我编的程序如下turtles-own [energy]
# O6 h" Y0 }0 N2 \( ?$ bto setup( z$ e }5 e6 W! i$ |* O
clear-all) n, C# q) G# G9 N2 D* O$ _5 }
setup-patches+ U3 X/ Z* L8 \7 G1 U w6 A
create-turtles 100
8 l5 O, b5 G6 N- z$ r: F) R6 _ do-plots2 F2 d2 h, \+ ?" W7 N6 _
ask turtles [ setxy random-xcor random-ycor ]
$ ], p" X" r1 r+ k! f. }6 J& Nend" G: k, o- v& F
to go( ]9 y6 j, E) h1 o9 @$ r- E
move-turtles% `, b6 q. Y& G% ]% X* {
eat-grass7 U, J2 D6 {( F# A3 v% X% V) g% W
reproduce8 P+ n4 S5 L9 i. O9 }3 @
check-death* r) N" N: m( Z' o, a
regrow-grass
& h+ I/ F8 ?1 o2 C2 W do-plots
0 t5 A0 q! U! C" B* Lend
0 Q8 L3 V7 Z6 ~7 R, hto move-turtles
- b2 m" n% d5 m6 M2 o4 e. ` ask turtles [4 \. ]$ U$ q( P, I, n
right random 360: E2 m3 Y0 M% q( P' v. B% ]+ H
forward 1. z$ s9 D) `* L9 b8 G2 E, |7 Q
set energy energy - 1
8 \9 t) D" A) Q- [' Z ]
) E6 r8 I$ N5 h3 w) eend0 _. y/ W! L5 b: ^4 k. F+ T
to setup-patches- [" Y: \1 w" ?1 d" D& e5 m
ask patches [ set pcolor green ]
5 T `( E9 h8 V% F( Nend
3 z+ z" W3 i# M# Pto setup-turtles1 Q" A/ t0 H: J% X- N; ?
create-turtles 100
& G, y$ Z8 j0 D3 ~2 @ ask turtles [ setxy random-xcor random-ycor ]/ C3 r W R& Y [- H* d
end- [8 N/ B3 j+ |" }
to eat-grass1 v0 S4 _0 ~$ p: w
ask turtles [+ [2 Y7 ^. c6 g; m
if pcolor = green [
! p% K8 w. n( s3 {5 j& d set pcolor black
( y; }2 u2 T/ S" _" ~ set energy (energy + 10)
' N z1 v5 F4 h3 G ]
Z$ B; [0 y; h2 o$ P ifelse show-energy?
* c/ |$ Z8 S: P1 H, ~1 _! V [ set label energy ]1 B9 g! l7 L2 W( c+ v
[ set label "" ], v: E6 K1 s7 Y, J7 |
]4 V; x# W+ j6 o
end# n. h* ]. S- S7 r: L O
to reproduce: e4 r2 d# e) S3 a1 z1 m
ask turtles [# ?5 V2 n) l: q, _1 c: l5 a. O/ S
if energy > 50 [) U/ @/ O3 p3 e6 L$ S
set energy energy - 50
6 Q; {$ O5 G3 ]7 T7 b! D hatch 1 [ set energy 50 ]
3 U' S" V. L) ?7 C3 a. F ]
8 D5 }& }* ?3 o" b+ D ]
% Y' A% `/ o- ?8 F) Gend
! D3 I: O U9 ~- U2 _% H# ?. Wto check-death, Y: ~! {0 h. H) ^
ask turtles [
1 [4 g: }4 l. u. V8 s/ k7 b1 b if energy <= 0 [ die ]
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end
/ F& p6 w& l& p5 z! Nto regrow-grass
! z6 s$ M5 M+ w- P ask patches [
* W) t) D C' W$ m# G if random 100 < 3 [ set pcolor green ]
; x; k( s4 U$ a ]
% D, [ _! d! x3 b* v2 }end: O ^( E" H9 N B$ @( M' ^
to do-plots
7 X. ~3 n3 r$ e: \, H( m set-current-plot "Totals"
- \7 ?8 a8 o, K" X3 K set-current-plot-pen "turtles"
! A9 g1 R( |; i plot count turtles
: ]4 H- C! O& {4 c& ] set-current-plot-pen "grass", ~; v& B' W- @
plot count patches with [pcolor = green]' Z; {3 f7 a! q& U
end
+ V' c) H1 D3 r可是运行时提示no such plot: "Totals"$ z8 v7 s8 v8 [7 A$ F% R$ C
error while observer running SET-CURRENT-PLOT
) T, C( @7 q$ e" e- _" D called by procedure DO-PLOTS2 [- \0 T, O8 N7 F
called by procedure SETUP9 I" g8 Q' ~1 _4 m: n# @
called by 按钮 'setup'
4 n/ U: ]4 s! x$ `2 O U! m2 H求大神解答啊 |