我编的程序如下turtles-own [energy]
# D+ T3 ]% _8 u% x1 G" ]$ }' m, Eto setup
( _& ~0 {) {8 V9 P' m/ d clear-all* z" F7 _: H" ]2 n6 H- `
setup-patches
2 a& _# M" h7 a5 [+ V y: _3 j create-turtles 1009 A7 \: p3 ], u& [' o
do-plots
5 o4 \) f' c% X ask turtles [ setxy random-xcor random-ycor ]
5 O* |% K6 Q% t6 Xend
' ?, l7 a: D, \! I9 V/ |to go
N" N5 d$ C" Z% T; i move-turtles% J2 \% P: ]7 w- T9 D. A
eat-grass
" J. [9 `- P9 J9 X, }9 F/ M reproduce
' Q; }* _% R6 j5 w5 y! C& t9 } check-death/ f) e2 s" W/ g) d
regrow-grass
0 [( T P. x+ Z7 ^* [% |/ l do-plots4 I7 q* }4 p* s
end
1 \' A5 r! Z7 i: t* ~& \6 Vto move-turtles
" m0 y) `# w& ~ ask turtles [
( b6 ~, \/ O7 g! A9 k4 l" U# u9 j0 L right random 360
. A+ c( p, G: g forward 1
g- m& m& K' ~7 P! T: V4 s N; q8 ?" E set energy energy - 1- Q# j( y+ K/ ]! I- r
]
, |' M5 l7 J) {; S* d* Tend, _) H; w% B/ E5 U# d4 B
to setup-patches
/ w* ?& N) ^# R% Y% U ask patches [ set pcolor green ]7 h6 z$ M# s9 A% O+ i1 N3 t- U
end; V' P! D- e$ m) T& }
to setup-turtles
) j6 d1 r5 l2 p create-turtles 100& B) G- }0 j9 U/ r0 ~
ask turtles [ setxy random-xcor random-ycor ]! c- |2 K9 Q+ P7 ?# |: c
end
. [+ Q" ]- W1 O5 J5 n" u, e- e! bto eat-grass
0 h% r- c: h c' ^& x# W* m" X+ X ask turtles [1 C* ~* ` H2 ]
if pcolor = green [$ k/ p+ {% c; c' K8 {4 A- t
set pcolor black
b! m$ f8 I0 c2 Q set energy (energy + 10)
+ N% U v. M+ {" l6 { ]* f0 B; _* @/ d# ^5 `$ v
ifelse show-energy?
) t0 D: X- f( ^* S0 V- B/ S [ set label energy ]
0 A; t1 D |1 m! {, Q& { [ set label "" ]
& U" y5 v" p. z/ A9 a ]8 C( J. |4 i2 `- T8 R a1 `8 l: X
end3 `5 a& v3 q5 E
to reproduce. L) o8 }2 x) l7 A- _9 w
ask turtles [5 C" @" G' j! v
if energy > 50 [7 \6 M _4 w! ?& X( w
set energy energy - 50' R! W( I; Z1 Q5 F& t4 L
hatch 1 [ set energy 50 ]
+ J) l# P/ d+ {1 ~6 G8 d k ]. O7 }! r5 L$ [6 M2 o1 H$ n% C m
]
X, \# E: U( E/ Qend0 P( C: A8 t, o
to check-death8 q( x- A; e6 b4 L# U. G8 E+ K4 n
ask turtles [7 c; x! M/ y* N; r o1 w
if energy <= 0 [ die ]
4 F9 G1 O5 G6 h1 C$ L: Q ]2 |/ S: H5 O |2 f7 X g
end
6 q3 Q' _% j8 y7 Q* r7 g$ Rto regrow-grass
# r3 S3 {& r* f7 j- V* K! ~ ask patches [
1 ?, {+ W) E+ ^3 Y+ ?# w: { if random 100 < 3 [ set pcolor green ]8 y' s" j1 ~" D6 u8 F
]1 H; b/ G9 U' R7 h: w% Y
end6 d4 w% c% M% p+ Q
to do-plots
6 o0 g& d3 k4 Z3 M; }4 \% T set-current-plot "Totals"
2 `( I2 {% ~3 x; s7 c! q0 I set-current-plot-pen "turtles", L7 [0 F. ^* C4 u* y
plot count turtles3 [7 G7 i7 f; e2 ~
set-current-plot-pen "grass"- |) ?0 `7 `' X7 a( N
plot count patches with [pcolor = green]
6 s" M! z- p# l# s) ~. mend/ @- X6 x( t/ E5 o$ t- p& R
可是运行时提示no such plot: "Totals"
& Y' D3 N6 \' J; |* rerror while observer running SET-CURRENT-PLOT; \6 F. c0 U( w+ E: R
called by procedure DO-PLOTS# W1 C: S+ i( |, Z3 N# l
called by procedure SETUP4 `6 Y0 A3 o8 K$ u3 _1 ~
called by 按钮 'setup'
# B& ]0 w E6 I求大神解答啊 |