我编的程序如下turtles-own [energy]7 k6 J8 N. b* i/ M' |
to setup
2 e& i$ p3 }/ }8 C, m; [ clear-all
; m4 W4 Q2 ?9 z1 |/ } e1 E setup-patches
% H U6 u$ W, \ create-turtles 100
! F0 C+ i: o, n1 l/ h- }6 S2 i do-plots
7 w1 |( c& [6 z0 c' k0 q& y: W8 Y ask turtles [ setxy random-xcor random-ycor ]
8 f+ \# a( Q3 U3 l8 |8 ^- h0 [end
5 ?+ g( ^# f5 w6 }4 K9 mto go
# ~8 x: p6 D6 R! a move-turtles
6 M! p, r/ S$ v eat-grass
% ^& @+ F1 E: ?, _ reproduce+ V) k: w" R/ g; s# K, x$ ^
check-death; }8 w: u5 U7 F/ L, Z n
regrow-grass4 Q0 A' ^1 X, f; b5 E
do-plots
7 f! {4 N: J; \8 ~: gend
: U$ |9 x1 w' t3 A+ D/ k* v4 Ato move-turtles9 T5 `/ d& V3 o5 |/ p }
ask turtles [
& C5 `: [ _5 j1 D+ z1 ]2 X8 d5 [ right random 360
' m1 R/ E6 K9 e3 }9 Q* v forward 16 j. p J! P7 N: j: I* |5 U
set energy energy - 1, }9 J; c# c! N3 h8 _
]" R5 ^- |1 n1 h5 b9 j$ z
end
, Y5 q, L. E: `to setup-patches
( }9 J% g+ H# }2 g8 {) W u( I, l* l ask patches [ set pcolor green ]3 M( X( D( k0 F+ d7 x& Q
end
: O+ ?1 v. A Yto setup-turtles
. |5 J; p& s2 Z6 O& H create-turtles 100
+ y0 W- x% l1 G2 P) z ask turtles [ setxy random-xcor random-ycor ]
! S4 C$ S/ n! V/ Iend
# q0 P- ~. M& S& H, sto eat-grass
8 e0 x; j1 H1 F) U9 {. k8 \ ask turtles [
; ^' ]3 z0 S7 n. a2 v/ @$ @. _+ n if pcolor = green [, c: v) ^, x# r2 H) ?
set pcolor black' C9 U# u2 |/ L7 o: p& r
set energy (energy + 10)" m2 e% C z* B4 @" Z
]
. V; Q3 `* s9 p2 F ifelse show-energy?/ G$ a$ x6 S8 h: |& s* s
[ set label energy ]
& C- Z: t$ R3 ~6 Y8 H; j [ set label "" ]& j! G1 ]6 h$ f1 ^& ]4 j0 o
]
3 v- A. [+ @1 m xend
" Z! S! Z. N& e7 q9 U4 yto reproduce7 Z R3 S# J9 q8 S6 h
ask turtles [1 C: o6 B% a2 ^5 j; ?5 r6 [6 z
if energy > 50 [
/ i: W$ T5 U. C- s+ K W6 d; b, n% l set energy energy - 50
6 W C E- o( m: v" r hatch 1 [ set energy 50 ]
2 o) ?/ l/ W1 p7 W- C2 c; G ]. q4 T8 ]6 ]8 s! S
]
6 s4 _+ o+ b5 Y1 w+ U1 Jend2 y. P/ q: {4 F' y7 [
to check-death$ N6 b5 }* b3 }9 v" `
ask turtles [ {/ K6 k$ n3 C1 p/ p3 o' O
if energy <= 0 [ die ]
2 t4 p; U1 y+ o# M$ { ]
# C' u# `7 S2 s" P+ N, ^& qend
$ ~/ G R/ N0 d: }6 C6 U9 _to regrow-grass
& K4 _/ {1 f7 W1 R6 d ask patches [
! O$ E" r8 q M- z+ ?, x, \5 D if random 100 < 3 [ set pcolor green ]
4 ~3 w7 q5 \% v7 h7 |' L3 l ]
4 `+ Z2 B n6 J- }5 }/ B6 Qend
7 s0 r) ~! E4 y, Y7 Ato do-plots
6 t& y1 d, a: m5 K& M set-current-plot "Totals"" W9 G4 \" O N5 W, a2 k4 d0 z# C
set-current-plot-pen "turtles" l% d2 G3 N j
plot count turtles
8 H( Y6 s- X; V5 y5 r1 v set-current-plot-pen "grass"2 e% X8 W) b! H! ]$ H
plot count patches with [pcolor = green]
. x1 q9 \: S, H# @8 N( |) Tend
. E5 p4 t# g' ]4 f2 J可是运行时提示no such plot: "Totals"" c4 R# n! ]8 v, h% o& K
error while observer running SET-CURRENT-PLOT
2 G7 j' Z' g6 w5 O3 _ called by procedure DO-PLOTS
5 q7 `; ~3 }) W) |6 B# I W called by procedure SETUP$ P9 }( \) `$ u5 R- N
called by 按钮 'setup'9 V( p. d! a% u$ F/ i% W+ Q) `
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
