我编的程序如下turtles-own [energy]: e1 C" k m: t: _/ H) D
to setup3 h, _2 }: d$ e' i# U, b4 N
clear-all
! x' `4 {7 s: {: `4 P: _/ W6 n) x setup-patches% V3 ]' X/ F/ Q9 t5 o
create-turtles 100
# L# `+ u# _- o$ Z/ ^ do-plots
( F/ T/ X" }! g7 ?6 g; y ask turtles [ setxy random-xcor random-ycor ]
0 H" S+ }! v3 t; x& R! Q( C3 l4 b$ g/ yend
7 {, c4 ~8 U( }to go# q. }$ v" c* f" x) w" X. u) W
move-turtles% m1 J% l: n( C( v3 F& E; e
eat-grass9 X3 @ X) a$ Y3 M
reproduce
( d) p& S1 i9 h7 y9 j check-death9 w1 g0 r3 P8 ~4 v5 \6 _
regrow-grass) j% U. G3 Y" ~8 d8 T
do-plots
& U% |3 D/ [7 v/ s+ cend
7 v6 `1 Z7 h0 ~+ V/ G6 U" ^$ Xto move-turtles
$ u Z0 l) W: w) \7 j2 C! i ask turtles [( a# x( C2 G+ W: E1 p3 i
right random 360
: ?" v6 h7 O9 p, y& b, e; Q forward 13 s* d" A) W+ i! T( ?) H
set energy energy - 15 R1 O' \# Y. X- x. z
]
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to setup-patches
- L) R z4 p8 U ask patches [ set pcolor green ]8 l, `5 q6 r H- Z+ p0 j3 x
end
0 D) K& {- Y* V" H! J% H0 L7 Dto setup-turtles
" r& Q% v% W; E8 G# j; { create-turtles 100
; z# F4 r' E H, l3 x& X; p: z ask turtles [ setxy random-xcor random-ycor ]! c7 W- F" ^: p. \( y# K! ^- X0 r, n
end, S, ]" \' g; r: [
to eat-grass, H( w" N* F. m
ask turtles [/ y! v }% |, k( Y$ O) f
if pcolor = green [
/ S6 t" @5 g7 q! c set pcolor black
2 ]8 u! x- k7 d4 ?( E set energy (energy + 10)
. u2 `5 h+ g6 @1 \ k$ } ]
4 }1 S8 W/ s8 }; k/ z0 C# j7 \7 O ifelse show-energy?
6 O4 F* M q, F, U [ set label energy ]
, O2 |$ Y2 l: i6 ? [ set label "" ]
8 Y, i/ {2 } r$ `5 T ]0 W, B$ {8 x# L, ~9 T- E
end" d% a6 J! m- C0 A4 m+ m7 [7 e
to reproduce
+ h" B: [* r J5 f& \0 V" ~. L ask turtles [
# N/ e% z" A0 v a- I: i: | if energy > 50 [
Y2 _2 e7 y1 s. H9 d9 n set energy energy - 50
8 p% R. V# I5 i! A J: s8 F hatch 1 [ set energy 50 ]
" v, j# y9 z& q9 m7 q. i) ~ M! r ]' p8 L# d0 k; n4 c
]8 X( H( j3 S0 k
end* I& P5 A" [ k8 n3 q$ e
to check-death
a( z( I, e) @6 |* u! T r ask turtles [
! _; _6 Y* A/ m if energy <= 0 [ die ]8 p3 r: E; W4 P! c7 q
]4 ]# U" W+ Q1 x% H
end
! B: X; n$ S( z9 C1 S9 zto regrow-grass2 ~, d. R" r8 f: V! l
ask patches [/ @ h' l5 P' @
if random 100 < 3 [ set pcolor green ]2 g4 V6 c& J. F+ R0 }- o( o
]- |7 w! O5 ]% C9 X3 P+ z% D Q
end
9 j$ u8 @$ V2 L3 P8 F/ Oto do-plots7 Z( C! s; t$ N- z- l- a
set-current-plot "Totals"5 H- a% o9 O: N+ w/ G, j
set-current-plot-pen "turtles"0 E2 j; t; I/ K6 I( F0 g
plot count turtles+ }5 n; s: D; ~6 b$ o# l$ _
set-current-plot-pen "grass"2 b, h* W; V: \. O. j
plot count patches with [pcolor = green]
# |' x4 k- y+ M$ Qend: {& g2 C& h* L1 c( x3 N9 Z
可是运行时提示no such plot: "Totals"
! C$ G5 j) d0 ?! n$ i3 Werror while observer running SET-CURRENT-PLOT1 l+ h8 v$ l$ \& O
called by procedure DO-PLOTS
1 v" u; g3 N. R [' U5 S: U* X2 f: @& r called by procedure SETUP
, A1 q4 g2 \& A! H, x% c called by 按钮 'setup'
' N* M1 ^7 T* Y- N7 b* `7 Z/ J0 W求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
