我编的程序如下turtles-own [energy]
3 V. B' J6 Q) g* P& J9 _to setup
8 H* S; {' j) F) n) g" \ clear-all1 c1 H1 o( p# ?7 v
setup-patches
4 }+ O6 V7 o$ t# C3 r [9 m create-turtles 100
7 [: |# u$ [" ~/ ` do-plots+ ]( L5 P; k5 }1 T# V. a8 b9 O& C
ask turtles [ setxy random-xcor random-ycor ]
/ K' e9 N6 z9 e2 B: \end {6 {3 e0 R- ?
to go
' ~* H& d3 g2 D1 w' G$ | move-turtles
% g: ]" d% }- Q eat-grass$ T1 n' U2 [& z) Z5 `, M* L4 e
reproduce
# A. w3 _" S7 {) O* f' J check-death8 m! U, R. l/ \$ P
regrow-grass! U- ~( h6 ?2 Q6 K8 y8 e
do-plots( P; Y2 g) a! Z" b
end0 y. H* E1 ]. ?# O
to move-turtles2 X" r" u7 T' V9 K# W2 Z) T
ask turtles [3 X, d+ F8 I' i
right random 360' ~& h V+ q' U
forward 1
% w) e" w! {: v& a) T1 K! @) I set energy energy - 17 z6 U Q6 F: J3 V
]' \9 x) u Q. E |3 C2 y3 b
end
' B. O& a1 l9 f: g% }$ mto setup-patches% r ]) k$ p T( J3 T6 ]
ask patches [ set pcolor green ]
6 _# V' o% n0 u8 r4 D' tend
! M2 }) |: w9 c. }4 e) y: x, rto setup-turtles
% o- \8 {) U6 H+ X; D9 i create-turtles 100
# X8 I- n1 G) t2 H# r, M0 e. o3 a# x ask turtles [ setxy random-xcor random-ycor ]
- Y) y3 i& e; H8 R$ @$ ~# O8 Qend
* A# \7 q8 I' z* O4 zto eat-grass; U. V7 w5 b8 { v" J$ E" I
ask turtles [
! h4 [$ u. L+ O/ I) W+ v# @; ? if pcolor = green [6 x$ Q6 n2 `4 o6 w0 @; e
set pcolor black
r+ s/ R6 n2 _- A set energy (energy + 10)
( C( C& F) X5 z7 O, ~5 b( K6 h ]* }# G& o9 Q: W2 V6 x+ D3 r p0 Z
ifelse show-energy?& \1 \; |( g, T, Q" S7 D' k; |; w, g
[ set label energy ]
7 J: Q0 R" S; V& n/ c' Y+ I# G- w [ set label "" ]7 T; Q# Y# b( ~1 O. j
]( v2 j2 F( U, X8 o
end
: ?1 i# d% I' K# @- ~! pto reproduce
$ G7 I$ ~ e: [: {; Y ask turtles [! i: p) ^# f& x# [- p( Y
if energy > 50 [* U; R* `) A" L1 W- H B5 S
set energy energy - 50' _9 [: u) z$ \9 p) F% Y o
hatch 1 [ set energy 50 ]
7 s. `' }8 W7 d2 V: ? ]7 t$ r7 B0 }, z* G% T
]
5 r7 n7 Y# C# t0 ^end
) y9 }! a- m% K, d8 R( @7 a9 Vto check-death
6 R# X- ^ H% w" f. {$ B0 \ ask turtles [
& A) O3 e3 ]3 ]7 r% L* ?/ k if energy <= 0 [ die ]
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end# B2 |1 Q1 X9 j
to regrow-grass" w* z4 Q+ j6 V: X1 K
ask patches [
3 S+ _ B" i4 F) f if random 100 < 3 [ set pcolor green ]
/ a6 }5 j% {6 v5 h ]
8 D" ^! }5 m2 v# e, C+ a: V/ E7 [end- [7 M, e/ s$ R2 ~1 l; I% r
to do-plots. ]2 Z1 L) {& F
set-current-plot "Totals"
& ?" G5 @" ]6 P. u set-current-plot-pen "turtles"
8 V! C8 T+ T$ m plot count turtles- @7 u4 f! J2 P' x3 _7 m
set-current-plot-pen "grass") N/ v* D( v0 B/ e
plot count patches with [pcolor = green]
- i+ ]( b* N* ^0 G- Uend
2 W6 s# c: i4 J& x! ]! b) w# @; a" b可是运行时提示no such plot: "Totals"5 @9 G! @* X* d
error while observer running SET-CURRENT-PLOT
8 r9 k" V- {1 M2 A0 f* H$ U called by procedure DO-PLOTS
. b# g, p( ~$ _ F4 t- f# ?$ q called by procedure SETUP
/ Q* }; `: H* H! ^. \0 Q called by 按钮 'setup'7 _; u* I+ b& ~
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
