我编的程序如下turtles-own [energy]- l3 n" i+ [3 P6 |& a1 q
to setup' o/ q- r" l6 T9 I. P, `
clear-all! x( Q! y7 B. e0 {) Z
setup-patches0 Y# M7 Q2 k2 l( X( b+ X1 ]5 R
create-turtles 100$ N3 b2 `) l& B5 x; N
do-plots
1 S: t2 R9 R9 k# G; v: k% v ask turtles [ setxy random-xcor random-ycor ]+ p3 B# a6 i) G3 K, w/ P4 i |3 Q1 Z
end$ b4 i9 I$ g( e
to go
) Q+ V! @9 ]" z1 ?! Y move-turtles( h6 z' e8 N8 p. k* r3 G
eat-grass! r: @- z5 w: t7 W5 S5 E
reproduce
" Z' @6 B% X) ? check-death
7 A# \ q0 V! ` R, r regrow-grass |5 d4 f7 |+ O" O. e6 }( ?0 g
do-plots
! M: f. Q' e) w" e9 V( b$ ? Cend) G8 Z( }0 O5 G4 q6 O& P
to move-turtles
8 q" L' k \( Z; s, b. W ask turtles [
8 }, k1 P2 ~- \" U9 g d, ~ right random 360 [7 S' p: N" S% Q" u* o% H
forward 11 T5 V; C# H. o2 A; |
set energy energy - 1
+ h+ T7 Z% M3 q4 Q ]
# [( v; W: w' p! j$ i0 Pend
. m* v8 ?0 z! a( H# X) V( Hto setup-patches
1 P3 j& u5 J1 ~ ask patches [ set pcolor green ]1 B4 I0 j" f8 `6 `2 @$ q
end
9 V$ h: B( ?5 D9 j+ Oto setup-turtles
/ ?9 r& Y2 P1 J/ s5 p* m! { create-turtles 100
" X$ a% L9 m, H! q ask turtles [ setxy random-xcor random-ycor ]
+ d5 Z$ i) M9 E! R& cend
; e% ]; w7 A; ?) K, Mto eat-grass' U# ?( M X# Y7 r' s
ask turtles [: R6 W1 i: E7 K, r- B
if pcolor = green [" d9 Q% s* K# f
set pcolor black9 l; c! M% z- x2 t
set energy (energy + 10)
6 x* s y. G( K# e, ]0 J2 A ]
( m# ?$ O( M8 O' N3 f8 Z ifelse show-energy?
$ y7 l8 I/ Z5 l/ ]" s4 R [ set label energy ]0 t( |% z! v' u. c
[ set label "" ]
' u7 c( C: v- X4 y3 M2 F) S ]$ q2 ?6 f) g; ?
end
+ V" y A" N% _/ Y( [ I ^to reproduce
! G# d/ l1 s8 s% F ask turtles [
) w% f' v% M3 E$ D y; l if energy > 50 [4 K& x1 U P1 [. ?# S0 B
set energy energy - 50
: Q6 T8 V8 k \ hatch 1 [ set energy 50 ]9 U& r8 H* Q0 v+ I/ L4 P: [8 ?5 b8 Q
]
# a% `9 F/ t2 T2 W* `3 [ ]
s7 m9 K8 |1 V8 M7 a' q1 zend
8 o w$ A6 h7 l" B' _& [$ D0 Nto check-death: P) u/ g: o8 G/ o
ask turtles [
5 q% ]# f( J- E) o; S' H$ D" x# p5 @ if energy <= 0 [ die ]
' S+ O% t# Y- N U" b& p$ P ]; t+ i) U" e: }- W
end3 p" I5 L9 q' u
to regrow-grass
9 `; k5 `' l) b. p" c+ \ ask patches [
9 A' G! d; |# f if random 100 < 3 [ set pcolor green ]
+ n' S1 {% a! J; T, k ]) }4 D% I- B; z B9 e# ]0 y
end
0 m$ b2 h, M9 o' S% Fto do-plots0 f8 P$ k- r- t1 E, H1 V
set-current-plot "Totals"
5 s3 a* _! h9 M: s0 [ set-current-plot-pen "turtles"
: n$ f* v2 }& q1 s0 c plot count turtles
5 V' m C2 f( G- J% h set-current-plot-pen "grass"7 \+ d2 ~8 \; x# t, T
plot count patches with [pcolor = green]
* L. a) X" d/ n- mend
- ?3 d" f/ S# _可是运行时提示no such plot: "Totals"& x* A& u( d$ O
error while observer running SET-CURRENT-PLOT' p9 n; F0 {8 K7 l5 q: q& {7 Z( ~
called by procedure DO-PLOTS* h" e& t! U4 `0 k4 v
called by procedure SETUP
" D3 r8 T2 [* X/ W. g called by 按钮 'setup'
V: e0 z7 _4 x1 m! T" x) m求大神解答啊 |