我编的程序如下turtles-own [energy]0 J3 t) e& ~0 Q& S( H
to setup1 J! H1 U9 ^3 w
clear-all4 ]4 |- B( ]. l t" _
setup-patches
8 A6 W" Z& J6 K- j create-turtles 100
% a8 U" q. e7 j3 S# s/ N) E3 p, p do-plots
, y- l; d$ ]" `! ^ ask turtles [ setxy random-xcor random-ycor ]5 ?' x% o6 w* ^8 h4 H' N
end
0 \) a: z+ T+ _ L* E% qto go/ Z0 u/ r# s5 Z
move-turtles
& |, ~, f, b0 P( Z( d1 r/ O eat-grass
! H5 I1 B* a, \ reproduce$ T$ h3 F( \! t& L
check-death h1 L2 Y+ g9 }8 E% B+ F
regrow-grass
4 I7 C2 N% e/ f& H. i/ W do-plots" T5 N; K( E; c& V3 h1 U0 V# Z
end* N! L' @% F& r, ~9 O
to move-turtles2 u" a; D) o9 x# G5 ~% r
ask turtles [
% m. z4 F9 `0 A2 L5 o2 O$ h right random 360
/ H) h% R1 L a Z4 F1 U5 ]1 m3 y forward 1" ]2 i# T9 G- c4 r, B
set energy energy - 1; q& J. h. Q: v i# Q0 e
]
1 p; T w2 {7 k/ \& bend" Y. T1 l" v3 G# `$ U
to setup-patches
2 u9 J5 G, j5 M# D+ a ask patches [ set pcolor green ]
4 z+ l$ Y `8 A0 D* b4 tend
" B! S4 G' ?) I3 l3 Dto setup-turtles
3 Z+ D, H" ^/ W r create-turtles 100
2 ~4 X6 _7 W/ s" r2 f* w {0 N4 M ask turtles [ setxy random-xcor random-ycor ]
6 e6 x5 v4 v& k, U. Y, Kend6 N3 e* c& S' R1 n
to eat-grass
+ v- [& j- X2 O8 h" e ask turtles [! a$ I- J% { N% ~0 F8 [
if pcolor = green [. A1 r6 d- d- T) \
set pcolor black( E; e5 W; n5 D: E3 x6 h+ a: b: t
set energy (energy + 10)! f+ \1 \1 i; U
]
: C/ [5 |0 o* u- O* ]$ D9 ^ ifelse show-energy?
0 q1 x) r! `7 D' m& V& m' e [ set label energy ]4 A9 L* `; v" p6 K3 P4 H6 f3 M
[ set label "" ]
$ x$ G1 R( U0 b# b* s8 r ]& y3 s7 R, _1 f
end3 Z4 b; z2 i$ A- i4 s' C
to reproduce
8 N2 x( r6 M/ C3 [0 |/ E3 S1 ?, } ask turtles [
- g: L& L2 f; L1 ^0 h" T/ E if energy > 50 [; m, m) V/ D F$ _0 l. m
set energy energy - 50
' ?. |) v6 e, Q hatch 1 [ set energy 50 ]
/ t* V8 r U% [2 ?! P ]
$ l- {, ^3 i) E. X6 G ]
* m$ P9 C" j6 @" R$ {$ Aend4 k) g% N3 i% x4 A
to check-death
5 F0 q$ V4 m' p4 R/ j ask turtles [' ?! c6 }5 ~) D
if energy <= 0 [ die ]
0 a; }9 x3 S) ]* [ ]
2 k9 n! a0 W4 ^/ u% Vend1 d& z6 ?- d4 Z% \( x. M
to regrow-grass+ T+ L( L% J' Z- J7 e$ J
ask patches [
: p) s. N3 O9 x; J, c if random 100 < 3 [ set pcolor green ]$ Y. U$ v' C5 S1 x
]
' \1 n: B8 N: Eend
, E) T- L/ q3 [2 m \3 s( wto do-plots0 ], l9 C! Z! s8 z0 ~5 ]
set-current-plot "Totals"3 l6 H$ k- H! f% U0 ?# }1 @, w3 v
set-current-plot-pen "turtles"/ \1 R- `) c; |
plot count turtles9 Q1 [3 w% ~5 c8 s) B$ K& a+ N4 b
set-current-plot-pen "grass"5 Y# l4 Q4 d7 [; N
plot count patches with [pcolor = green]6 j3 D, x2 Y( I
end
" v$ B8 e+ G+ U+ E9 K可是运行时提示no such plot: "Totals"
; w; H [) t* L! `error while observer running SET-CURRENT-PLOT
8 u% d, s- \+ l2 Z) ] called by procedure DO-PLOTS0 j: a6 Q# K* Y9 W, t7 d. e# v# N0 I
called by procedure SETUP% `6 V5 \# d9 l7 `; Z7 y' l- `
called by 按钮 'setup'- \ ^. c1 e& L3 [! m* @( i
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
