我编的程序如下turtles-own [energy]+ @0 G" N6 ` W
to setup
7 j1 g+ D( u% d+ \ clear-all
" I% D6 p' i6 g6 k6 a setup-patches
. [2 _$ C; C. e& v. j create-turtles 1002 Y$ ^% t$ x0 ~. p# y
do-plots' r. k7 }, b4 s+ q
ask turtles [ setxy random-xcor random-ycor ]
# ~$ Q7 w9 E1 Vend
- j" n9 Z6 I* u, n8 t# Eto go
: N5 E3 Q$ D* ^8 @ move-turtles: g3 h. k9 x, S
eat-grass/ z: t: [) c) Z! X
reproduce
1 E) J0 M! T& b: Q i, B& q3 ~ check-death% f+ ~# |3 {! E
regrow-grass
9 N- ]% S: A5 j$ u0 G" U9 B) _; j do-plots
9 y# ]0 u; G+ q! oend) w9 s# w# z/ M
to move-turtles9 u6 ?) J7 V" m* `
ask turtles [) P$ \1 M* J8 R
right random 3609 X" i* T1 S7 c+ _$ I, y' M, ~
forward 1" v) N! y/ p+ o% k( f, T4 L
set energy energy - 1
% Q2 t& a6 ^+ o# N! c ], W/ T. F4 F' @; D- r& c) B
end0 l A) _/ y+ x" t$ Y
to setup-patches5 i' X0 P d5 q+ V% P5 B% V
ask patches [ set pcolor green ]2 x2 d J' R( b) j! P
end" ~- F' ]- k! H; f, _5 v
to setup-turtles A9 k! b$ Z8 u0 p: p: I
create-turtles 100. _* e+ p" K* z( P4 g
ask turtles [ setxy random-xcor random-ycor ]
: k8 w3 R9 l+ }! yend: T3 Z( U$ C! z7 b s8 s/ a1 w
to eat-grass
" \; X' s7 w/ b8 I" h2 T9 b ask turtles [$ P5 S- g# ~9 r. w: i: O, |+ r* v
if pcolor = green [
1 `$ ^/ m4 s! P* d5 o. E8 j# u1 [ set pcolor black
* o2 N7 @1 I+ {, B- H set energy (energy + 10)) t2 {5 e1 y' y: |$ ]0 ^
]
& ~4 j) y# i, U3 h+ P# G. \ ifelse show-energy?
, v8 }. G! }& U) d [ set label energy ]0 X! L* l9 r$ c' A; P
[ set label "" ]! a7 L' d, ` ]
] n& u7 J; f% t l* P- U
end
& l0 Y7 Y+ m, p/ d. Hto reproduce5 f3 l$ Q/ m1 M# h
ask turtles [/ `* M2 U, p3 z, P; T0 B3 w5 g
if energy > 50 [
* u: y' u$ N; C5 ]# W S# W) G set energy energy - 504 }2 ~$ W! c! O: w: @5 }& U
hatch 1 [ set energy 50 ]
' D6 E9 G4 D2 ]9 }4 t- g# K ]
2 r; j3 B0 u% [ ]
) D3 p7 E( o' U- W' p/ ]end: f" ?* L2 L# z4 v9 L7 N2 [
to check-death
2 X7 q- }. _+ E% Z! ^0 c" \6 K ask turtles [+ G/ `* T$ E, Q( L$ p. J' g$ f
if energy <= 0 [ die ]. |& ?3 S7 F* i2 F/ I
]
: w) g% P+ S9 z8 i9 aend9 H, _& P) X! h) `
to regrow-grass
4 s$ u4 V5 |2 z' G0 `4 y ask patches [
. Y! o) \' y- a0 c( t1 X% s if random 100 < 3 [ set pcolor green ]
) V1 u/ v$ D9 U% U4 j' ?8 l( w0 M- q ]
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to do-plots
$ z# C2 V4 s p. ?' W& Z9 e: l set-current-plot "Totals"# s H# P' |" e! z
set-current-plot-pen "turtles"
( n" m* ~3 K9 f/ K6 r7 ]( u plot count turtles
; A* l* \9 O% F$ |# I set-current-plot-pen "grass"
& X; N, ?4 Z$ H8 |* j2 T2 [+ [ plot count patches with [pcolor = green]& x( D0 A- j9 ]5 E/ \
end
4 q1 d, m4 H/ M) E可是运行时提示no such plot: "Totals"
& S; r2 Z. [2 V" ]. m ?error while observer running SET-CURRENT-PLOT
, _$ O- V, `. o; r* G' j0 D called by procedure DO-PLOTS a6 u' W+ Y3 n& A
called by procedure SETUP
7 v0 |0 N9 v( _' X. E# F called by 按钮 'setup'
, R9 U& p& O0 C0 h求大神解答啊 |