我编的程序如下turtles-own [energy]
) o% `' o- ^7 O' j0 b2 K1 \4 r& _1 zto setup
+ Z! _; @; Z/ E7 ~( N clear-all2 u% z; I8 L! E& g' l
setup-patches" r; G& `0 u4 i7 y: |0 v
create-turtles 100
4 j# ^2 [4 H- |, L do-plots
! H5 i8 g6 M/ @# T( c ask turtles [ setxy random-xcor random-ycor ]( L g9 c0 B# Y! Y4 H
end6 N9 O. A' X8 |
to go5 s, z& b9 l: ~4 y# e6 d
move-turtles9 k; ~ i1 `2 E& l4 B% Z% p2 f& u
eat-grass7 P/ m" n1 b, q \4 m, E) _- ]
reproduce
& X' M: M; u9 s* n6 k check-death
2 z9 o( ~; ~ J" i6 p- A regrow-grass
( s, _8 j- U y/ Z1 G. K0 D do-plots
7 k) Z5 M& s' B, ~1 zend
$ L3 ]' Z# D: W" a: @' w6 Hto move-turtles) o9 V6 y* p- t& B# a" r6 L
ask turtles [/ p4 q" ]8 q; e( v! f5 l
right random 360
9 ~2 ~8 p6 d: V. u1 w/ { forward 1
6 O' y* B# z- g set energy energy - 1+ ^8 a' p9 {/ t) D
]7 P( }3 D2 K! _; n8 A2 n
end6 z1 ^( K' z! a) e
to setup-patches
" l2 b6 f( ]. M5 f5 X ask patches [ set pcolor green ]- h1 g2 ]6 E7 Q+ a
end
8 ~/ n5 u9 ~8 l: u& P; bto setup-turtles
" t& T+ X# K* Q' p4 S u" U create-turtles 100/ ^, a6 ~; [* [" P( s% v- X
ask turtles [ setxy random-xcor random-ycor ]
( R' n8 [8 V; a- F) V, Iend
9 ~+ L2 Q, c% H- yto eat-grass
) C4 M- ] e. Q) A) a ask turtles [
) q2 k) {1 j- t* l" c& p. U if pcolor = green [
- w7 `6 k+ y( f3 L* M set pcolor black
% d* d2 S8 x( Z; v$ Z set energy (energy + 10)* H6 G& R+ Z: C: A7 n5 h
]) C/ C; c$ E7 Y: x) o: c
ifelse show-energy?
$ }7 |6 Q5 D+ G) b& F9 D/ y6 E [ set label energy ]7 E$ Y; ~% o# P/ p! Q
[ set label "" ]6 J6 b3 i2 Z: O; f* _0 B
]' T2 ]4 w' z$ M4 e1 ~8 S+ M
end) M% k' T# Q) L' |0 L
to reproduce+ Q9 e. D4 h o5 @. Y
ask turtles [) Y. J0 V0 R+ M: G6 i3 X; ?9 D
if energy > 50 [1 N) [2 w& T2 c4 Y0 B7 d$ D
set energy energy - 50: q+ W6 }- L9 b- K+ t3 c9 n
hatch 1 [ set energy 50 ]4 [; \6 x4 S. p# ]8 S
]
0 ^; @+ ^: U; f& B' X- y9 T ]% q! ?1 t" t K% _. h9 p
end) t- `7 F. a* {- N$ ]
to check-death2 n" B! \) \/ \5 x* T2 F7 o
ask turtles [3 m" Q @/ M0 ^2 u3 b6 u
if energy <= 0 [ die ]
1 K9 Y# R m+ f1 y2 @ ]6 S) M9 X+ N# G9 k% A5 k4 o M) Z
end6 c' J8 _& _4 U8 F9 r' }/ O! P0 u4 \
to regrow-grass
3 e4 |6 g5 {$ T0 E( n5 l( E. Q# Q8 O ask patches [. c# h& B+ G, S" D f: C
if random 100 < 3 [ set pcolor green ]
* I8 a1 P# S) D$ }. e- d ]( S7 ^7 f( }; m4 ~
end+ _* U0 o" `( J% T h' |) S9 z: S! q
to do-plots' z, S$ R6 l6 C3 d% J
set-current-plot "Totals"* v$ s# E2 S! T' i, [7 c5 f+ u
set-current-plot-pen "turtles"& X' P c! N3 S
plot count turtles
/ D! @1 d# [' @5 u/ `$ N! S. y set-current-plot-pen "grass"
9 L) A3 R8 d, \' i: G5 h9 W" { plot count patches with [pcolor = green]# c8 J( x6 z9 V4 V
end; ?* A6 U0 z. r, S) R2 z* O
可是运行时提示no such plot: "Totals"
* g, E" P2 e' x3 K$ \3 S9 r& v- b* U2 berror while observer running SET-CURRENT-PLOT0 O9 E& o6 h3 e* m0 d! S
called by procedure DO-PLOTS
. V6 W1 w3 }# f! a# g called by procedure SETUP
: ]) G7 g2 ]- v* o) \5 c8 J/ c called by 按钮 'setup') a/ ~3 J5 J8 O5 t n
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
