我编的程序如下turtles-own [energy]
8 E# {5 W* R0 w( S+ F( p% jto setup
H) b* A; B6 l+ Z9 X6 b clear-all, L! M: g9 D" Y( m* E% S* C, N
setup-patches
0 a* `& }/ }6 \4 O7 O& A create-turtles 100) {) M) t7 a( P7 k( J& j2 u: c
do-plots8 n1 v) l( q) E8 S/ `% A
ask turtles [ setxy random-xcor random-ycor ]
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to go
. ^& [* L A! `* T move-turtles# m" x7 E, h8 j0 b& [( q: x' ^9 v
eat-grass8 u9 g9 I& D+ P
reproduce
( N8 \; @4 x6 P2 |& ^$ ]/ L5 x9 X check-death2 ^7 ?7 i; n& ~1 ~# z3 W. m
regrow-grass0 T% G6 h% ^4 W2 v' a! N
do-plots
R; B8 {0 r" F: w$ M, Kend# Z) @% H0 h% y# K M+ u
to move-turtles
+ L$ v" g' v4 E7 V; Q' P0 O3 J ask turtles [" M i* T2 g6 B6 P! z. p
right random 3608 S4 [/ q0 R9 i! n
forward 1
! e7 _" V9 c/ C& e0 v$ h set energy energy - 1
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end+ x7 T5 I" y$ b
to setup-patches& D6 T% [/ Z# `' }+ O
ask patches [ set pcolor green ]
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to setup-turtles
3 `* D. d$ N+ F% o create-turtles 100
, L/ N2 j( \. Y) \! _. @ ask turtles [ setxy random-xcor random-ycor ]) F" k, H( Q3 K6 f1 ^
end5 u% y; }8 s; u8 u( G9 ~ t
to eat-grass# o* J- Z/ S! O2 I7 m, @
ask turtles [$ q4 j- W- s8 I& ]4 ?& q1 f# C
if pcolor = green [; @ ?+ h& {# D$ x, u
set pcolor black9 e' f. o0 i1 U
set energy (energy + 10)
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- L9 Z6 Y; i1 d2 P+ |; g ifelse show-energy?
, W3 b9 a0 w, `( d! Q+ ^1 S' c4 c [ set label energy ]0 s' B' o- f2 f) u9 z) |
[ set label "" ]% u/ y+ x( s- L1 @% K" W
]
, Q F* Q( Y$ aend
& @/ z. f1 g: N! Fto reproduce: X: E# f, x: r2 v9 r3 E7 J, K6 {
ask turtles [
! a0 J9 O) x) h) F" |. R3 u if energy > 50 [
/ N6 R& k8 N4 k J) O set energy energy - 50! Q, N9 b* K# ]+ D3 R' @1 i
hatch 1 [ set energy 50 ]( ?( d3 |- L$ D J6 T2 p6 L
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end
+ S/ s |- K* C% cto check-death
8 i/ L; L; J e; i1 }) i ask turtles [4 ]2 ]6 ?, T3 Q) t
if energy <= 0 [ die ], b# R; P/ e+ u/ o' l
]
# \7 K2 u2 c1 |end+ e9 ?4 F4 ~( ] e
to regrow-grass, v# G, {. J9 ~
ask patches [
' \! V2 ?, U( S; ]# t4 p5 S* g if random 100 < 3 [ set pcolor green ]
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end
/ |2 ~$ K4 R9 E$ Bto do-plots
$ Z- V. {7 n- i* S$ X set-current-plot "Totals" L% I8 @6 N. E0 o# u" u
set-current-plot-pen "turtles"& i' S9 k' \/ K. d
plot count turtles
, I+ d1 {$ |! a7 u! o8 w set-current-plot-pen "grass"9 C. H* a9 d& q8 S8 [; _
plot count patches with [pcolor = green]+ ~4 V& V" o C, _
end
' \0 n) ?5 n6 [可是运行时提示no such plot: "Totals"& p' _: X" }( G/ c) F$ s
error while observer running SET-CURRENT-PLOT
# w3 @, o l8 A# m called by procedure DO-PLOTS
$ E @2 p5 a8 k! q2 ` called by procedure SETUP
6 Z, K" s! C7 L( _; F2 l% z called by 按钮 'setup'! n |6 a) @5 \7 R7 B
求大神解答啊 |