* h
set-current-plot "Totals", I& |3 d0 s( o5 k, ]" {
set-current-plot-pen "turtles"! g) L5 q9 D' Q% H. e$ B; B+ ~7 E
plot count turtles& z$ H0 i" U% f7 \
set-current-plot-pen "grass") i/ {. E! Q/ L, A
plot count patches with [pcolor = green]# z# S& Z6 W0 O* J
end
# X4 k0 Y0 l) B7 g可是运行时提示no such plot: "Totals"
$ b ^" E* E2 D. q8 k8 m# j5 `error while observer running SET-CURRENT-PLOT
! C0 v" I; @9 T6 v2 a- _4 Z called by procedure DO-PLOTS
5 w$ `( v6 B! I- ]0 n' V called by procedure SETUP C2 m- y9 t: e/ M) U" E
called by 按钮 'setup'1 s5 b0 V2 R4 `% K- b6 j
求大神解答啊 |