我编的程序如下turtles-own [energy]* L" R- b9 a2 O+ q
to setup( |5 p) c* g9 ?3 a
clear-all
/ [5 J7 l' V; c4 T+ Q: H setup-patches
# ?9 u% n; L6 P* k$ S create-turtles 100
! o2 i3 e9 R" {# K" b4 p1 b- v/ Z do-plots: O- z6 Z# i2 p$ ^2 W
ask turtles [ setxy random-xcor random-ycor ]
5 ~3 Q) W5 ~& `; q5 W* y4 Zend
. m& l3 {2 U' ~# Hto go
+ I- T- w0 K/ k6 r9 Z move-turtles
! O; k3 R2 g0 o9 i% _( x eat-grass( b I8 \# _/ i* W1 f5 p3 ^
reproduce1 I, ]! w. p8 }8 P, D1 b
check-death, C, x! ^) s4 q& f8 u
regrow-grass
: X7 H+ `, G( }1 G2 F+ E; l" @& F do-plots G% k: I# W" x7 G; j; p; Z/ h
end$ @: G/ G+ p. e1 H3 y
to move-turtles
5 z9 I: b; V. D- {( W! P ask turtles [+ s* _% w5 p1 q0 U: V
right random 360
6 |5 I4 {4 u' l+ r, A W1 } forward 1
0 p( {5 k% o- F: d2 M+ h0 F set energy energy - 16 y& h' H. ?& {* n5 z9 [
]8 Y8 `6 q! D8 m- L" \( X5 Y {
end4 w' o, ^3 {1 o F* e `
to setup-patches# _8 i1 k, k' I3 X' N) e* ?
ask patches [ set pcolor green ]
7 P) H& c8 E$ ~$ o& N& n- j. tend
# h9 Z( W# r9 A7 Zto setup-turtles
, w+ M& D) _& b; y( `& Y+ @" x create-turtles 100) k% O9 S; |- Q* W( @
ask turtles [ setxy random-xcor random-ycor ]+ ?( J* J1 l! t& v7 N; K
end$ f, W, i0 ~7 v6 p- }, }- y* S
to eat-grass
' z8 h4 |1 M& U; r! U) E ask turtles [
]+ u* e3 f. @) @1 C! t- s if pcolor = green [
8 R9 K% p" y7 T5 H. t$ l set pcolor black
5 x5 C" A2 e0 g6 p4 Y- L set energy (energy + 10)
- w( c& K& R/ A6 o9 t ]7 T- f. X6 }2 m ~
ifelse show-energy?
% {% P: c5 G: D$ l1 V. a [ set label energy ]
( X' X4 H$ y4 O- K- t [ set label "" ]) B% k3 L) @% y9 c# x
]/ W$ n, [7 S7 b5 b
end4 @" K- Z# p3 f% U7 t, ?- H
to reproduce2 ~8 Z9 ^. s; w; D( N8 y
ask turtles [
$ F) @3 M1 e+ N2 X if energy > 50 [0 T/ k7 T6 d1 {: d1 f0 E7 y, _
set energy energy - 50+ y9 Q7 `8 y. g
hatch 1 [ set energy 50 ]1 t3 [- G& l, A) p# m' m. E t
]
2 q0 a" M% W- N0 ~/ e ]; ]6 `3 _6 k3 @3 _) o9 J
end
# _, B4 X; C# Gto check-death/ P# U# h. e; ^. n. \9 @' B2 p
ask turtles [) M, J! q2 b$ r7 C" `
if energy <= 0 [ die ]+ l, p, Y, h! J: d0 ~7 b
]
" N' ^' |7 }- x. J8 C+ wend
o7 i4 f& S3 T3 J( W* tto regrow-grass+ o$ H# \( [. w4 X5 P
ask patches [
/ A1 j$ x# t" f8 t9 F' R if random 100 < 3 [ set pcolor green ]" s. {! u( V: X* n
]
* b( t- F& y2 p8 h, _end6 q i3 d! d( r& o6 k
to do-plots! A8 G M+ z" Z; W `: h) S
set-current-plot "Totals"
# E# V8 f# y6 r# h set-current-plot-pen "turtles"' K1 ~3 A1 J5 |2 k$ c' X
plot count turtles
, a( V8 m4 f1 v; D2 O set-current-plot-pen "grass"
: E" q: o: ^7 H plot count patches with [pcolor = green]3 q! U3 R3 ^7 h) ?+ t. a
end
1 ~- ~( J8 ?& b' b3 H可是运行时提示no such plot: "Totals"2 ]5 W5 o4 o* o4 E* X2 H
error while observer running SET-CURRENT-PLOT
( `- N+ {; Q3 `$ J3 o0 Z" ~2 n* C called by procedure DO-PLOTS
% @6 b' D$ d1 M6 G called by procedure SETUP
8 W" Z W" w2 z |4 s0 { called by 按钮 'setup'4 ]) H9 P+ J' F2 }
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
