我编的程序如下turtles-own [energy]/ I, H8 q, R. ?: o# j
to setup
1 j' J; @7 a7 x4 ]+ { clear-all: g7 a) q; ^* A" g* T+ x& H) I( i
setup-patches, t c: C, Q% s" C o* f
create-turtles 100
2 y; Z2 n- T$ [8 I do-plots( c. D0 T0 @" s( f2 _4 W; r& X0 F% Y
ask turtles [ setxy random-xcor random-ycor ]
8 n' O- ~; O5 ?0 X$ G$ B- nend
6 G' k5 k1 c% N! R, ito go
p- v' P1 p4 ] move-turtles# y, }& E& ^) h9 T
eat-grass0 K/ h3 Q( F1 ^7 p5 z
reproduce
& R. K$ s9 d3 H" M& Y) e check-death
6 c+ y' z& O8 ]+ E; | regrow-grass
( H, z3 {7 `% S; A9 X; U do-plots
2 }: ^* g7 _: b6 v. }/ yend
3 y0 H# n. v) m5 o' B9 Nto move-turtles8 x2 H6 Y& I& |3 A
ask turtles [
, v3 e( m9 z" \, P right random 360
7 O6 ~# W* e- t' n forward 1
& w% F# j, g# X8 u9 Z" a6 P/ G set energy energy - 15 J4 ^: E R' _ c
]6 [* u Y6 V7 Z" \
end* G1 D% r- Y: ]% |$ o1 o
to setup-patches' `& p5 I6 O' r0 j6 P, ~6 K! _
ask patches [ set pcolor green ]
7 Z% d5 p' B4 O& ?' N5 ?6 c% [end% s$ W# j9 `# `7 e* R8 W- A
to setup-turtles
) p9 t9 @5 p/ x$ } create-turtles 100
" ? |: G* y! D9 W! _, j ask turtles [ setxy random-xcor random-ycor ]/ ^) `" l3 N* [& R2 Y9 L) Z) v0 A
end
5 U9 _3 @/ V, g J5 Rto eat-grass; l7 |% W1 k4 e5 |7 n8 K6 y
ask turtles [
2 g3 K3 a8 ?0 W* m4 W a if pcolor = green [% y& {: V0 f$ b/ I- u1 S
set pcolor black# h; c7 B' Z% Y: g4 L$ U
set energy (energy + 10)
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ifelse show-energy?
) i, \# k$ t' d [ set label energy ]
7 c* M( Q; k$ K+ W" y4 e [ set label "" ]
# r; D2 f7 o, |) I* ?4 b8 M9 n/ u ]( j B' ~' g2 g5 |- A) z0 U" ~
end* c5 O$ j. l) k" I: u0 _
to reproduce
8 y- z& a* o" i8 i ask turtles [
4 L! L- i: a; Y/ K9 O [4 @ if energy > 50 [3 g' a/ V8 h8 k
set energy energy - 508 D, Z b9 O W
hatch 1 [ set energy 50 ]* j- Y2 o S- W" y! |
]+ |. a& |% i! r- v" D1 l
]
" _' T" ~9 P; c& Fend) \5 c, U' D! v( ^/ }2 f. Z1 e9 }
to check-death
0 L0 p5 X3 ~, Q& S, F( m2 r ask turtles [. K: m$ }9 Q3 |( r: o1 @
if energy <= 0 [ die ]
) y3 _9 x; M& P& r$ d4 l6 G ]% D& Z' b1 v- p( ]
end" z1 q e( F( L6 I4 j( ]4 V3 L# n
to regrow-grass3 c3 b! Y$ Y! L
ask patches [. ] u9 E4 O. ?5 a% S
if random 100 < 3 [ set pcolor green ]
- }# ?5 \" p' m: r/ S( ` ]
/ n* r \ Q1 O5 P2 G" I2 b6 pend1 }9 H7 r; w- ?9 i7 L
to do-plots
* D `* K/ n5 _ G6 g6 } set-current-plot "Totals"
5 B* i0 j2 |; y9 C; P9 a& Z set-current-plot-pen "turtles"5 }: A% a8 a) n# g
plot count turtles
- S$ X c! H/ |9 S$ F set-current-plot-pen "grass"
$ I. u( Q, h* o l plot count patches with [pcolor = green]7 ]+ k5 d9 [, J' E: x' \
end
5 V; r/ N6 p$ u0 R可是运行时提示no such plot: "Totals"+ ^4 O! r% E# |" M; E/ [( ~7 }
error while observer running SET-CURRENT-PLOT* D& Y/ i R9 K" x8 C9 l+ `) D
called by procedure DO-PLOTS+ G) ]: ?/ R5 Y* s
called by procedure SETUP
" U* d! k* _3 c/ q4 e2 ` z called by 按钮 'setup'( U( ^5 }! \/ F& H$ [6 P5 K
求大神解答啊 |