我编的程序如下turtles-own [energy]/ P" X0 a, e; e; V
to setup/ X" T# z- j0 F
clear-all( {' R$ h: y- t" s: s
setup-patches, X' L8 E5 }# W# K* ~- L
create-turtles 100
# G; ?5 ^" N/ i x' u" y9 K' h' _ do-plots8 q6 d: s2 P1 |" y# Z
ask turtles [ setxy random-xcor random-ycor ]
8 O- g! C; H( K4 v5 T. eend
8 J3 _$ A J2 xto go" N% Z, e2 x$ z0 x3 x
move-turtles" x ?( K, O: |; a) R
eat-grass
1 ~% a8 L1 z* Z( V$ h, |) `; P( \+ e reproduce
* L- \* c- P0 y5 y& c; r3 o check-death6 a: Y. g( T: ]) `6 u# L
regrow-grass7 ]( ?% b h! b, c# ^' u1 i) t
do-plots+ h2 G* }" e2 D: u9 i7 A8 _
end
0 s1 ]8 m/ `) ]to move-turtles+ y5 n2 c8 n7 W$ R2 X/ m
ask turtles [
! W* [' h% X* v/ d+ l1 N% K* h right random 3607 e- g- y$ j1 f7 M- g1 X. M
forward 1! Q( B8 n, N, }! c% S) ^
set energy energy - 1
" N B' ]+ X$ ?$ ` ]% f! C& o1 X, g' Y& _
end
! h7 l9 t# G7 e$ W" @$ R, i8 oto setup-patches
: J/ w, _" v& I3 }8 n; B6 i ask patches [ set pcolor green ]8 k, Y7 G7 s# p1 M; U% H2 o
end
2 b7 e/ {8 M6 z( M, Ato setup-turtles& a8 @- Q0 H# [: F' J
create-turtles 1008 v2 ]: U$ E" m3 m0 c5 v; e8 Q
ask turtles [ setxy random-xcor random-ycor ]
3 l0 F! m$ ~9 p, p* ], {end
) M4 P# Y& m8 w$ d/ H' p$ m& nto eat-grass; `" B4 o( M# F" }' ~3 B
ask turtles [9 e+ c; G& o8 C0 R
if pcolor = green [
" ?; @4 d9 O1 P# M8 X0 U2 o set pcolor black
; t3 g$ x8 Z! y# T* s- B set energy (energy + 10)( \+ Z4 L- g" z O8 @4 o" ]
]
y+ W$ [$ j% O* R- |5 ~8 I ifelse show-energy?
6 h6 }& j: M+ G1 P& F [ set label energy ]
7 y- [1 M3 {2 ^& X [ set label "" ]7 Y" R! F2 u, c; [+ ?
]' D* I& m) [1 L' _# ?
end
6 y% Z) B9 Z+ P7 Yto reproduce
3 D$ m" J# @* d2 `: C) { ask turtles [) M* e ~) ?: G, F5 E0 L
if energy > 50 [
2 t! T# y0 g+ C set energy energy - 50) M. O/ }: K2 G6 n& N
hatch 1 [ set energy 50 ]$ a$ e, Y8 D. p$ [5 y
]( l9 ?$ X' R* Y* C/ O. M, p% G: E
]3 F4 R( n8 X: }, |
end
/ c3 O% F, q$ z/ Q! j; t+ dto check-death3 o2 x/ I3 W4 v/ n1 c) T$ O1 i
ask turtles [: M9 F8 h: {7 z
if energy <= 0 [ die ]
9 z- [* T- I7 m- h$ w, _ _ ]
& P& R0 B& w. f, _; zend# t* O. R: ^/ f# h) |2 p% q
to regrow-grass% ~* A1 r# v* k o6 F2 W+ }% c
ask patches [
% |! L- O: x, _: r if random 100 < 3 [ set pcolor green ]% H9 p$ @! K# p' Q: S$ N4 N
]/ v, [1 Z0 j% q1 B6 B" {# a
end
. _# {8 c- T& a( ato do-plots
" ^# U3 M' t9 ]4 D$ A( q set-current-plot "Totals") ^& S5 g; e' {
set-current-plot-pen "turtles"
8 I% Y3 i0 p: t9 j plot count turtles; B* b t4 R" k$ H) ?2 c
set-current-plot-pen "grass"
8 m3 ~+ U3 R- x* T' q% D plot count patches with [pcolor = green]! Y) M" r! c8 B- m
end. N1 Y: ^% R5 M- V8 d
可是运行时提示no such plot: "Totals"
8 W% j m" Q3 Y6 u+ Jerror while observer running SET-CURRENT-PLOT
$ P! Z: G3 f R5 D: V* P$ B8 s3 n called by procedure DO-PLOTS
# F* C* B9 z" B7 G4 [ called by procedure SETUP
8 v2 q8 a/ {/ b6 I8 y3 k) ^) g called by 按钮 'setup'. z/ @# B4 b% l; g* k- g
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
