我编的程序如下turtles-own [energy]
1 I: k+ k, k* P v/ V4 Ito setup* S* H3 r/ _' ^9 i G
clear-all+ f: d6 Z6 c8 X; g
setup-patches# w+ l9 W* n% D' Q. I
create-turtles 1001 ] J4 F8 `6 a& F* N) I3 m- \
do-plots
p Q: U q* N( v7 T! T# x ask turtles [ setxy random-xcor random-ycor ]
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to go
0 D, I8 Y; E& X7 O9 E$ V0 P move-turtles
7 L0 P) A9 N+ w. t5 u% S eat-grass
# `1 Y P3 j M' A% l2 K) b7 n reproduce( n/ y3 q1 @1 w5 H+ g4 b
check-death: F/ D/ d3 d- [* E4 ^. }
regrow-grass
3 J, [* V3 ^6 d- ~+ V3 z$ r do-plots
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to move-turtles9 g: y: C# _+ q; q
ask turtles [
. \: ~* ~* x+ r right random 360
/ c6 S" {. C; [& D' j forward 18 q; n, ?/ @4 t/ y3 v
set energy energy - 1( A5 I! [/ P: }0 C2 c
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end; I0 J5 K$ J$ p0 ?3 F: M# |
to setup-patches
1 W# k: l0 X% S& O# C0 o1 B+ F ask patches [ set pcolor green ]
. L( i- r4 |3 D+ g5 C" `end
! f8 s) `' ]5 h+ k e4 w1 R6 b$ Lto setup-turtles( H2 M% g. v" N% u8 X
create-turtles 100- F. M7 R' {' e: Q1 H1 Y$ k0 u$ A6 d; @
ask turtles [ setxy random-xcor random-ycor ]
) X6 ~+ h$ q. b- h: Lend
1 V8 i* l) K' O8 mto eat-grass' H" b; Z8 X; |7 I0 G: Y6 k
ask turtles [; L, t3 |9 D6 w- q
if pcolor = green [9 Z' h/ ~5 L- t: d
set pcolor black- g6 O; A" E. B% ~& R! l
set energy (energy + 10)
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ifelse show-energy?0 s- r$ w$ Y# M: y5 \! U& C# l( o& s* A7 K
[ set label energy ]
. r0 ]2 d2 a% O! o% d [ set label "" ]
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+ M; ~' W2 b0 T. hend T; h3 {; a: @4 I
to reproduce8 A2 c6 F4 {' Y8 o
ask turtles [
6 E$ p0 g. Q2 U7 t, s% ? if energy > 50 [
3 G4 w4 t# f T set energy energy - 50 K. n% a$ a9 `% M( i: W7 i- j- s
hatch 1 [ set energy 50 ]
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6 ]5 r, m9 _& C2 H+ ?, x: t1 P6 Fto check-death3 ], w7 h p4 i& _& B
ask turtles [
8 E* y1 f5 S% j. Z" F G if energy <= 0 [ die ]
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end
/ W, { n; b0 V; G4 L. r+ } Y6 Qto regrow-grass" n6 n. C4 K4 `9 Q" w# C
ask patches [) f% j' _. R2 S* K2 u
if random 100 < 3 [ set pcolor green ]$ {2 \8 H) h' T6 b: ^! M7 g9 P. Q
]$ s8 u# G1 o% J# B# \5 E
end ~8 f; R+ Z/ H
to do-plots/ N, X8 ?# S- O
set-current-plot "Totals"
) N7 Z- e3 h; d+ Z' H* K set-current-plot-pen "turtles"
]+ S4 h, _) { f plot count turtles% l' N: }* }0 s |
set-current-plot-pen "grass"
f% |( v8 v* z% r# a3 B plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals". S- a: U! W m( ^7 w3 X, G
error while observer running SET-CURRENT-PLOT/ X& p2 r; X7 S( B
called by procedure DO-PLOTS
- y* M: m7 y, i called by procedure SETUP8 A& R+ e" k2 \* `& q* \0 @
called by 按钮 'setup') Q) q+ Y4 |/ q
求大神解答啊 |