我编的程序如下turtles-own [energy]
; h4 K) h5 {/ t7 y% Bto setup& g* `* i- l, r0 Z3 W3 r* r% |8 w
clear-all
; u! K5 a# | W8 V% u setup-patches: U6 Q8 i; J' t. k0 J5 m
create-turtles 1001 X* S5 i3 y* L( V' }8 ~% t
do-plots
9 E; f, ]) u8 ~/ u ask turtles [ setxy random-xcor random-ycor ]
9 u7 t( z* \6 K/ e# k tend
. X8 w: ~% r4 v. D8 i4 I2 fto go# C: X+ A! C7 e, N! x) l w
move-turtles1 d+ E7 I4 _1 h& H) S4 u% q5 q
eat-grass
1 u( x% `! E( \/ ]$ R: t' g9 h! Z reproduce; g8 U7 K) i% Q! a; F
check-death
7 M$ T( E; J/ q/ F2 M/ a* `- A regrow-grass
) @9 \' d0 D: }1 ~/ T: p do-plots
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to move-turtles
/ J( a9 H1 u# o& Z- r0 M ask turtles [
u2 e2 f! h, U8 |% [8 x4 H right random 360$ C6 h( |- b* Q% e/ k+ G: \- B
forward 1
; M H! g$ @8 z7 Z3 c, ?3 U% o$ C set energy energy - 12 p! I `+ x, y- [# j5 ^
]
) C3 H# O& B. h9 H% V+ ]end
% i$ k# i! n# r1 q8 n5 gto setup-patches
" S" x6 k6 Y/ @: ] ask patches [ set pcolor green ]9 V2 z5 D# T0 s: u8 q4 {% X! F9 {
end8 \4 k8 K8 {# r
to setup-turtles+ X' i: G6 {& |& n/ c* U
create-turtles 100" c8 p" q" ?. a+ o, G
ask turtles [ setxy random-xcor random-ycor ] V/ g0 l7 F H0 ?' F% N
end# v) I0 [6 H4 x$ L! }, ]2 d2 I0 S- r
to eat-grass
. F% u! U+ l u ask turtles [: Z# ?) ~6 J2 J
if pcolor = green [
* K/ _# m4 Q, R set pcolor black
+ ^& M/ w* T2 @ set energy (energy + 10)
9 I1 |$ d9 S F ]
$ i' m5 D0 x! L3 v% A/ }- k ifelse show-energy?
2 D& o0 {! S8 u L" f! J [ set label energy ]
$ T! S$ I# d) d0 W7 ~+ P( A8 e [ set label "" ]
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end
3 T& y" a3 s# F( yto reproduce& N9 V: d+ N9 h. c
ask turtles [' e" n3 H& |3 ~# P5 `9 P# h$ J' x% Z9 p1 @
if energy > 50 [$ P3 W9 v4 |4 q R# q
set energy energy - 50
/ b3 w. Q! Q5 y$ |) Q8 x hatch 1 [ set energy 50 ]7 X4 Y9 B8 u- k+ R- F" d+ l( J( M
]9 ^. u1 |& M0 `' }
]
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to check-death
, x$ Y! k5 E) e( X. Z ask turtles [- Y6 ~: K `, _4 A
if energy <= 0 [ die ]
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end
& @8 C) e Y8 J- Eto regrow-grass
! q- d o' F8 O. o% h6 t ask patches [
1 o4 M3 M6 j! N if random 100 < 3 [ set pcolor green ]
! @# J- \, T! U p ]
# e4 K9 K8 c6 E' k# G9 yend
1 k, M: @9 L0 Y6 ]& ^to do-plots1 C0 o F, s, V$ L
set-current-plot "Totals"* Q% F7 t7 b- X. x! s; S1 h
set-current-plot-pen "turtles"
# z: F, a3 s* f1 i plot count turtles: z+ y% c. m0 _: t
set-current-plot-pen "grass"
" Y* z0 E8 ]& @: w( A plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals") ~; ^# o8 @5 |" k% f
error while observer running SET-CURRENT-PLOT
& h/ V, `( J1 {6 d1 k+ L2 y+ b$ n called by procedure DO-PLOTS
: g+ ^! ~0 S/ a- [2 L" L: l called by procedure SETUP- c/ H# U" ?+ y' b( k3 J a
called by 按钮 'setup'7 b" J" H3 t8 e, n+ |. K
求大神解答啊 |