我编的程序如下turtles-own [energy]
% I A0 ~5 e2 N- f- h/ V; a( Zto setup
; s3 ?$ [* U+ _' f' F clear-all
. K0 l- _* D) N9 z% ^ setup-patches
& R' T Z7 |' @$ m5 X1 ] create-turtles 100/ C% B2 v7 M& h$ G
do-plots# O" ?3 x j6 Q" _9 H [; {
ask turtles [ setxy random-xcor random-ycor ]1 |2 q/ Z3 Y' E& P3 g1 y, o
end
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move-turtles
$ N3 p y P& t# v eat-grass2 d9 Z/ L5 `& V
reproduce
" e ?, W3 l# d# ]5 A/ n check-death
9 p$ p7 Z5 E9 |6 g5 b$ B regrow-grass
7 R2 I/ w# o+ V. u do-plots. R$ f0 k4 x7 p. L# c8 L9 d
end
3 n" Q( Q5 j Q4 Q! uto move-turtles
; E# C$ E1 E8 Z: W% j- K ask turtles [
$ T8 Y7 G' S; P! V2 I- Q4 _9 C right random 360: ^: [# A3 a2 ~/ c9 q9 @
forward 1
3 a' {/ p, a u4 X( q- D set energy energy - 1
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: B( P$ z2 {2 }+ {, w6 g' \end
/ `# J% N9 U8 cto setup-patches
) b" r7 l$ b9 ?8 ]* ~# }8 a8 ^ ask patches [ set pcolor green ]
$ z5 x3 n1 S. `& h9 J* mend
( J8 q; T7 _% m5 R; b% X7 J N, gto setup-turtles. T$ a4 F) l5 y+ ` W9 H# m
create-turtles 100
* x% f3 @+ b5 \ Q ask turtles [ setxy random-xcor random-ycor ]
- `0 h8 P3 S7 C+ [7 [1 zend
, e6 m7 Y' \9 \8 C4 rto eat-grass, S" _ t9 n2 b9 D0 _' H6 s
ask turtles [
" ?7 F5 w# J0 f2 j+ K, F if pcolor = green [
; O+ U1 |" g A L J$ k6 s set pcolor black
( _! }& ^2 M2 ?- A3 M4 m set energy (energy + 10)- i' p- T: g/ t, q z, D
]
% R% }$ u* ~2 F+ n+ L ifelse show-energy?
) f% [- y6 e, S/ F2 Z [ set label energy ]4 c& |2 S U# P
[ set label "" ], x1 D) ~, O7 J+ |
]7 Z+ v- Y# F/ G, |. m) X4 l
end
: v5 f: p; _6 [to reproduce
4 `) _7 G( z' F$ j5 S9 ~) n ask turtles [: [$ _; u. D6 f' `$ L
if energy > 50 [9 e, N3 y- j. ?$ @9 W
set energy energy - 50
- ~3 E6 ~# m/ C hatch 1 [ set energy 50 ]6 Y0 J$ C$ z/ E* f
]
7 ?# }1 z9 n8 |9 D ]$ X ]
0 M8 x" `7 J$ W# F8 k, _/ bend
1 n2 K) p. L4 V1 ^; w: j& Q4 x- j3 }to check-death
0 w+ v0 x# Q0 _! W* P5 ? ask turtles [ h4 Y5 {2 v# h3 L
if energy <= 0 [ die ]3 F$ K' t7 A2 d: X; W- A& Y6 ^9 @
]5 O2 J' o" ^. r% |' p2 C
end/ a) u+ Z8 j' Q \1 ?& _
to regrow-grass& P/ L. w4 s, |6 ^2 b
ask patches [
8 u+ g; Z# I2 q; X5 T if random 100 < 3 [ set pcolor green ]8 E8 G$ F8 l9 ^2 w& {: I
]
% ?; @, C0 O. \0 W% l; H# c5 vend; s* M0 ~+ A+ D
to do-plots
1 Q; K! c: l' t+ O" b set-current-plot "Totals"$ _* S( c, [1 m
set-current-plot-pen "turtles"
2 Z* S: }9 V8 T; C# x, B6 U2 ? plot count turtles' P3 f4 c% l' b0 A- j% U+ K8 a9 }
set-current-plot-pen "grass"5 U8 A ~& y* J7 W8 Q* {1 R' n
plot count patches with [pcolor = green]
- z; `- p& @7 D# E4 h2 v9 w, gend
9 _: y9 q" {, ?0 O3 b可是运行时提示no such plot: "Totals"
% I" S6 N6 D( B: L. ferror while observer running SET-CURRENT-PLOT5 r- E/ z7 @, n7 s& S2 h* a$ }
called by procedure DO-PLOTS+ [0 F/ \7 c/ Z1 }- k6 b3 i. I- {6 n
called by procedure SETUP
& ^# ^1 D5 J9 F8 c& l O called by 按钮 'setup'5 q8 o( n& h7 X! `+ n5 U8 P6 |
求大神解答啊 |