我编的程序如下turtles-own [energy] Y1 f" K) F) g: d6 G
to setup
) B& T/ Z5 r6 l" [ clear-all
3 d2 _/ }8 Y4 v. h! ~& C setup-patches
- _0 `6 Q# w$ S! z- a4 O create-turtles 100
" W. u1 c) x; R do-plots) @1 b; f! z. W/ U" f
ask turtles [ setxy random-xcor random-ycor ]
; r7 T, H, D& h' \end
, v; K, U. y* \+ bto go
6 V+ I/ `+ `) A' y: { U move-turtles
3 B; k& M: w4 P# E( x6 R' a eat-grass
) x1 @' e1 i% ? reproduce
1 X- I8 `+ q. Y( _ p: y check-death
1 i/ }& K& a& i. y) l: S, O E regrow-grass2 @" H3 c, j1 Z0 _
do-plots
; u `8 D! z- }. V1 J5 Wend
) T. j0 a! I- c! Wto move-turtles
/ u; i @( w0 f" i/ t8 f$ P O ask turtles [
- y0 {# Q2 d/ w; j right random 360
3 T/ N, Z8 q1 [8 U2 V forward 1! h8 ^7 v; k+ r
set energy energy - 1
7 s. t; n X9 Q7 s& Y7 {: M ]+ p9 _# c, l6 k: A7 f- P8 R
end
1 V; q X; Q: k: d" Sto setup-patches
. L( X/ h, v- V' M& B ask patches [ set pcolor green ]0 b! p/ ?4 `' X/ U$ |: A d
end
0 y& |/ U2 ]: gto setup-turtles5 L6 X( G9 |- z# Z+ a! k
create-turtles 100
% f$ Q0 ^; @' K5 B& d/ \ ask turtles [ setxy random-xcor random-ycor ]
; k6 p2 I- Z) L, fend
. d/ i: a% @3 cto eat-grass
" ^4 y& e y: } d0 T0 P ask turtles [3 ?& t9 T/ q; [1 @2 R# E
if pcolor = green [3 v' u E- K3 u; p( P! u8 ^
set pcolor black
, F7 B; b! l& M' U: C set energy (energy + 10)% [3 ]; u* ?' J- m! o
]
$ [7 Y- x9 d$ r0 J( k ifelse show-energy?5 x$ z# i+ O9 b$ x5 }
[ set label energy ]# ?5 J0 g2 e$ a
[ set label "" ]" ?: N7 S2 a8 K8 F& w
]% m; ?# g# s6 h/ u6 _6 }
end* ~1 O! t6 g+ ?) n1 O) X
to reproduce
, C2 e* w' F8 ] ask turtles [* \) ~8 ?8 W0 c+ m
if energy > 50 [
. J3 g0 B1 l! c5 P8 P' C2 h& I set energy energy - 50& r( C* o$ g+ a* T/ V9 ^
hatch 1 [ set energy 50 ]
. M2 Y" n" O, W ]) i/ B2 t: X6 c% l! f
]9 T/ j, Z3 l+ X
end
# f/ y) z; `& y; ~0 Fto check-death6 |0 R: J0 I z( h
ask turtles [
+ w+ b" w! F# g; `8 j* P if energy <= 0 [ die ]
$ y- _8 o1 I3 g ]" C `* f1 C* a: p
end7 e- u* O/ ^9 m; `
to regrow-grass7 L5 ~3 M9 {6 ?4 D5 E3 g, r
ask patches [
- U% l! K4 A# G4 B$ B if random 100 < 3 [ set pcolor green ]) b+ ~2 W1 o0 X9 Q% }
]8 ~9 k; p/ P3 z$ A/ u0 T) [
end
2 r6 t: n$ |; `to do-plots5 D8 U7 k% R/ ]8 `( l2 W; t$ f
set-current-plot "Totals"
0 L5 V8 z0 y0 o set-current-plot-pen "turtles"
) P+ L( D) I5 B% Q# x- [, T2 `% K* | plot count turtles
7 x& Q, R0 f! Z set-current-plot-pen "grass"
9 f+ m7 h' X% b plot count patches with [pcolor = green]
/ J7 g, |7 R# Q% {+ kend9 Y5 F, q, G, E3 j
可是运行时提示no such plot: "Totals"
0 X0 z4 a L" d" I: ]error while observer running SET-CURRENT-PLOT9 Z" W! }! i. B0 H* U0 G* \
called by procedure DO-PLOTS
) e, U5 q- h x! D called by procedure SETUP
0 X! Q- N" U+ R: M1 g3 |0 Z called by 按钮 'setup'& `1 ]1 |6 ]% d L7 N
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
