我编的程序如下turtles-own [energy]4 t" _" E5 A6 P: K
to setup
0 X0 C. X2 }; W4 e: S$ w clear-all3 i: U" S) ^+ t: P. p3 L0 N% P
setup-patches
+ s& M; }+ y( T1 F create-turtles 1006 \: J$ L4 E+ H
do-plots
! Y5 x1 o) [" T" t2 E ask turtles [ setxy random-xcor random-ycor ]
* Z. R9 ^0 V8 v4 J7 yend
$ H* [( K4 c( C! C. R/ i: C/ [; X5 Qto go
; ^' U3 E1 y) c& P8 e move-turtles9 O1 C3 Y$ \4 R6 [
eat-grass7 Y% J( }* i1 ^5 M4 | _8 i
reproduce! p% J: h4 W8 q9 G! I
check-death
: W2 T/ Q% p& W4 j5 B! L. t regrow-grass
: m0 b# i0 `( T2 \% g: H w do-plots
u7 m& w7 o0 ^4 Oend
0 b: g' j. A% {' V) I: Nto move-turtles0 }+ d- w k' e" B
ask turtles [8 ~% g. K% X- `9 a
right random 360
$ O. Y* e! j/ ~$ z' | forward 1# e z/ h6 Z4 D1 h9 m, s5 Q
set energy energy - 11 ~% M6 t7 ` [1 y
]+ g: j( E0 e+ Y) s! }: _
end
( |+ `- t* {8 r Q1 dto setup-patches1 H3 C B4 k0 b8 ? r/ k
ask patches [ set pcolor green ]
( x& m" ^1 x' {. ?$ C$ }; tend
! f* ]; z& i" |$ Q" q# Y1 \# oto setup-turtles) n2 ?8 S$ w2 ?" J9 d
create-turtles 100
9 a# }! p% X3 k, `- G" z4 u ask turtles [ setxy random-xcor random-ycor ]
" F! m# P& G4 \% s2 Gend/ Q% M v( q/ v- b
to eat-grass; ]! Y. a4 D; `- P
ask turtles [$ E# b& r) I* L7 z# U
if pcolor = green [% T: s, m0 V# r7 Z/ @2 E
set pcolor black
! c. z2 T' w5 g! H) R- e set energy (energy + 10)2 d; _# R# y4 J [0 P1 C) x
]
1 `+ l" s& T! h' D D+ C3 |4 { ifelse show-energy?
' G- T8 @, }/ Y! V+ r [ set label energy ]
5 S9 z* T4 n8 a( A- h [ set label "" ]
. B# G' C v6 ^$ Q; z2 C+ k$ B) z ]
7 {( m& V1 z( l0 G6 _( Iend
4 n1 I1 ~5 I& i6 Jto reproduce! n8 ^3 ], E; }; P% m
ask turtles [
! P8 \( f V4 @3 u) K( V, @" q if energy > 50 [; L9 _4 P$ U4 x6 `
set energy energy - 506 ]/ }" L% o# v0 n9 d6 L
hatch 1 [ set energy 50 ]% [8 S# W& ?3 C' Y5 p
]- C$ g) X7 A2 s: {6 X* P! J( l/ r
] [( G1 `& P; X+ ]6 m
end
2 u/ Z2 j ~$ Y1 R& Mto check-death. O9 i- a- n- }1 }; ?9 q6 D9 N
ask turtles [8 T; \$ V2 L, ?
if energy <= 0 [ die ]9 g2 [9 M9 J1 C- u _) i1 t b1 o
]
9 q8 _0 q' Q9 `end
) w3 X1 d) o& G/ f6 uto regrow-grass
8 b/ N) X! _. H6 B9 Q I% U5 d0 { ask patches [" j( ?" g( m* l9 ~7 s0 C1 ^( F/ B
if random 100 < 3 [ set pcolor green ]- @: H2 P [5 F1 \& k# O
]
n j @1 S/ v3 |. } Uend
; n9 [0 ^* m3 h; W; Cto do-plots
% }+ k0 Y6 |4 K# I3 H set-current-plot "Totals"
2 R; ~+ s1 f# \& V& _1 a) L& H' T set-current-plot-pen "turtles"' \ n) d6 P% c$ A$ o& f: T0 |: J
plot count turtles, ~( A9 @4 l$ `5 V6 b2 [7 g
set-current-plot-pen "grass"
8 C+ h" k6 b7 w plot count patches with [pcolor = green]
$ L( t4 L& ^+ ^) {: L2 E, `( uend
9 E* K: i4 Q5 V4 {# T, F2 h g可是运行时提示no such plot: "Totals"
7 A, H [6 G/ o5 x7 a0 }# kerror while observer running SET-CURRENT-PLOT
`/ j) S( u0 Y! c( W called by procedure DO-PLOTS
" o; j- S% v) k6 f) K called by procedure SETUP7 |7 E; Q- V) h7 J
called by 按钮 'setup'% b$ B2 `! }2 b# o! O" e2 d8 N
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
