我编的程序如下turtles-own [energy]; Q/ @5 `% G4 y& W
to setup
5 T- A* Y* R1 B2 l% N$ `8 F clear-all. u1 H3 A8 d( a
setup-patches
8 x$ i4 ?+ k6 C+ S" I3 u E* i$ | create-turtles 1002 i2 s. F# B8 A$ P C
do-plots _$ J. r/ s) J5 Q
ask turtles [ setxy random-xcor random-ycor ]0 J& m) t" q a
end
2 H! F" t$ R$ y7 K3 ~to go
" ~9 P5 ?& N2 i' X0 o$ Q# l move-turtles
: |% Q# d! D. S eat-grass
5 F4 p# K7 M5 r7 P" K6 \2 j6 @! ? reproduce
, V3 r5 f9 k5 V) b7 W check-death
/ J0 H8 H& A7 J8 K! f9 H! Y9 e7 k7 M regrow-grass+ V2 v0 V& o* i6 {
do-plots
6 ^( w, b: D3 N9 @; G; a2 Qend
; L2 n+ |* e, X+ R- {+ wto move-turtles
$ n9 d( ~- J: A9 S. W ask turtles [6 N- `: t1 O2 {2 k8 R( T
right random 360
! i8 \" c8 K: Z) V4 s7 t/ @ forward 1
! l1 M: H. C' D0 u& c# S) @* q: d set energy energy - 1
8 u" P4 T& L7 C% k* R ]) y+ ]1 D# i8 ^: o( S
end, B) ?& c+ Z0 q _0 P2 ?
to setup-patches7 o' f6 j+ s8 X4 \. Q# V& c
ask patches [ set pcolor green ]
+ h3 }4 d% _+ G0 vend
; B/ D: _/ e; x; f+ W+ oto setup-turtles
) S- q( o# h! x/ T* V create-turtles 100
e7 l, Y8 b7 N6 ? ask turtles [ setxy random-xcor random-ycor ]
% j1 A+ U( q0 T/ z) a$ `4 bend9 P7 h" C/ Y& O: Z4 s# j
to eat-grass
- j% t6 v' u ?% _ ask turtles [
3 e( B6 F/ S( E s$ {" F1 e if pcolor = green [5 ^: O$ U6 f1 r: O
set pcolor black
2 @; K7 b0 b& Z' }/ K% D set energy (energy + 10), ~$ v9 O. A( g
]1 a/ j' ]7 A" G: L! r
ifelse show-energy?3 v7 ^/ n0 U, b# V
[ set label energy ]
& ?7 A1 n+ b- v+ t [ set label "" ]
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end
# e D- o8 K! Y. @% y2 Cto reproduce
, G" |* N9 M" J0 C ask turtles [
9 u) }" i; N. W p$ U7 L" i$ S, v5 K if energy > 50 [1 q3 \6 H2 ~- z
set energy energy - 50
9 N/ X7 ]6 y8 k7 z9 f; O hatch 1 [ set energy 50 ]
/ S' J1 J g& q7 k. c$ V( a ]
3 ^$ B; H: y2 Q: C( h ]
" D7 F! U) t* [3 A N; G dend
! [% e2 H2 D( d+ zto check-death
' m8 X Q! n: k% N- _6 j( v ask turtles [. T8 w% C# k( p! Z. w5 V
if energy <= 0 [ die ]
- z+ R* @0 D- a' [/ L5 f* ^ ]
" |# }) l0 H' G' Y' p, g0 [9 Pend
/ N+ C1 z& f" O9 g" V0 D& Y5 vto regrow-grass
7 Q1 j% @. O1 Q, ` ask patches [
) j0 v, i: j3 k! |: X' G/ c/ @ if random 100 < 3 [ set pcolor green ]
; r. z6 [/ F7 \7 ?/ [0 m ]- t; d" U* _% e# z% E
end
2 J% q2 M+ b& G1 [to do-plots7 M7 R4 ^+ ] n% T4 U7 F" q
set-current-plot "Totals"( [) G% _+ w# i
set-current-plot-pen "turtles"& i& w1 B' e4 K8 X" v* W% \
plot count turtles
9 E7 x2 l9 q$ D) m set-current-plot-pen "grass"
( [* N' m" M/ Z- X* a9 c) i plot count patches with [pcolor = green]$ O$ V/ g7 c- z
end
$ }& q$ }; H# r6 [可是运行时提示no such plot: "Totals", I+ {! h1 _7 L' ]( G
error while observer running SET-CURRENT-PLOT
, f; s6 |: ]3 i called by procedure DO-PLOTS r1 e* b/ K' p5 M0 ~
called by procedure SETUP# h! N; {4 ?6 _; \' {
called by 按钮 'setup'1 x; R* c4 m: ]
求大神解答啊 |