我编的程序如下turtles-own [energy]
, O+ |+ I! ]. c7 d. X) {to setup( q7 k) `0 g8 g/ s3 ~" I
clear-all
! B- k; W" g9 f6 a$ o$ v/ s setup-patches% n' P. R/ @/ d( B
create-turtles 1008 a- C8 _; r% s8 i/ I
do-plots
5 y; w+ b5 l# L; a& { ask turtles [ setxy random-xcor random-ycor ]
^, }2 I6 g3 d( oend% T- Z" Q1 q3 o( w: Y0 b
to go
) [) E* R3 w" y# m1 f move-turtles4 H1 N+ p& J; \5 `
eat-grass
6 D- e: C8 Q( `4 k+ m reproduce+ W+ Q5 m2 b' y& f
check-death
% ?9 b# Y4 r# |% } regrow-grass/ p+ Y8 B6 [) m5 h/ `
do-plots
, v0 q# \9 H$ P9 c- \end! E N" d% O5 N0 U. H: [
to move-turtles
# q0 z3 I/ a* a ask turtles [* x* h0 o( f& |: G
right random 360
; b& O+ \, r' ^/ v" D! v forward 1
5 x: Q9 _& p2 k( W9 O, j) d5 [& A set energy energy - 1
0 O6 q: [; r; y" `+ C* q& m ], I: p5 I+ v+ F" \9 P$ m
end
8 i0 y3 L4 X( W1 ^5 ]# oto setup-patches
& U, V9 W/ n, }0 l7 h5 B6 y ask patches [ set pcolor green ]0 E! w& o1 g! F; z9 t+ V8 N
end# O+ _- ]6 ?3 t* }0 E
to setup-turtles
. b0 R0 f" @/ Z" d) C create-turtles 1005 m5 b8 j2 A3 \' j
ask turtles [ setxy random-xcor random-ycor ]
( n6 F1 q% n7 F% y5 v7 Gend' U% x" u. _: ]6 R
to eat-grass. D& Z# t$ Z7 Y# g6 v
ask turtles [
+ p) x$ e+ h' s9 a$ y6 S* L' M- ? if pcolor = green [
3 \# {/ u6 q/ v" x, ^ set pcolor black; F/ `4 r1 W, {7 Y1 z
set energy (energy + 10)
+ R* I* f: Y+ l# |# N$ D9 T2 C ]
) @" W/ t! T" o# `* ^ ifelse show-energy?" P5 |5 @$ @; T* j( K3 R D
[ set label energy ]
1 J) K* u& U) M [ set label "" ]6 x: X3 `7 j- V$ Z2 S
]
% f4 h3 j R/ K/ kend
2 Y% w \0 k( D* N( t) u- Kto reproduce
: C+ w, g4 v0 h3 g* p ask turtles [
4 U, H. I% Q: J4 L" X. l if energy > 50 [# l3 X# E: W# f: h: u
set energy energy - 500 f$ s3 d- y7 C1 }0 N, `
hatch 1 [ set energy 50 ]0 {0 x ]2 A3 `" n) p- a2 K# B
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]
& O% f0 {$ X1 p( [4 aend
, u$ ?5 E. W& o9 wto check-death
7 i1 U7 F. f7 F I7 C) o5 k ask turtles [
; I! H) o' M8 R- G% s9 U if energy <= 0 [ die ]
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end$ [. O; l3 |- v0 `. J
to regrow-grass" W+ L3 E8 H8 W# G! e
ask patches [: S0 L+ R) n, Q% W) e
if random 100 < 3 [ set pcolor green ]
+ Y8 U; c4 e* ~2 x( }1 X ]. R* Q8 A- B) H) P9 }
end
4 E1 O- n) O4 L ~+ j" Q& pto do-plots7 M% y! Q2 S8 D7 y
set-current-plot "Totals"% j( q W4 c9 |
set-current-plot-pen "turtles"( G; z% d2 N" \& Y% @
plot count turtles' D& n( L P- e) ^ e p& C7 X! r
set-current-plot-pen "grass"
) I# r& h4 H" O# `+ f plot count patches with [pcolor = green]/ t% ^* n. Y. X. ^, @' k+ L
end' f2 Z) f6 N8 }$ O+ t2 n
可是运行时提示no such plot: "Totals"
+ ^% s# k- I- j) X# t1 W6 Cerror while observer running SET-CURRENT-PLOT
4 f# @' F# e2 b& S; m1 R called by procedure DO-PLOTS
( A$ Q3 c: x- C2 f) p: { called by procedure SETUP
& ~- a( r4 r' O; }- B( z8 c% V* f0 I" ~- } called by 按钮 'setup'7 j: s) L3 w+ B2 w
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
