我编的程序如下turtles-own [energy]2 k2 D7 c' v0 F% o
to setup
" P1 Z% n0 U: u/ F# ]- O clear-all, ^7 `/ G% z: v% J0 p) W
setup-patches
; n2 z! Y9 }6 c$ B' Z) ]9 L create-turtles 100
$ a" s1 O$ T f0 {5 X, w do-plots1 i" `0 K: _, {, [( S
ask turtles [ setxy random-xcor random-ycor ]
3 J$ T( j& W. b) fend. H$ W" D0 U. z. u# b
to go) K' [$ A+ _$ u
move-turtles( ^8 s' P: m8 | Y; p0 K( }
eat-grass6 y, p* s7 D7 R
reproduce
7 l7 a( f7 t; Y% f; ^ check-death( q( D7 Z% @% T* v! t$ v5 K6 U
regrow-grass
2 l+ E, q4 [/ Y5 T! } do-plots
) n* c& b* b( t: K7 l, c" G' W' I2 Jend7 m4 G- P) w$ N5 V3 ~- K( w4 [5 k
to move-turtles
F9 m1 @5 Y% @: c ask turtles [% e! c7 v9 {* m) D) Q+ ^4 @0 ~
right random 360
# K4 e7 i# D6 i forward 1
2 b' f9 R0 G Q% I3 L2 | set energy energy - 1
& \ z v$ d3 a ]
& C+ m; k H2 O' Gend
9 k+ X4 \4 h& b( J: N% {5 yto setup-patches/ I7 h/ Q+ P! h0 ]; z+ Y
ask patches [ set pcolor green ]3 `& _/ x- H) U7 d4 q
end
# J) R y$ u, _* f- w, u; Vto setup-turtles
S* E2 f) @- W* t+ k create-turtles 1004 A* H% Y5 }: A
ask turtles [ setxy random-xcor random-ycor ]
# e: q$ q% m) V; K; Fend* s3 }& ^: Y( k: ~. V8 W
to eat-grass% {! K3 i1 z: z2 L$ E
ask turtles [6 l3 Q5 L( Z: U( p3 }
if pcolor = green [
0 A" j5 P0 D0 k set pcolor black
! x9 D% J0 n1 x set energy (energy + 10): _; C1 \' U( d3 Y3 W6 b4 g* ]
]3 k2 b2 S( [8 T$ T8 c& g, [9 k
ifelse show-energy?
2 `; g2 Y1 {+ h. l r, v8 x [ set label energy ]( w2 N/ Y6 K' |9 z {9 _: q y0 f
[ set label "" ]) l- ]; u- w# P* z: Z5 b7 ?# s7 D1 K
]
6 a, R) }+ D+ Eend
" c* J& ?/ R& x$ R# @! l" Tto reproduce6 I# }8 `' o; _, w2 f$ y
ask turtles [
; [; d u, b1 b2 C if energy > 50 [
0 m9 C+ b# r; b, l set energy energy - 508 d! H* \; a( T, U, O
hatch 1 [ set energy 50 ]5 e" |7 D% z+ o2 `- M! u+ c9 y( |
]
& ?% \. x1 Q: I# P, ? ]
7 Q4 x0 o' K: J. g3 ~end
; @6 M1 B; c2 m) i* i5 gto check-death7 Z; {* B3 a/ u% a: ?
ask turtles [% l& U0 W7 ]) _2 d0 ~" N
if energy <= 0 [ die ]/ |! R7 @& ] w) H8 p
]) s7 \' O ?5 Y/ g0 Z
end
3 X9 p7 n) Z; ~3 ^# O: ?to regrow-grass
; z4 ]9 }1 p$ G9 K5 ]0 X4 P6 d ask patches [2 |. h; j9 A0 a4 u" B
if random 100 < 3 [ set pcolor green ]
. S! x- U# Y! p6 g, U/ i ]
% P q% y- W8 O( X, jend
0 [9 I+ k5 o5 o$ E3 h& p. m7 o qto do-plots
& I# l9 J% F% o set-current-plot "Totals"# z0 J9 ^, E& h8 X
set-current-plot-pen "turtles"" k5 p( E* g& E" Z2 O
plot count turtles
6 h8 {' _( Y7 k" u; W set-current-plot-pen "grass"3 L7 e3 d) ^* k: f5 F
plot count patches with [pcolor = green], s# ~5 R. K5 A8 D) g
end
0 l2 w; W: B9 }4 w1 P. c3 w! w可是运行时提示no such plot: "Totals"
& g. \4 k/ Y T$ o2 ~3 Xerror while observer running SET-CURRENT-PLOT
; ?7 b5 Q. ]' P! c* M6 n8 Z called by procedure DO-PLOTS
$ c/ i! T7 ~6 W6 H9 n, s4 R called by procedure SETUP
( [' g* d# B; J2 @& w. a; w" H called by 按钮 'setup'( F4 J- P' Q) r: ^
求大神解答啊 |