我编的程序如下turtles-own [energy]5 j1 z5 q+ P+ N. q3 m8 r" r: d
to setup0 F" I* k1 t* |4 G/ ?
clear-all" v7 K3 Q; t" |
setup-patches
8 j7 v5 e" a% N) |& I create-turtles 1004 p( @0 S" [0 ~# H) r
do-plots6 W p2 E4 P# a5 _- \) J# R6 @. i
ask turtles [ setxy random-xcor random-ycor ]! L7 m; }& H/ H4 |" V6 C
end
( a* m% n3 b* T. ~, {to go
# f# {$ c! A& F- @$ d move-turtles
% z$ o5 s2 x. E3 l9 {( T* v$ B% V eat-grass1 E1 e" w, _. x% X9 q
reproduce- e1 U' i/ _& W6 e! _
check-death+ J5 B( m# Y/ D1 w
regrow-grass
" `9 C# w5 k f$ N2 N do-plots% [4 j; n" U& e& \) {6 v1 a+ J: Z/ o- z
end
6 `- p0 T2 u% H$ |* Y: Nto move-turtles
* Z8 G `2 d& @) t( r ask turtles [7 ~: K2 J" Z" J* n; e: F
right random 360- T- A( i2 Y' ~/ ?! P5 c. q k
forward 16 H' ~ L; q: F& q( X6 D( F- c
set energy energy - 11 Y7 L- ]0 k, P
]0 u3 I& z# O% M: S
end6 t6 k9 D9 [) k3 d8 u
to setup-patches* s9 { j' i5 _, d5 G# u7 E
ask patches [ set pcolor green ]5 Y0 Q5 K: E# e! w
end- \2 s* }% k2 S7 _4 R6 y6 V7 j. r
to setup-turtles
0 A. y& @5 i( a g create-turtles 100
1 N" m/ B9 \' C4 ?3 F- I, @) h0 P- o ask turtles [ setxy random-xcor random-ycor ]
6 k5 r/ g; V/ Aend* m. f9 T* b2 }
to eat-grass
* h' f7 M' [+ Z$ y ask turtles [$ N/ C+ P* g+ J: d% x0 C
if pcolor = green [ p1 B8 Z) [( c A2 V
set pcolor black
) K, p% M2 h2 n set energy (energy + 10)1 x- U1 _4 m' }$ Z
]
0 s2 p' m' C- _: m1 A% `2 |: k ifelse show-energy? `5 F& F% F1 y" t9 i5 \
[ set label energy ]
S+ n4 t! s2 ^' b$ j/ H [ set label "" ]- O0 I% @6 q+ b0 z
]9 p$ Y1 X; n- v1 g# p! b$ x& a
end
/ f6 e' a5 |! lto reproduce- j+ F# ~, k3 i U
ask turtles [" }# _4 e5 Z! f6 k( q1 O
if energy > 50 [$ S# U5 s/ x0 F. ?' ~
set energy energy - 50
! `3 B9 [. o6 k8 @7 j hatch 1 [ set energy 50 ]
& `$ }" M9 ]! N, S ]# F- V q; v4 M, Z9 x+ A |" ?
]1 u" i' K/ U; R9 n
end
3 w. D* A$ V( S+ mto check-death
- _2 r6 b6 [5 V8 x' `. W ask turtles [% A1 Y% M0 m* r/ t$ N& y
if energy <= 0 [ die ]. }2 S5 t- v; ~
]
a) e6 C5 R L! b8 z2 e) f2 [2 {- d6 Zend
) K# i! ]% u& V/ X' sto regrow-grass) J* T$ C" n) l) Z% e
ask patches [
+ U. k; X* [8 X+ `* D/ \5 j4 W if random 100 < 3 [ set pcolor green ]
% H. y: P4 u' J6 g ]$ G3 ?% R6 C$ k, W3 V4 N K `
end- Y! ` @* p6 b$ y
to do-plots
* E v7 W6 n/ f4 r" \7 W* I6 e& l, { set-current-plot "Totals"
6 R# m- c" |2 R set-current-plot-pen "turtles"9 y& e2 @) z- A) l- h# ^5 J& L+ ~
plot count turtles3 i. ?7 _8 {. X- i' d7 i
set-current-plot-pen "grass": c! `0 j! p* r4 ]/ p7 i
plot count patches with [pcolor = green]
0 W1 c5 Z) u2 E( K, L# f, |end
' r7 u+ L# ~! l" R- N4 S6 s) H可是运行时提示no such plot: "Totals"
8 Q' }2 m" U& @+ ferror while observer running SET-CURRENT-PLOT
: l3 q8 G# C: r5 k; C$ A) Z4 D* }" G called by procedure DO-PLOTS; o% g% w8 ^/ @. S) B, P3 V$ I6 a
called by procedure SETUP
7 J$ l! p* o$ V% o called by 按钮 'setup'$ Q$ P5 K0 g) L8 A
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
