我编的程序如下turtles-own [energy]
5 G4 V$ d( M& o1 e6 pto setup+ T' i- U; _4 N7 n5 n/ B3 i! a+ @( P
clear-all
0 r& S& p' F7 B% Y setup-patches
: v: d. N' E8 ^" E+ W- ^ create-turtles 100
: W/ b7 o* O+ o" s9 O: e; b5 ^4 S do-plots& F- J' z- k$ A) R' m5 b% |/ U
ask turtles [ setxy random-xcor random-ycor ]% k% r5 _+ L7 D
end; u" K( R( Y+ Y% Q
to go
+ U" \% R" P+ L9 I9 ~. ~! o+ ] move-turtles+ `8 ~6 W1 f. \
eat-grass. K( W: Q; w; ]1 ?+ u
reproduce! |, N5 X5 F" F
check-death3 H. S6 A2 @! j E; X
regrow-grass0 w+ |" X3 U' A7 X" M
do-plots% \6 ~+ i( E2 f( |8 l! [
end
8 M5 t5 ~% i: x1 c) k. Tto move-turtles! O0 D) _2 m) G$ V
ask turtles [3 Y1 h7 D. A* w4 V
right random 360
6 d) t; V1 Y4 r9 m9 B forward 1
1 s4 I4 P/ }7 }" d; a4 v set energy energy - 1
B' r0 }# C- R ]2 y# _. L4 d% j0 i
end* \; m4 s, |+ Q4 Q, z2 M
to setup-patches$ D+ }! z2 l1 D8 }
ask patches [ set pcolor green ]
$ m! z1 b; L: K: z: H5 \end, i6 A0 f, ~6 Q! |3 i
to setup-turtles
8 n( X$ h. C0 B4 ~1 T create-turtles 1000 P5 B: [+ y, D7 P0 c' d4 p& H9 Z
ask turtles [ setxy random-xcor random-ycor ]2 r- c; o! O: g+ ]8 n
end
& H, R( r$ s0 i7 J9 g) c l, Yto eat-grass
" p% W/ @2 q9 r0 n) {' Z& f ask turtles [& q/ |( ^6 j/ _! {' @7 x
if pcolor = green [; n' U, G% g( K
set pcolor black
; h0 V$ t1 [# H2 n- D8 ~7 [( V set energy (energy + 10)
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ifelse show-energy?
! U% `( d I0 ` [ set label energy ]
5 b$ B# l7 V$ J( t' B [ set label "" ]
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end
3 D9 K; f9 A2 g( C5 |( ?to reproduce
# M' ?- J9 P# @2 m$ f2 S. }- ?0 D$ j ask turtles [
" @6 s; j3 x i1 G# | G# L if energy > 50 [0 R7 q; v: [7 O6 X1 m
set energy energy - 500 l; d0 [# a6 Q
hatch 1 [ set energy 50 ]
% R7 g0 P# k9 ^3 G ]
! @( \! X7 l; c! l/ W ]3 c' }1 V# n' \6 _9 W% L) e
end) I" Y( H8 z2 i) O v t
to check-death
* E/ Z$ M {' _) n ask turtles [
T0 n( Y" d4 c, H1 j: t0 Y if energy <= 0 [ die ]2 i% s- @9 {7 E- d
]
. h" t7 X- n* Aend' X; n P, P$ O' h# S& H
to regrow-grass ^ a+ n4 U$ I* r! @% l1 ~
ask patches [! b" C7 b3 F$ f0 K/ i* [; K
if random 100 < 3 [ set pcolor green ]
* k$ D: {2 [) n8 [6 P7 W& t+ ` ]3 M) f& |7 Y9 w* m2 j
end
* g R# B2 k9 }- B5 ato do-plots
+ C/ J1 m4 ?/ C. B1 R) ]1 } set-current-plot "Totals"# {$ O) P" S3 E# @) a
set-current-plot-pen "turtles"! |7 m# X, V8 H- b# c& \! D
plot count turtles7 t9 a: ?* T: m+ N! v8 l$ }( D6 e
set-current-plot-pen "grass"9 n- ~3 o2 F) u# |
plot count patches with [pcolor = green]" ~8 D' z: S7 X* E7 g
end5 b! ]% \) A, j$ Z
可是运行时提示no such plot: "Totals"
9 z3 C" T; j+ `! j! Kerror while observer running SET-CURRENT-PLOT
# \' T; V0 h5 n9 x3 \ called by procedure DO-PLOTS! J& F0 V- Y z8 G
called by procedure SETUP0 W3 K: _8 x- j. m$ ]" [
called by 按钮 'setup'' A8 F# U8 l, N9 R$ B: q3 Y9 b
求大神解答啊 |