我编的程序如下turtles-own [energy]
& {; E9 }: N: T' ?to setup
2 \8 l I: Q: U% C clear-all
/ w4 t. g$ ^ X* V. E2 K setup-patches
& Y" q/ i1 K$ R } create-turtles 1005 i4 z. z- r, Z- ?
do-plots& C5 S# p, q) ]3 A0 ^- H
ask turtles [ setxy random-xcor random-ycor ]( \( \9 e* `2 d
end$ _' I% _. C/ }) z# K' H
to go
$ Y7 H6 s+ l0 H! n. u move-turtles
) I" S! _, j& s: A7 g+ v. K eat-grass
/ j5 X d+ N3 d) n& A reproduce- g7 d0 ~' D- r3 v9 m, t3 D
check-death
\: F5 C/ R) L* e. `, \5 V* D3 H regrow-grass5 r7 l6 E. z7 Y. {. T: G8 \: h9 m
do-plots
5 ?3 }7 X. o# \7 K% |end
* d5 V4 h2 Z. g) ato move-turtles+ @7 t5 q) \6 d/ A* g m% U* o
ask turtles [2 g+ x+ I% y* s
right random 360
: h, Q7 m7 D7 Z' r) s4 R forward 1
# i/ x1 ] r! F. p8 l set energy energy - 1. o1 c: e0 B0 S- e# p. ]( X) w
]
: i$ I/ `/ o$ _- d( uend/ g$ v2 ?$ v4 a
to setup-patches
3 E$ n2 X |2 a& v. I9 }* R ask patches [ set pcolor green ]+ V5 B7 i7 a- M8 ?
end
& z0 Z1 D0 M& j- w. r, `+ Zto setup-turtles
/ U) |& S; m" N create-turtles 100: N( P+ I3 C$ J n- f+ i! E2 D
ask turtles [ setxy random-xcor random-ycor ]2 J! @. E, ]- |3 Y' v
end. l" b6 L; b* X2 k/ o
to eat-grass/ B% a6 z. b+ [0 Z* b; Z" ?
ask turtles [( I3 F I* |; {% P; J
if pcolor = green [
) g" \2 n: L, K4 ]' z7 O" ?$ |- n set pcolor black: W; N* K+ h7 {" j5 Y: d% y3 P6 ]
set energy (energy + 10)$ \. s! A! e% e, d
], E2 S# W, \8 G0 w* |8 K
ifelse show-energy?9 U1 ] P& H# a4 F# j5 j
[ set label energy ]
% v; G+ a9 N# Q0 Q6 E! T4 I3 V [ set label "" ]
9 i! H1 r C% k/ T ]! [ L0 h- p4 d$ |
end
7 B6 r+ _1 @5 g6 R. k2 w1 Sto reproduce
; ^+ c( v3 c9 ` ask turtles [. [( w* m; Q9 p, p& R
if energy > 50 [
; c* b. a1 l0 p D# ~6 Z$ A( W8 ` set energy energy - 50
0 ]* c4 i1 _) x' ~3 S; c8 v hatch 1 [ set energy 50 ]
; [/ }+ V2 ?9 J ]
7 h" d1 r# o% s8 g' g( M) G ]
) y: Q! U; b$ a7 X0 x1 ?! Uend
4 L& }1 ?* [" W6 h# yto check-death) \2 k' P- t" n3 v! z
ask turtles [0 Y: O9 c3 V- K3 J' x+ @, n0 P1 _
if energy <= 0 [ die ]/ w. i) U, e) J; J
]5 J6 L! h9 f4 G6 v- K U1 D+ @
end
. `# n3 ~# s' W. q/ l: M! \7 Qto regrow-grass, ~. r6 A) u3 H
ask patches [) H+ \8 B/ w* }8 Q; _
if random 100 < 3 [ set pcolor green ]
* ` l% C; x, `9 U* B0 E: j, _5 L8 P ]! B+ e1 G5 F0 ~8 Z
end
' ]- [) H0 `: _/ Q% V- hto do-plots* `/ U6 r7 h1 i: l
set-current-plot "Totals"
4 B0 x( \7 s6 T5 x5 u3 L6 @. v0 @2 R4 e set-current-plot-pen "turtles"+ T7 N' e6 t# y0 ~. F# z) r* i# d# T
plot count turtles I: F$ Q* I$ K& ~' E' r
set-current-plot-pen "grass"
1 z& d- D& P* _/ q) M; c plot count patches with [pcolor = green]
* a& _: X! P# i5 ^) s( r5 u& iend L3 y7 J: [& w) s4 Z* M
可是运行时提示no such plot: "Totals"
) b% F1 O4 v( c2 qerror while observer running SET-CURRENT-PLOT
) \) j7 {' h/ t* s. g called by procedure DO-PLOTS( A% ~: L, J2 ]
called by procedure SETUP( p" v- l) W" P8 A8 [; S+ l' g0 b
called by 按钮 'setup'. K5 v! E2 E1 D+ u5 g
求大神解答啊 |
[复制链接]
楼主
发表于 2013-5-29 00:25:38
