我编的程序如下turtles-own [energy]) f( Z+ Y' H z7 J% y
to setup2 v) f y8 _ T' P6 y
clear-all4 t i6 j* n8 }& N
setup-patches
& S: H0 c1 `% h* _0 n6 | create-turtles 100
% t: }% r: h! x) c$ M% J- W0 ` do-plots
6 t9 C! |7 F6 y$ u+ E# C6 K ask turtles [ setxy random-xcor random-ycor ]
+ H5 ]; r5 @+ H3 o( J" Nend `( W. M h4 w% v) W
to go B: Z4 i9 I M% h* t& X
move-turtles
, Z+ b3 w3 q9 a3 q0 x9 `$ U eat-grass
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check-death6 B: R% N- ^8 e9 R9 k" W
regrow-grass% ], V D* e, Q& [ X
do-plots
2 p! e/ n+ ~) m' P) \: B9 hend2 E7 c3 t6 o& Q" y; H% ?
to move-turtles
% h$ y- y, V G1 m/ B0 r ask turtles [
8 _" j5 W: e9 T3 E; Z3 B right random 360
$ Z2 Z7 k2 V& q; J# ] S/ i# |9 ^ forward 1
4 ?7 W& g( m$ u8 U; A4 Z: [8 f3 y set energy energy - 1
5 K, ~( [6 x [, O( C2 _ ]6 e' ^' |3 @* i+ D2 }
end& z# l- u5 _9 @8 W( [; e ^
to setup-patches' ]9 S- I; h( `. ?, M! ]
ask patches [ set pcolor green ]
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to setup-turtles
6 Y; n! k9 h/ c' ~# e, o( H' S create-turtles 100
9 u5 S: }& ]* W ~1 o# l ask turtles [ setxy random-xcor random-ycor ]* `5 ]1 H* t* c; u4 P, K5 f& d
end
; P6 K7 r! u: V/ f$ ?" C# H9 \to eat-grass! s: t; c& t6 V4 {( a
ask turtles [
7 @8 R% U( q2 o) B( v! D# ?$ c if pcolor = green [
4 t5 d& l3 C, D3 u set pcolor black
7 y7 @- ~* J3 M2 F2 I2 a8 ? set energy (energy + 10)
5 r' _& N1 q2 v4 A! g9 _- Z ]
+ s$ |4 G( u, B/ j, [ ifelse show-energy?
" f7 v+ v/ C- e [ set label energy ]3 a; @; T2 D: c
[ set label "" ]
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/ | K d: y0 b4 S. Z& fend
' r* e4 j" i# M! z3 M& Q+ dto reproduce( u# n/ n; X# r* ?
ask turtles [( c2 v6 x7 k: s5 `
if energy > 50 [
) B; w9 N5 {6 H b$ G set energy energy - 509 E6 l3 U+ C/ N: m% p! m5 L* [
hatch 1 [ set energy 50 ]% p, u! G4 Q: T* f2 |
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]
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to check-death/ d4 f& A; @5 y# k1 R
ask turtles [
: m# j( ]8 l9 ~ if energy <= 0 [ die ]
7 e C5 Q+ T0 ?# m0 m ]9 i ?8 V- s- A2 d! | ], \9 x3 h
end
5 U; T7 L" r/ g# m2 vto regrow-grass
- [9 D' Y! N$ Q, e ask patches [2 b( H: Y; f) F9 W
if random 100 < 3 [ set pcolor green ]& A0 G8 n& [* ^' b
]- Y( `& h1 z0 n" p% g
end _+ _1 P% T5 P5 M' ?) D7 y2 q
to do-plots
( @# S; y* \: P4 T, a4 b' b set-current-plot "Totals"! L- U7 X2 F$ H- g8 E0 t, c8 o
set-current-plot-pen "turtles"
, p5 [ p' P# S4 h9 X plot count turtles2 J- @, r( m- R; @7 a; i1 o
set-current-plot-pen "grass"
( |( s0 |% j8 w+ W plot count patches with [pcolor = green]9 K7 D5 B8 u; H3 |
end8 S& d* H) u, p* n. }, j
可是运行时提示no such plot: "Totals"
# ]1 g7 s( r' Y% ]3 t8 _* Yerror while observer running SET-CURRENT-PLOT0 O. j: V9 ?- I4 u
called by procedure DO-PLOTS4 ~2 d, W& F; h' k+ ?# ^, G1 Z
called by procedure SETUP ?% a2 H3 W& W
called by 按钮 'setup'! q0 f% t( T" F1 I
求大神解答啊 |