我编的程序如下turtles-own [energy]" ^$ Y6 X* r: o
to setup Y" t1 G8 [, A7 {3 ~$ z7 ?
clear-all
6 O6 u2 @; t" ] setup-patches
$ G$ `+ r! e8 U. G- }' I create-turtles 100
, c' P6 l2 l6 a& x, h do-plots
1 v8 X! @8 Z" [/ P6 }8 W; }/ Z6 K ask turtles [ setxy random-xcor random-ycor ]0 [ ?! }. y. k5 n/ l
end7 m8 H F" i- Y* U8 I# Z( K" D& q
to go
) V: Z! S( o0 v move-turtles
8 S4 q. y, U$ a4 h& n eat-grass# M' T& ?- B7 J$ e
reproduce
- P6 r4 G1 t2 |9 U9 ?. [ check-death
7 u7 a& M7 t! L2 w; r. _+ t2 o6 T regrow-grass! y- x& ~4 a6 f. g! X& T3 M5 C
do-plots
% K, ^# t$ G6 P7 c; T _end8 j$ | h% T: x9 ~/ o0 k# {3 B
to move-turtles
/ K, y( U) E7 E& L) d ask turtles [
, T1 w1 n9 A" l% G8 S; O3 r/ E right random 360
( z1 q5 `) z$ c4 a% [ forward 12 u& h3 G5 q: g! K: m) l/ p
set energy energy - 1) s4 k$ p; @* I& _
]! p8 `% ~7 [6 A, z
end
* F' b L v5 dto setup-patches8 m' o0 c( b4 }1 L0 R
ask patches [ set pcolor green ]
* N6 q+ K; u; Gend
* {& _) ?! ^/ \8 c; ~7 |) i3 V* Sto setup-turtles
( c# ^1 ^ B0 V. W2 U create-turtles 100
; O4 m7 p' @; ~0 I1 v, {* w ask turtles [ setxy random-xcor random-ycor ]6 ?* ~* w8 ~/ j6 Y5 \- ~
end
: a4 g# G8 R; g4 g& I' Z! j/ f! Vto eat-grass% e. x$ {& ~# H8 D% `& h: L; O" d
ask turtles [
# g5 l3 ^3 @& T5 G" `1 K if pcolor = green [
* M0 k* `8 U/ @, P, B$ P set pcolor black1 ]5 G4 ]8 V% a* G/ Z8 h# _6 G
set energy (energy + 10)
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ifelse show-energy?/ K: R7 y8 G* P2 G
[ set label energy ]
3 f& W( V7 J% w1 A [ set label "" ]
" l9 r5 C: E- J ]
2 B8 d- E( L% B) ^) q Q$ J5 Z& ?- _end4 V) D7 w7 i) A+ M' N
to reproduce
6 l o' S) t$ h6 j# s. @ ask turtles [
/ g; i: B( b R' V- X if energy > 50 [2 S9 ~/ X- [0 I l) l
set energy energy - 50
+ z( x9 R7 z! t9 {: w9 s h1 m hatch 1 [ set energy 50 ]
% y" K2 g! |" k9 l ]5 I) D! c6 x, o% F
]* E- r9 I) o: O9 W }
end+ y1 h( i. C, Z3 T7 n
to check-death _+ D! ^- U5 e; S* F G: W* E
ask turtles [, z: `2 K2 \! z! B- ?) a
if energy <= 0 [ die ]2 Q8 I7 |6 K, H6 U6 o7 ]: J
]# e7 q M' ?4 Y+ ^; r' {
end
# @4 v! B' E+ f/ c; H* wto regrow-grass8 V, Z! R5 [! t% C+ W
ask patches [
/ u: Q. f2 J8 A if random 100 < 3 [ set pcolor green ]- A% J: N7 }( L! W
]
5 X6 Y8 A) B8 d4 D$ {end0 N. i( i9 [" f% `! A* g6 V) \
to do-plots% Y4 q# Q1 o, c0 O, [ \6 Q
set-current-plot "Totals" s2 s6 \' F! D+ Q
set-current-plot-pen "turtles"
( Z% _- K1 N) d) e! }5 I" p plot count turtles
D& E) D# W4 E) s$ _# ?1 r set-current-plot-pen "grass"( ]" k5 n$ u' e/ \# g r
plot count patches with [pcolor = green]; Z u. b' _/ i7 i1 q' h/ r
end8 o$ J/ S* e9 F6 z$ L
可是运行时提示no such plot: "Totals"; l0 F5 a3 d, @( F8 a9 d
error while observer running SET-CURRENT-PLOT
$ p) r; k* a1 f( h3 { called by procedure DO-PLOTS
8 I) M. k& q8 ?$ I3 F called by procedure SETUP T$ V' v0 p; v* j0 E+ R6 k
called by 按钮 'setup'
" Z8 s0 a& d1 a+ I8 u, y& v) B求大神解答啊 |