我编的程序如下turtles-own [energy]
0 A( @ X$ A* _+ m& ~2 Q# K9 k$ Eto setup
7 p. K, D. L0 A6 \ clear-all' z; }. b. h$ ?9 p
setup-patches
0 S2 S0 n+ f4 T: \ create-turtles 100$ o9 S- V5 w) V1 X, q$ L
do-plots- A- [, a! C- H. S2 f8 h9 W
ask turtles [ setxy random-xcor random-ycor ]1 ?) \: J, M; u, ?* b3 G9 q
end9 [& w, t8 Q* I* {; |' Q
to go
' F% X0 Q' `1 Z* e8 Z$ z2 K. \ move-turtles4 h1 K0 b2 B" m
eat-grass
/ v4 g! t' w2 w: q2 _ reproduce+ w* A/ }! E$ W! v$ A. r+ O0 _) Y
check-death" y! L6 d+ d$ {5 j4 }
regrow-grass6 _3 R9 ` }9 r& D
do-plots8 _/ N+ j- V u; c k( l
end) j- l/ L+ j& J
to move-turtles
% y! S" w4 `/ \ ask turtles [8 D# D: S( ]# f2 f& X; r
right random 360
( Z( u4 a c/ A- ? forward 1
b6 z& ^1 T/ E8 ] set energy energy - 1 Z4 _6 m9 D0 Q! ^2 h k: {
]
! i0 v* j9 k+ fend
6 H8 n8 E. N( S8 ?* dto setup-patches0 n# v( n+ {3 I9 r M( A8 Q% h
ask patches [ set pcolor green ]$ d: n* R/ I4 C/ F) Y: i4 ^6 w
end
* Q. ^3 q' y: j5 H0 E$ ^% G# @5 X8 L3 v6 Nto setup-turtles! _1 u( \6 ]- k% u& e% Q
create-turtles 100
# y- n; i# l0 f2 g# `) q4 X ask turtles [ setxy random-xcor random-ycor ]9 _( d; ]0 b7 ^) _& J+ p
end9 v/ `9 _3 {0 z* _, a
to eat-grass, j' G) u7 a) u
ask turtles [
! A1 i/ o" f& k3 l/ g if pcolor = green [1 f8 d' u* x1 X: J( S8 X" X
set pcolor black" S" C2 s# }5 p: s
set energy (energy + 10)
% m, B& p) c* v9 ~' U ]( k$ `) o( U& G5 B7 f. q
ifelse show-energy?
7 d9 F5 d6 `! d1 h% L [ set label energy ]
% D# s* F# r. L4 g& [) F2 z [ set label "" ]2 r% [3 q1 e$ R2 _
]+ n- k2 _: ?& f. b
end1 _2 T$ N* C2 ^; ^
to reproduce
, @) ]. p$ _+ a$ l2 o ask turtles [+ A* c& m3 V) H2 E
if energy > 50 [& b) j) B* J2 z
set energy energy - 50
" r7 `3 M1 A0 g) j( j9 }" o hatch 1 [ set energy 50 ]0 r& V* H5 }) v! @5 O
]
. F3 l$ Y2 Q# _- z' z d; L ]! ]* a: ]" @: r
end5 j- N; K' i. U' K/ m
to check-death
) Q1 P( i/ L6 F6 @ ask turtles [' I0 S+ ]6 _& f0 I" Z) n" b
if energy <= 0 [ die ]1 S) e( Q( f3 {8 ?
]
+ z# Z+ h2 _" s6 ]end
! Y/ P* s- w7 t, Y; T/ _4 Ito regrow-grass- W( y3 C" |9 {( [
ask patches [; w$ x: X* c6 }/ O) X! B
if random 100 < 3 [ set pcolor green ]
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end5 r+ [3 P: C# t/ ]) I
to do-plots8 J4 }, t( u+ w$ X' |8 K
set-current-plot "Totals"
, u$ u [ Z: m) v. Y" M3 O set-current-plot-pen "turtles"
/ t- B' w/ @! H | plot count turtles" V2 i) J$ U+ H& h V' T& i5 B0 R" R
set-current-plot-pen "grass"( Y! R# j) u+ a9 }
plot count patches with [pcolor = green]
9 O/ q, G# O$ q7 y* Wend. g9 a4 W6 A2 `2 e" ?2 X
可是运行时提示no such plot: "Totals"
1 D4 k% o' a5 D4 h2 \* r+ g: o% Herror while observer running SET-CURRENT-PLOT
1 E! d3 ?7 o% S+ C1 g1 t called by procedure DO-PLOTS1 d3 }7 }- ]0 m. V3 s, u+ Z% B L
called by procedure SETUP# `; ~- W( r0 `
called by 按钮 'setup'
3 M/ n, e% M4 h4 j求大神解答啊 |