我编的程序如下turtles-own [energy]
- S( P0 }; K; T) I* w- _to setup1 [' I% g; j4 a9 T/ O
clear-all$ q; s4 w% ?) a) ` j! U) _' X# I
setup-patches
- f. Q* B i& w6 ~7 z; N8 E( ` create-turtles 1008 g9 G% N& M- h5 f$ s
do-plots* G, |1 |; m0 ~% B% ^% Y3 g9 p
ask turtles [ setxy random-xcor random-ycor ]0 J. h% ^" f, V, Z/ v& c9 k* k
end9 Y9 `3 _) D) W" j9 \& [( S
to go9 n4 G9 }2 Z {" O, {( _
move-turtles, R1 k7 a4 C' \
eat-grass
8 l4 K, f Z# c reproduce* \# P' Q. z: S. X& p* k$ D
check-death
8 z4 {" b, ~, D; o9 r regrow-grass
) t: L& ^5 t* n4 f; |' g- e, B+ a do-plots6 v8 j% V( }! J: o0 S
end+ P3 Q; A" v" `- n0 n% a1 _
to move-turtles
9 v" U" h7 @# t( l f ask turtles [# ]: G7 u7 \7 s, r, I
right random 3604 K( j# Q r1 z0 R' B; R
forward 1
' u0 |9 x7 F9 @5 l% s- j set energy energy - 1) t, [/ y2 E0 P- k2 Y' ~8 X& M
]
0 _7 R% q' \) R* @2 yend
& S8 a5 i6 Y# m9 K' }. K" B) hto setup-patches
6 n4 V/ b. O( t" S [" r4 k9 x ask patches [ set pcolor green ]
: L, I c+ [; Jend
! N# J* Q: o8 n. B: ^) C w! Dto setup-turtles
8 K: Y! O5 m5 X4 a( r create-turtles 100& I; i- O! g4 q( T& U3 v3 u$ j
ask turtles [ setxy random-xcor random-ycor ]
% g7 G9 m5 m$ _ @) mend5 q3 \. P0 z5 I1 |
to eat-grass
6 g8 R; g3 L1 g! R3 W7 }: P ask turtles [" _6 m B5 U: D- Q# z7 o
if pcolor = green [- n( s4 K" N% x
set pcolor black# K* s9 M$ _/ m% d
set energy (energy + 10)& ^" o0 [1 Z6 @; _1 ]1 I5 P2 x
]+ h. S: g4 s v# a4 t2 `) x
ifelse show-energy?
2 L! {8 ?0 [: N1 {1 ^# U p; O [ set label energy ]' `1 |7 i: E& A3 V; k( l
[ set label "" ]
$ Z5 `; L9 w: `- ]! u; x5 f0 A2 N ]
1 q) l3 U- W1 p0 f3 C6 O1 pend% m! N( x6 B( m
to reproduce
# v9 l7 @+ _/ ?% y# d6 m ask turtles [
9 W R( c" w! I: k2 a2 w if energy > 50 [
7 I" p1 O: f$ c. W# t; E set energy energy - 50
/ X. D \3 j# C9 M# a hatch 1 [ set energy 50 ]* Z0 z% ~9 f$ T% G# C! p ?
]' x: b2 z3 C. |% t
]9 X$ g( i; U( }% ?! j7 e7 k L, x
end
6 B0 W U5 D) t1 |/ H! l, cto check-death0 H8 t' H4 V, U8 Y: c: a( v
ask turtles [: {$ e7 S \2 i& x5 @% s
if energy <= 0 [ die ]
9 z0 H" k- K" U2 L ]9 S- [( s* X: Z$ x
end0 l- T: M' D! H& p! j' ^8 M
to regrow-grass" u5 n; B4 X" D4 j5 f2 ^
ask patches [4 J8 a6 {% Q! D# ]8 k+ @3 t5 h6 u
if random 100 < 3 [ set pcolor green ]/ c/ M7 r+ z8 e
]. L$ [7 v# [( n6 c
end
8 V0 i9 S2 g0 w8 O4 a, N; Wto do-plots
, x& I; Y! \) ? g; K set-current-plot "Totals"+ S- H6 Y' z' l, D' I- y" p o" _
set-current-plot-pen "turtles"
! i X. B3 j0 q6 ]6 z5 }1 C1 p plot count turtles) j0 Q$ L3 t5 L; V- w' ?8 a; \
set-current-plot-pen "grass"
! c4 N; ]. L- y+ X9 ?' `) S plot count patches with [pcolor = green]8 }6 b: @/ d0 b% w# Z5 u; h
end/ X1 P2 q% s1 c5 b
可是运行时提示no such plot: "Totals"
& ^1 S1 N& h8 T) kerror while observer running SET-CURRENT-PLOT9 @; d: d. F5 o0 N9 { e6 }9 V x* k
called by procedure DO-PLOTS( {" Q8 W" Y. X0 d; Z" n
called by procedure SETUP2 Q' [, m1 s: ?$ d
called by 按钮 'setup'
0 |# O( x% c- g' Q2 g" x; |) D求大神解答啊 |