我编的程序如下turtles-own [energy]
) g8 o- E8 Y+ K8 k: x S/ {0 _to setup
" S7 J5 u7 e1 H clear-all
1 E4 b& B; s2 B2 R; @" Y' W8 E setup-patches. H4 {, J v7 r% @: l
create-turtles 100
. |# }- _& \% ~ do-plots
5 |) D# M' G) w8 |+ i/ { ask turtles [ setxy random-xcor random-ycor ]
0 M9 Z T# X0 I# T) U. _7 C5 n1 g8 H8 zend
( F. H7 z( _1 p! l6 T: gto go v1 C" f' o8 x# d3 p
move-turtles
1 g `* N. c, C" X) W8 ? eat-grass
- K: a2 n" _- s1 x5 _. X reproduce4 | V8 p* c% j7 I
check-death
4 l4 k9 o& o1 }9 L4 h9 m3 D regrow-grass
9 k8 L& L" M5 l2 g& C, p do-plots
6 y. L6 Y1 z+ y3 A$ _- oend) z! G. ]0 I3 i
to move-turtles
4 ?' Y: R+ P3 v" |8 ?( B( d- E+ E& m ask turtles [. B$ P2 R* Z% l3 h
right random 360% n2 g( B6 ~: q1 b
forward 1
5 @9 \! H, m# \, a# p3 i( T% h9 S set energy energy - 1/ g9 i/ M* x) ~0 I( Z/ o
]
8 v- L0 f; H* s- M! F* B& Rend
, |0 f: W. \" ~0 Y Bto setup-patches0 \7 J; T) V. {! x% g% u
ask patches [ set pcolor green ]# a2 R8 r0 L, F1 J8 `5 S) x" j
end, H- w# _ O7 q" E4 b5 d
to setup-turtles
$ D- ?' {4 |3 d% Y) ?2 f" P- v create-turtles 100) Z: w; c; e+ C5 I
ask turtles [ setxy random-xcor random-ycor ]
) g8 x4 m L% r2 Qend
1 n$ d* a9 N4 _9 u5 X5 P. p; R8 Dto eat-grass' H; ~, n8 ^! E, K- r
ask turtles [
% T$ D8 U6 f- o+ Y0 \ if pcolor = green [
7 E5 A" S' c& N1 s+ e& o set pcolor black
+ P5 I r, Y: C+ p/ u$ O set energy (energy + 10)7 Z$ z% }% Z) G8 H, b- g
]% E6 }& s8 \8 m8 I: `$ x+ J2 S
ifelse show-energy?3 Y; V% r8 E- `: L4 U
[ set label energy ]( C" ~. Y& _& l+ Z1 O& r5 Q" c" e
[ set label "" ]
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end
. t c/ j7 w3 h' F. A/ Qto reproduce
8 U2 g1 c* f8 O* C1 y ask turtles [! R2 X. L' B% `" ^0 g
if energy > 50 [
/ ~2 J: d4 E# n% p, L0 i set energy energy - 50* h: ]4 h) {- {0 y$ K; [* c
hatch 1 [ set energy 50 ]
2 }4 m) p T2 X0 ~- K P ]/ E$ I. Y+ k7 i+ s
]
- j3 t" j7 n0 p6 m4 U# K. dend" z ]' y7 W1 f
to check-death) [! M1 W$ e# H" n; r/ x# @0 S
ask turtles [
3 }; r1 S% B& f: I. q7 @& g if energy <= 0 [ die ]& ?7 l" M& u5 }1 K' K# P
]3 s' t8 {. Y# K1 b
end
" M% l7 |4 x# Z+ d5 Rto regrow-grass( h. o& _0 l+ e O2 T% ]
ask patches [
' w+ ~/ U, H$ u& ]6 U if random 100 < 3 [ set pcolor green ]
9 L( C1 V8 ^, w6 I* ? ]7 b! R9 C$ w2 _; o8 b% T! z
end" N2 ~4 O1 R H- k R
to do-plots
2 p* h1 O- d# z set-current-plot "Totals"
) q- r( R9 h1 |0 B2 \ set-current-plot-pen "turtles"8 Z; V3 w, y' g1 N
plot count turtles3 o ]3 p7 h$ t
set-current-plot-pen "grass"
8 }" ~' s7 b' d7 K& @' n" W) } plot count patches with [pcolor = green]( x% v! O9 ?/ T; e* D
end
0 q2 z* f# u% U; a# Y6 G可是运行时提示no such plot: "Totals"$ q ]% _+ d* Q
error while observer running SET-CURRENT-PLOT
! [8 P; v s$ m5 Y2 j called by procedure DO-PLOTS8 T( N# \ ?4 ~; F' H& K+ S
called by procedure SETUP
8 m* M7 |; b1 I9 ^% D called by 按钮 'setup'
1 ]) ?7 r) F8 r1 ^, c求大神解答啊 |