我编的程序如下turtles-own [energy]( u; [$ {- E& U9 ^
to setup
8 ?7 ^2 ]; V' l2 z clear-all
% c; @/ |1 L: \9 k' O setup-patches! N( q& C5 U( ^" e, t
create-turtles 100
" m" W- x, \& {/ E J Y! { do-plots" H3 V! i! l7 s; Z! P X, o; |
ask turtles [ setxy random-xcor random-ycor ]1 |5 n" V. B2 ~. b. _) ^
end+ m6 A2 x, Y: K* z- Q1 g
to go
$ Y- H. |0 ~7 y" P7 K/ a move-turtles
# w9 z1 j' c& V7 k4 d9 l eat-grass
8 x1 |9 R' F5 Q/ b$ @ reproduce1 i% @* T3 A! Q' b7 K1 P: t
check-death" S" u/ F9 s: ]" E) l" \6 p
regrow-grass
' f0 d: u! n" b! B/ \" k6 ~ do-plots
! p; p- R$ e) l! Q1 w( [' _! wend# ]4 A/ o8 m7 Q2 O" A7 q8 `3 n
to move-turtles1 }% d/ ]* [0 M- `' F' Y
ask turtles [
' `6 r$ h- u" y! p9 A/ G+ }9 i right random 360
$ B# c0 V3 ?( H forward 1' {6 W1 \2 f5 F% S
set energy energy - 1
) w/ E X: P3 N" a, Z8 p% K6 o' J ]
0 M8 Z G( c, ]0 c8 N! }, `5 I+ xend
2 I* `4 `% ~- U+ gto setup-patches
3 k: v8 i2 `+ g2 b1 U ask patches [ set pcolor green ]# ?; O0 ]2 p7 P2 n- {$ z- c( j/ |
end! [: A3 d1 B0 t& f
to setup-turtles9 y8 Z& {, {0 [; v
create-turtles 100
$ n5 I6 I' y/ g0 L! g" E% w2 O ask turtles [ setxy random-xcor random-ycor ]+ K9 F- g# F. V7 g8 G1 z
end
5 K& X2 }# p' z4 D/ `8 l7 Hto eat-grass
" _1 d7 q) V- h7 y8 G- V" C% j5 u& {: A ask turtles [" y# P" l" k$ _1 ?8 C9 z
if pcolor = green [7 D. s8 v( b$ S
set pcolor black
+ i L( t0 D' G. Z( P" [ set energy (energy + 10)6 `: G! K) c7 u( C' a1 G# i. i
]
& i; S S2 I8 _) n& P1 L- n ifelse show-energy?
d% A, @- z0 o" X e" L; j( p3 o8 N [ set label energy ]* E% B0 L' N! D" V' }
[ set label "" ]) B: J) Q# u; q1 y6 i$ L
]
, J0 N* S( v& W: Y. Zend' w% c5 d$ I/ |+ B4 x: ?
to reproduce4 u; e* y. g) F! m" p
ask turtles [* n W, u6 b" f! k
if energy > 50 [
: {: x8 ~, ^# S) I X/ A set energy energy - 50
2 P2 L: m2 k- P; l& \+ T" v7 O hatch 1 [ set energy 50 ]6 g5 S$ b9 e8 ~8 b; S
]
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end
6 l" d# }( ^' l- b$ kto check-death
# w( p5 t# P% D5 v ask turtles [
( q. Q+ T, q) Y& s1 l* J9 Y" a if energy <= 0 [ die ]2 u" X/ m7 j) v) o, K) ]. c& Q
]
3 ?1 t/ K7 ^# k' ^# Zend
5 s4 q3 ~4 }' h% U2 @to regrow-grass
* J4 d. Q" W( }4 R ask patches [
3 O- v% c5 C$ M if random 100 < 3 [ set pcolor green ]' @8 B2 T! R( \
]
' B$ q6 k9 Y9 V) _. v! x9 N) Nend
. y) e7 B7 P4 I% m( `- Rto do-plots
8 p$ U g$ u( I" r. z: l: o: s! }0 a set-current-plot "Totals", t$ {! s$ m ?
set-current-plot-pen "turtles"
! a' Y0 `4 U3 X8 \ plot count turtles
9 u; M4 d# m3 V0 \- g set-current-plot-pen "grass"3 Y/ |# j$ G& ^% W" J6 i9 o
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"
) A: G, r) c8 Ferror while observer running SET-CURRENT-PLOT7 Q9 ^- a8 R( {$ c1 _7 s
called by procedure DO-PLOTS; ]. }( U) @" [
called by procedure SETUP
: z1 t5 w8 t" J) G# ^/ K( R called by 按钮 'setup'
) T- u( O' k$ A. R/ c& v, F求大神解答啊 |