我编的程序如下turtles-own [energy]
* y5 {2 a& _( Bto setup
# y' q3 ? a9 N& ?: E* k- ^ clear-all+ O* L6 x1 f) C& r* T
setup-patches+ _! d3 U$ Q7 a$ {0 `( T; x
create-turtles 1006 G0 v0 |9 c3 n) g# F
do-plots( S5 x: j1 k4 W w% H# J
ask turtles [ setxy random-xcor random-ycor ]
7 f. t2 q. D5 oend
/ ^$ S$ s# _ f% w1 Eto go
! t j) P1 P" _( e& ` move-turtles/ I2 A8 Y( _# w# w! _4 g" a- ]
eat-grass" c% S& e( _7 O( x" w* o
reproduce- ~* V6 y. i7 N
check-death& r: r" W# a/ R8 U: r; l8 m
regrow-grass
( a7 @ e( }& J! e' l do-plots2 u" a$ k0 V) `8 T8 x; y
end
$ Q( A6 j) Q8 @8 J% O5 _to move-turtles
- M# V2 Y) z4 Y: y. S% L ask turtles [; @$ ?# \- r) \" s9 D* M% F
right random 3604 b$ O5 _ Y7 q5 x' M$ Z( }
forward 18 }1 \, S2 r) u: D( L: N. Y H4 t) G
set energy energy - 1" ]8 w( ?) e1 h) N/ r: A
]. U9 R7 D) Y! F R& a
end) n9 t) S( Q" N! J
to setup-patches5 G- q. ~& Z# L( a; L
ask patches [ set pcolor green ]* L0 S1 r# k2 L8 s6 S
end q) _2 ^2 x8 |' [& k* A
to setup-turtles" X8 [ q8 ^8 v/ B
create-turtles 1000 G9 R' p. H# X. V8 w( ]* o
ask turtles [ setxy random-xcor random-ycor ]! R: A D- n2 W4 o
end
& ?2 \+ |- r: rto eat-grass) c; @6 f! n; Q- Z! C5 V' g6 A7 Q
ask turtles [
% x& u3 j$ W% X `' X2 F if pcolor = green [
; T8 N% q; m) [3 y set pcolor black; c9 A1 X- f2 P6 \' s7 E
set energy (energy + 10)
G5 k* q& c! e- B' g7 D' d, B- k. L: Z ]) B* G- p1 ?, T4 j
ifelse show-energy?+ v& O) ~9 p% i" `: d: J/ }# _8 @
[ set label energy ]
) X j! I( m5 X# G0 F' S1 c [ set label "" ]
6 T8 R/ g$ S4 ^, T- Y ]2 x. [' F8 H0 r9 }3 j5 a, l
end2 D) O Q3 {( f8 L) \
to reproduce' ]$ d, z4 @. p5 {' ~% E
ask turtles [6 L t; l% ^0 d8 X
if energy > 50 [! Y5 p+ J- ~* { |
set energy energy - 50. e& `( [) K) u0 ~' k P
hatch 1 [ set energy 50 ]
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]. C! Z3 U5 s# y; A
end
6 \+ E( R! W0 O6 H! u z: D! Zto check-death( H) ? ^& Q1 m8 ]4 t
ask turtles [9 P$ h% G8 i0 Y) o; J$ W2 H
if energy <= 0 [ die ]+ S2 ~, v! O. \
]0 `! ]2 `5 b0 T6 u/ @7 ]* H" H
end
4 ~' F2 A8 P; h9 s' ~9 r8 h& bto regrow-grass
% S) z/ B1 I8 y' i; p ask patches [
' @ w. P8 L( T0 `6 U3 n if random 100 < 3 [ set pcolor green ]: o7 L1 L0 g5 w2 U8 L9 {
]: `) C, i% c4 v
end
% L( }8 ~3 R- l3 C; A- F4 Yto do-plots
" ?6 t) N7 c/ q set-current-plot "Totals"2 ^+ e* w: \6 o1 `& c `7 _
set-current-plot-pen "turtles"
) d4 s' B' O0 Z1 C( a0 B plot count turtles, W6 [" i& W5 _' r( m/ H8 c% v! s
set-current-plot-pen "grass"
% Q4 W) ~7 j D, a$ W- ? plot count patches with [pcolor = green]' n+ ^! f2 t$ ?3 m
end9 k# ^5 Q( I- F" g! S* ~: `' t- _
可是运行时提示no such plot: "Totals"0 P% n# v# @* i9 z* Q/ u$ }
error while observer running SET-CURRENT-PLOT
0 \# K$ S2 [' K9 P! v) h called by procedure DO-PLOTS# |7 |$ L, s0 L) j! u
called by procedure SETUP
1 Q$ g7 U+ E( C" V$ P | called by 按钮 'setup'
" R" e9 l* B ~0 }求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
