我编的程序如下turtles-own [energy]/ Q3 N" @9 b0 l7 K) I: A5 B
to setup% {& W2 p9 Z' u0 h# p, A9 @4 H
clear-all
0 P* V! U& e4 i. L& Z5 E2 F3 G setup-patches0 u2 A( Y5 R" U' x* s& m' c
create-turtles 100
0 J% y% b! [4 t4 F do-plots
! i2 X" D8 D- a+ F! y% k Z ask turtles [ setxy random-xcor random-ycor ]+ o* ~' Q% i6 y4 C% h3 t
end+ Y7 B! Y4 m/ d: _" g6 n
to go, C$ P [! o% ?
move-turtles" e* @$ H; o7 ?2 q" S7 h3 K3 {1 y
eat-grass
w! X( c0 ~9 \3 r/ M reproduce
# w# Z; a* I; w, J5 k$ Y- P7 `8 b' X/ ` check-death! L6 x0 N( I2 z4 L# C$ b* R! _ x6 ~
regrow-grass$ b/ T& t! x( O, _: I7 H
do-plots) P0 S1 |9 P" {. t! Z0 U2 F$ {
end& ^) Q1 [" F' A* h* a A, U; }& v
to move-turtles* T( ^' k/ T. \+ T1 x6 ]
ask turtles [
& Y; K( M) m9 t; e% k right random 360
& ?' ]# w, i9 _8 f* s- g forward 1
) ?0 @' M" j9 \ set energy energy - 14 \5 W/ B! |( p9 G% [6 `
]& n" t$ ~- i2 u \% e6 L
end+ l% R/ d ~7 w# V
to setup-patches
9 n" Y* S, b. Y5 |+ \* a1 ?, z) z6 i ask patches [ set pcolor green ]2 F2 j" ?/ I( z' y1 |
end
; P/ R7 f5 e' l* ito setup-turtles1 F4 ^- l y1 s- D) t% E- ?1 _7 H. Z
create-turtles 100
( M+ [5 k T/ E7 | ask turtles [ setxy random-xcor random-ycor ]! r; O2 N- X3 U2 h2 ^: _" E6 b
end2 L* h& Z- ^+ Q" m# R' u+ c4 X+ R" O5 [- e, r
to eat-grass
% K. {7 q2 d2 w0 N& l( l* p ask turtles [
# z. B) m% U9 h1 _ if pcolor = green [3 E1 O- e( q% O: }+ c
set pcolor black" Z% q: G- ?, ?! V3 ~- h
set energy (energy + 10)
% w- t" p3 y+ S. B2 _ ]
" ~; ?9 a& C: l, t+ h ifelse show-energy?) w% H) n K5 w/ i
[ set label energy ]6 J; [7 r. O% i
[ set label "" ] z; p- ^- I* p3 r
]
) b& L4 o$ Z0 ]/ vend
$ S+ |. \3 s' y; L7 \/ Hto reproduce
; e: j E9 U- ^( F; w9 }6 }6 K ask turtles [" z. b3 |% l, c, P! w4 a
if energy > 50 [
4 X8 ]' D5 M5 f/ @0 W4 j set energy energy - 50+ `, p3 ~+ m! `
hatch 1 [ set energy 50 ]5 V0 ^6 D. i9 @! Q& x0 G7 y
]
k# E. Y) h; j* \) Q2 X5 i ]: {4 l# w! j+ @& W1 f( w, _, H
end& A" q4 l6 \, s+ _4 E
to check-death
' F, U" J$ r, m" c ask turtles [
2 H9 o& P( m- b8 v- X+ b if energy <= 0 [ die ]+ D! W8 T& V1 l/ }" g2 O
]1 p0 R. Q% C# i; e% W
end
( h! T; I6 ^( |+ V8 x2 G! ito regrow-grass
' V: l9 S: y* a8 u& g ask patches [) ?) y! L% e R7 o+ }; ?
if random 100 < 3 [ set pcolor green ]
/ I1 B1 u$ q/ y# j. p8 X# i" a ]
% A. o$ K2 M4 _7 Dend
" K) A- a6 l& h/ F, N7 f. Z$ s" d5 nto do-plots
2 b* s# z0 C r4 v# \: M- R1 ?0 x* X+ g set-current-plot "Totals"4 Y& t) t* ~) k7 i" X' D6 v1 S
set-current-plot-pen "turtles"
7 H: Y; s- n. X3 N plot count turtles4 [2 d( o% P, K
set-current-plot-pen "grass"/ Y% B6 i6 I+ |8 |. ?* N( c2 I9 |
plot count patches with [pcolor = green]
9 |- M6 ]& t: X7 Z2 J2 [* tend( y' q: d5 x& R
可是运行时提示no such plot: "Totals". G% l, u8 E" f0 J0 s. ~/ D
error while observer running SET-CURRENT-PLOT
" V" o7 h" j8 Y( w called by procedure DO-PLOTS
4 y# b: d7 c$ M9 f1 ] called by procedure SETUP
' p+ @ c7 Y2 f, H# q# o5 E4 D9 l called by 按钮 'setup'- U O1 T5 p k, o
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
