我编的程序如下turtles-own [energy]/ |4 S+ u7 x \) ?# V; ?
to setup
% s# z1 s1 t" Y clear-all
' L& S2 [, h7 x& ]" X9 G5 k8 O9 @ setup-patches2 C! y$ N' R' }6 b% T& j, z* P
create-turtles 100
) I8 k( d6 `! N/ b+ U$ o& _ do-plots
! `! g1 N6 U/ M& y& Q7 a+ V* r ask turtles [ setxy random-xcor random-ycor ]
0 ^8 h/ K1 s) R& y, a" oend6 G& I) g9 T* ~7 G" i: A
to go
" h- N/ g0 H% |+ A7 j' v+ j, c' E' B7 T move-turtles$ b0 E3 M; `) N# r3 n
eat-grass K. p) U \3 P9 l
reproduce
& g# f4 d, U; ?+ @7 J check-death3 N% `" D+ P$ l4 K) X
regrow-grass
0 P7 N" ~: x( w& L do-plots
7 E/ }( x; z9 w; n" V' L' `end# ^1 T4 h3 ?$ X, H
to move-turtles
/ \2 B! ?: n: k5 N ask turtles [
. o5 x: p( Z" U! }$ f+ q. P/ p4 `5 S right random 3606 U( J0 p$ U' }
forward 18 i1 [5 Z. q: D. B) o' ^0 Z
set energy energy - 11 Z" M9 {( L7 c3 W: h
]
5 y( S1 o J8 N% j, Qend% ~" E& a2 x5 _3 L7 W6 [
to setup-patches, f; n% ?) M4 y- c8 P5 P. ^ o. V
ask patches [ set pcolor green ]7 M% G. h; S: s
end
5 p2 \/ i. k7 R( [' a3 ^% Rto setup-turtles
! Y* c( ]" |( S) S% j+ g- Q. v create-turtles 100
; M; k: ?5 k; L h# J& o ask turtles [ setxy random-xcor random-ycor ]
- A) d3 @" i- x0 A; b1 G5 Vend3 f- g0 ~/ D0 X0 c# y# P. |1 u8 O
to eat-grass
% g+ A4 [! q. E, Z9 V ask turtles [8 [, _- t) p g, f7 ~
if pcolor = green [& B' _* t# A/ L. M+ g& T- i
set pcolor black
& _0 o% _( O* l k8 W0 l$ ? set energy (energy + 10)% `% V& n$ z# S) `( h4 {! W' x8 h
]
5 p( ~' }% Q( Z, _ ifelse show-energy?
# y+ j7 T9 s8 g [ set label energy ]9 K$ ?+ Q; h, r7 L3 e
[ set label "" ]
- ?! w, a& z2 O0 |/ t9 b9 b; G ]5 e: Z0 W4 N$ v" A4 g) p
end P2 T4 P# J" F8 k
to reproduce
6 C. ~$ @) U7 r$ ~8 |, r( j ask turtles [
( z+ g- I) S/ m2 f" x if energy > 50 [
( ?3 }& p$ I6 N set energy energy - 50
" O' J* x: v7 U hatch 1 [ set energy 50 ]' |. P h3 W( s2 Z' o& F1 R5 ]
]3 E1 J7 O+ j- e7 R+ g
]
# a) T! R( a/ C, n$ e send% f$ \2 u$ Y' s, S" ^/ g
to check-death* O% Z; U7 d5 `. u% S, A+ I
ask turtles [
5 i* o6 d/ ?- k+ J1 `8 G if energy <= 0 [ die ]
" d5 W$ k: x$ D- W: n$ ^ ]
4 u8 R; L) d6 Z/ [9 c) c, Eend
) N. h: g, x Y8 s4 g2 T, Eto regrow-grass( w5 O" u2 J. ]$ `% J% S
ask patches [
# ?" L! \ p# D( ^+ n/ ] if random 100 < 3 [ set pcolor green ]: d4 {+ l C( u4 ?: L% l# m8 F
]- m' j9 a' \" q0 ]- W
end. Y" j# }$ x. b/ D! v6 M( q
to do-plots0 k9 G; j9 \2 w1 Z
set-current-plot "Totals"
, N. O1 c6 a+ p) t$ s* ?& r set-current-plot-pen "turtles"
/ l* C5 V0 v. ~1 J1 j% a5 C plot count turtles
+ @8 Y, @( Z& e# M- ~0 P set-current-plot-pen "grass"$ T% t+ p$ x9 a3 g/ z- O
plot count patches with [pcolor = green]2 D$ S. \& B# _/ K2 ?
end
% v. q8 B* L+ j可是运行时提示no such plot: "Totals"
9 ]: L- K) P7 terror while observer running SET-CURRENT-PLOT% A* K( A( J" s+ n, [$ ?
called by procedure DO-PLOTS
1 \0 ]+ H f& b2 _ called by procedure SETUP
1 t: w! T$ d$ d9 j( F. a: s5 g called by 按钮 'setup'
# p& q9 t7 F& q3 h) h求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
