我编的程序如下turtles-own [energy]
! N4 X9 l( L% fto setup
) x' D/ f+ t; P U$ } clear-all
) ~" L" [+ w B9 t% N setup-patches8 Q- W- \ D% u, r5 N
create-turtles 100# x" E: s9 M" g1 X P( D6 ~
do-plots& I2 j. [3 t3 S2 [/ w
ask turtles [ setxy random-xcor random-ycor ]
& o" A; x* O! ~* w& q& pend
7 D. S R8 T8 ^/ x4 R) h7 ato go6 x4 `; N: u% H* Y" D6 H
move-turtles
& t9 u+ a4 ~% M3 l) A. {3 E eat-grass# H% n' Y2 {+ F* P' W
reproduce3 A* J; r1 x& t$ @
check-death
" j* B! N6 S9 e% ^ regrow-grass
1 X0 X( S/ v0 O, n9 ^6 ]: K- H do-plots
6 C8 F' b* q1 Hend2 b. v8 G6 w, o
to move-turtles+ g( f ]! J* c- p: ? `+ t
ask turtles [
1 `7 p: s8 w2 ?7 m* g+ v right random 360
5 Z7 S: [4 a/ X* O, i- s forward 15 Z: t t1 F: E* k3 C
set energy energy - 1
L7 B1 V2 I; D1 ^: x/ D ]
# |9 {+ e1 H3 E+ i1 D& A. q6 [end
) g; t& x6 S2 [, r& d* `to setup-patches" b" x. ^ j5 G) ~% l! R# [
ask patches [ set pcolor green ]
- n2 V( P$ r) Y B; P- pend" W2 X$ \( I: j% M
to setup-turtles
, L# j9 D, y7 q1 T5 F6 F( P create-turtles 1007 Y/ T8 X9 _# m* n- C
ask turtles [ setxy random-xcor random-ycor ]
+ ^5 G Y' e, }' T0 Y$ |; M' p) Z! Uend, m8 n* W1 I+ r( C/ [( Q' |8 c
to eat-grass
1 ]5 r1 v6 A& Q* m# Z2 P7 h g ask turtles [# {7 z4 b" d" j4 @8 D, \: ?
if pcolor = green [6 {& v. f$ H0 x0 w) F9 q
set pcolor black' u8 @, V( g/ U8 k
set energy (energy + 10)
2 }1 Q+ f$ m* c1 m" W ]* J/ S; N! J+ ]2 \* Z9 {
ifelse show-energy?& k9 B" G& K) Y
[ set label energy ]
" o, @% m7 l/ r) O# N [ set label "" ]
2 o# B/ y& n1 _! Z ]
' t5 A; ^$ K, _- K9 z+ Kend5 ~' D- p$ M4 i7 q; D& x3 V
to reproduce+ b: i! _6 X0 F0 j; Y
ask turtles [( G0 O! c5 O# a2 _
if energy > 50 [1 o; r0 U% Y; i' n, f" Q4 j1 L
set energy energy - 506 q {% m7 z+ P# ]
hatch 1 [ set energy 50 ]9 Z* R1 `" d9 b6 P6 U! D$ o
]
; Y$ V3 a6 M5 u9 d& B* ?3 z# \8 I ]
! q8 _. p8 m5 N5 k2 c/ ?2 h# d/ Hend
9 m p1 c7 K6 b. b% hto check-death- k: t a1 U( I
ask turtles [$ e( f: N/ T6 ` K3 X
if energy <= 0 [ die ]7 ]! { Z. F$ h( x! u* _
]0 ~+ M2 i) R7 e) S' M6 C
end1 W( ^: c* f w2 m; i
to regrow-grass7 h$ d6 K$ }: u0 {# i
ask patches [! w P5 g6 z5 z/ E7 K; w8 s
if random 100 < 3 [ set pcolor green ]: q. t; T$ J' R* X1 v( B
]+ j! U; _1 @" l2 R% N# _! P% `
end: o9 X6 Y$ C2 O [6 j9 ^
to do-plots, u7 c& G( Y) k# B7 Y
set-current-plot "Totals"
$ P3 C5 y. ?" f: C0 j0 R. X u; D. G set-current-plot-pen "turtles"
( D8 H1 ?# }2 ?/ f plot count turtles
4 m1 D; K( h% X F8 g; a set-current-plot-pen "grass"; l8 Y( {' S. }- {
plot count patches with [pcolor = green]' [* a( k" e4 k' e7 j$ F) L: I9 M; n
end
, p% H& f. R- t4 l8 o5 E( y1 W可是运行时提示no such plot: "Totals"
, V' z) C. ^& A4 F2 p% jerror while observer running SET-CURRENT-PLOT: A5 f1 S! W; H0 t; U
called by procedure DO-PLOTS
* ]7 X9 u* n g called by procedure SETUP
) z; p0 D1 c% W( \4 e7 D- Y# o/ q called by 按钮 'setup' Q9 b) }% S+ w B
求大神解答啊 |