我编的程序如下turtles-own [energy], v) a# V# v& ^3 O1 N$ y
to setup* g* [- i/ N+ r2 B, s( L1 I
clear-all0 F+ y9 d$ i a8 d, a: g- O( }0 q9 g
setup-patches$ o$ o |% }% {8 _/ Q0 G7 G2 Z
create-turtles 1005 H$ g8 T# |* N, c0 o
do-plots
1 O0 ?( s( D; B8 s ask turtles [ setxy random-xcor random-ycor ]
9 e3 k# n; {: c$ kend
& Z4 f% Z7 y: G" C8 O+ T h' cto go
) I4 e% B/ W6 E* z, _! x% Q9 _ move-turtles4 c6 m* j8 z9 z6 {1 \- F4 ]* E
eat-grass1 }) ]: n5 O: G7 A- E
reproduce
% t% f! k$ b u) M/ e2 k4 R check-death
+ J7 J+ J0 C9 \2 s" ] regrow-grass2 ~& R8 i2 |* _, q. c# Z
do-plots
/ V) p( H) u1 ~end
, T- g' b" B, @ [to move-turtles
: t) u8 H# @# M- H8 } ask turtles [
" e) c4 i4 L; d6 ^& I right random 360
1 D2 K' E, C2 j$ x n( e- ?" g forward 1
! G. f- f! n6 s$ l set energy energy - 1% K4 f& l' E2 [3 Q
]
& @4 P" X, j5 vend2 p8 \% X M& E9 f
to setup-patches3 P" L- P% m" I) P, o9 F
ask patches [ set pcolor green ]
% G3 v5 P6 b4 } X; g; \ H% v* Dend
" |2 p! x$ K) v4 A* R0 X' Qto setup-turtles
; a- z3 W& V' d8 H" Y create-turtles 100' R- w+ L. [6 d- r4 I) }; B7 y
ask turtles [ setxy random-xcor random-ycor ], S% G. D2 Z! }: d
end
8 Y7 |% H1 ~4 [' ? R8 t8 ~to eat-grass9 u9 r, i8 S# k
ask turtles [- B$ H* a% K+ }! \
if pcolor = green [
- E9 f6 Z+ K# f6 T set pcolor black
- t9 R: A9 w/ O' b# y set energy (energy + 10): d8 N) s7 r& F' d- @" W
]
6 e. y/ z/ m) |# W' @ ifelse show-energy?
/ `/ T9 l2 W x$ M- J [ set label energy ]$ v, S0 ?+ D, }5 c9 c
[ set label "" ]
0 Y4 u1 [5 W: P. @# F3 F" T+ D! J ]
" K# B2 d( t2 t; Y* d5 h/ h# @5 aend/ X. Q" R. ]' H# r$ a
to reproduce
: {; w% O( E: [2 i) ?3 x+ M ask turtles [
p" n2 W! U7 b0 N8 c! s; n2 e if energy > 50 [+ M B! x/ w+ g8 n
set energy energy - 50/ b E5 h0 E) z- O
hatch 1 [ set energy 50 ]4 ^/ q3 O% J7 O# l/ i8 p
]( f% D2 B) }* o; E" y7 s( x9 [% [. ?" d
]+ @7 A) X/ J" o9 A9 I
end0 ?6 [' |0 z+ b4 q8 Z) R
to check-death a. B. s; L& x. H& m: s
ask turtles [
h0 K) Y Q! u/ m6 k7 a if energy <= 0 [ die ]3 G W3 {# q) E, r+ o% z
]
( ? W X5 k3 @% gend* S5 d1 O9 R7 M u7 M* T
to regrow-grass4 i" s; K$ E3 B& r* v
ask patches [+ c' F, s4 E/ ` h0 Z# J" ~, X" w1 A
if random 100 < 3 [ set pcolor green ]: f; h! b9 z! x0 b X: u5 V3 U
]9 r$ \$ B/ `9 J, I" _# u6 L A
end
3 J% ? \' |3 v8 D' ^ |to do-plots& X# v, e8 S/ i3 W2 |( d+ P/ u
set-current-plot "Totals"
. O7 T& W( X* r; k% G5 U4 U5 y" _/ [ set-current-plot-pen "turtles"
1 [+ p& t0 t% Z) D. |7 ?+ b plot count turtles& I' Q) T- O5 o0 k( _) t% Z9 r
set-current-plot-pen "grass"
- D3 q7 b" l N& b: f9 E- Z plot count patches with [pcolor = green]
- j0 ~) C' @; m$ X# H. bend/ V0 v7 v5 y/ @5 Z9 T% S# `- ~
可是运行时提示no such plot: "Totals"
* x, M6 I E; L6 o; oerror while observer running SET-CURRENT-PLOT' M, j0 {. m3 I% E: {9 X/ H
called by procedure DO-PLOTS
1 G6 S% v7 }- K1 z4 }- r' e called by procedure SETUP
8 q8 Y) q" V& K5 ]7 j* J: @* n9 {0 \+ ^ called by 按钮 'setup'" h/ \+ ]- F" Y9 Y5 y0 p( O
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
