我编的程序如下turtles-own [energy]
9 Y) X5 c x( }+ x$ Q- pto setup
: _& R& t8 m7 B; ~ clear-all
) Z3 ^' |" M3 G) |; [6 j setup-patches
1 @+ ^& E5 ]! q* L4 p* W8 H3 K create-turtles 100* d" K) u0 p! q
do-plots; ]: @4 R1 P( J% {$ A
ask turtles [ setxy random-xcor random-ycor ]" C* s& O. e, O0 h3 ]
end3 s# v. S# f1 x+ f3 L
to go
: t% W& A$ }1 m4 N* o move-turtles2 w5 P% j0 k. v$ E. V
eat-grass
! i/ f/ J+ G* _9 ~* d reproduce6 F+ \8 b- S& G* b+ h9 d( m
check-death$ K3 R6 n: Q7 M0 e# S
regrow-grass; L6 L3 A; D3 P* Z# f- e3 G7 c3 j# X* m' ^
do-plots
2 q" J) { n$ f: Iend
7 [7 |* n# B; M" \2 ?, S; t% E/ t. Xto move-turtles
6 [& @0 @, N; a8 u ask turtles [; n8 O# T+ X- ~) p
right random 360; N7 a. H8 N; l2 w* P
forward 1- t2 i+ l7 s* H4 H# o
set energy energy - 1
: B3 ~7 B1 J! P3 u ]
2 e2 w1 P4 V2 s) Zend9 w0 ^" w7 M8 ?5 w
to setup-patches
6 @0 A5 V' Y) i* S u( C ask patches [ set pcolor green ]
! \- T! o# Q6 O/ a4 }1 Yend7 O5 q+ A7 x5 j. o
to setup-turtles
5 ]+ K: ^9 l2 N* e4 R/ g0 ]# ? create-turtles 100
* K7 U1 }% c+ R2 E3 { ask turtles [ setxy random-xcor random-ycor ]+ H2 x$ ?5 S+ a
end: g( Q) _! f) T5 K' ?+ `
to eat-grass
3 G% t8 f- }$ s0 J$ A: j7 N ask turtles [
) G* P# q( P7 Y0 z6 h( N if pcolor = green [# `* \' {: k/ t7 I$ P
set pcolor black
1 V$ ^) I* L9 P0 p set energy (energy + 10)7 V S6 a! x( f$ a
]2 T2 D/ j# T' B& u5 ?" r
ifelse show-energy?" r: D2 @8 ~" }
[ set label energy ]! t/ V9 w, M. e6 i. N
[ set label "" ]- C0 p& r4 l9 y* a0 J, q* ~
]
9 z: w6 C3 {1 k _* q" J) g8 Z" nend
6 \1 i$ f+ H* T/ j7 a! W2 [to reproduce
) |: z$ s' Z9 S, t4 C7 ` ask turtles [
7 H% c! R# i ~$ Z if energy > 50 [
7 _6 T' d0 ]1 W( y, _% ~% \' G2 q set energy energy - 50
1 I: p) `8 V% z0 Q( _6 s' k6 p hatch 1 [ set energy 50 ]
a- L2 ?- y: E) G( U ]
( f& }; W9 _% I8 i$ o& T ]# K9 ^, f, z2 o8 q
end
; U4 B z# \& Lto check-death
2 ~1 @8 S5 T: C/ t ask turtles [" S9 j) O) v( Y. ~1 ?' u: E
if energy <= 0 [ die ]& Q) v1 e9 v: t: Z2 a* \
]( d, p; v8 I4 B9 ]
end- Q& l. Q% I; `0 w
to regrow-grass
. L2 B/ c; R4 |% c% j ask patches [" X% [. t" h z0 F+ v( m
if random 100 < 3 [ set pcolor green ]4 E" V; g% i; g* K
]
' p/ f! A' z8 c6 tend
" j. Q8 \& v9 U+ E# j$ Vto do-plots8 s0 ^1 r' t$ X+ c! k1 o; w& u! g6 z
set-current-plot "Totals") l( _* _1 i* t
set-current-plot-pen "turtles"
0 {; m6 X1 \$ e: C6 _! I- l plot count turtles
& y: G7 Y; ~" Y8 i7 u set-current-plot-pen "grass"
; M2 h2 D5 f) \3 n7 |5 D |* s plot count patches with [pcolor = green]2 ~" }# }0 }1 s* j
end
; w; @* ?) Q# i7 L: [* `' ^6 E可是运行时提示no such plot: "Totals"8 |5 a/ `* w4 h( b1 K
error while observer running SET-CURRENT-PLOT
- t* Y/ U" `$ ^$ C8 M5 U a+ h called by procedure DO-PLOTS
* ]/ M" C2 z7 P) M" U2 u5 r called by procedure SETUP. ^0 v6 Y" {* t8 D: @. ^7 \
called by 按钮 'setup'
! t6 d* J: t3 p2 a/ Z求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
