我编的程序如下turtles-own [energy] g$ U3 a& \4 X3 A- {' B" a
to setup
& v' F, O8 C Q% ^4 E1 \; _" G$ u clear-all
+ g+ x4 j, C/ V$ s' o% Q& i( f! U4 g setup-patches
* P3 {$ D% F9 z* t6 v* ~4 l1 J create-turtles 100
9 r, A5 `0 R2 ^% z) Y( a do-plots
' _. `$ x l7 ^4 c+ d6 K ask turtles [ setxy random-xcor random-ycor ]
3 |8 P4 t5 S3 }0 q2 L9 Eend6 Q7 @' E# Z# ]- `
to go
3 e, W3 O5 S# V; K& b8 I! K- y: A! o move-turtles
$ w* x4 H9 g3 B& I+ r3 J eat-grass
6 l5 i5 ]4 p6 a reproduce* f! a0 X. p0 S S; z2 x
check-death
% l9 k: u) x0 N; d regrow-grass
# \1 q2 l y) [$ M. ^! N9 Y' B do-plots
0 Z! m, H; a% M9 v% P e: kend% U0 k6 k/ y( E+ {' }0 ?- d
to move-turtles
" ~9 K/ J# i0 h ask turtles [
# W1 W* r: h5 f; ] right random 360
. I, `" ~' z1 I: } n5 L& \. ^, R forward 1! O* }/ G; a2 W- Z4 P2 t; C
set energy energy - 1
! n1 J4 ?; |) ` ]
5 X: w; V; C2 i2 ` iend
4 ^* g; V- f9 qto setup-patches
: {+ c* m( I% m$ q, _8 d3 P ask patches [ set pcolor green ]5 G) B8 e5 _/ Z
end
e" n$ ^2 P p6 dto setup-turtles
4 Q, `; x. J- @8 H3 Z create-turtles 100! p: r. ?. [2 \( R( a
ask turtles [ setxy random-xcor random-ycor ]( _) P7 {# U+ Y
end
8 q& a- V5 p' N* I; E: E0 mto eat-grass
+ a3 u5 ?: Y6 Y( m ask turtles [
/ y$ Y" L! N' N7 y if pcolor = green [4 M) H. C7 E/ Q/ z- l6 X
set pcolor black/ F' g2 ` |1 _- Z& p6 F' _9 V" A
set energy (energy + 10)& L. j! P- m' t. n$ f
]
- G$ D$ j* n/ B; E4 \# O ifelse show-energy?
' E$ `1 p% R7 e9 |! P [ set label energy ]% u0 ?. t; K6 H$ l2 v. A
[ set label "" ]
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end) _+ W+ S2 J7 [: B1 {' ]
to reproduce
! X% O5 f0 L" X, L( o: R6 C1 ] ask turtles [
) I$ G7 Y+ h" H6 ]% [2 x" ? if energy > 50 [- k5 p) O% _4 x# E! c
set energy energy - 50
) t1 W* a$ B; b! V: ]2 O2 W hatch 1 [ set energy 50 ]* g. P% z+ H' `- i& q B! e
]5 I1 ~4 C% ^9 T* \( q
]
7 V0 g" y, Y( h9 tend
) f D; b+ `! A* m7 ]) h Uto check-death$ S8 h7 o' V l' n& O3 s7 m
ask turtles [! ^9 n9 Y# y- j1 G& p/ P
if energy <= 0 [ die ]" C. T+ i8 _6 a1 I$ a
], Q7 F9 G8 Q( R) [9 C+ P; ]
end) U! {7 N$ f7 i5 |, P
to regrow-grass+ E$ ?( W7 [# v$ r
ask patches [, S0 t. T# T% S+ F) A
if random 100 < 3 [ set pcolor green ]
5 p* O3 O/ U5 c& G8 Y: T ]
# ^ q0 M0 y4 j6 u5 p6 rend
1 C% S/ k) \- Nto do-plots
/ e0 }/ ^) [6 M% [5 Y4 e' q2 L set-current-plot "Totals"2 T9 W% p) }- j6 l) d
set-current-plot-pen "turtles"
$ u2 M: M1 Z, Z. r plot count turtles! D4 E4 ]( i. h! O, S; S
set-current-plot-pen "grass"& I; Z$ @, d, O3 `, `
plot count patches with [pcolor = green]
6 |+ o, G$ q( E4 rend) A9 N T5 r4 b0 p8 m/ X: l9 n; \- i
可是运行时提示no such plot: "Totals"
4 Y7 S! r. e, h3 _error while observer running SET-CURRENT-PLOT+ B5 Q2 z% A9 S! o
called by procedure DO-PLOTS6 V$ L& H# Y! W& G- V( i0 P5 m
called by procedure SETUP4 c9 d9 \2 N% K; u: I3 I1 s
called by 按钮 'setup'
0 T }; R; {% J. U* w求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
