我编的程序如下turtles-own [energy]
+ k8 J/ @( X5 B4 ^* q0 `to setup* h0 a; u: H0 i* L5 L3 B! w( i
clear-all7 s- o$ I; Y/ ?8 n- _
setup-patches' `6 E! o1 b0 w6 X' N8 \/ j) p1 p
create-turtles 100
# W- d* }3 e* w4 \5 B R: L" Z do-plots8 `+ a0 G- D% F7 s$ D0 \( h
ask turtles [ setxy random-xcor random-ycor ]) p$ O0 O& I, C: n
end
9 F3 j% o. M: V' Dto go
! C- u/ H% E O7 z5 c4 y move-turtles. Y8 @" G6 A/ q
eat-grass
1 T. l F) N" y- c2 ~" v& ~ reproduce
6 Q( t7 s/ o' c2 V8 B check-death
- i4 f7 [5 D) z/ o7 A, Z! c" M regrow-grass
@" @4 H4 Z& w$ S( { do-plots
0 U8 r% E. s" `5 D q. ~end
+ \' k% s" p6 c$ W8 s, u! yto move-turtles3 X; _- m2 j% b# [
ask turtles [# t4 N; Z5 s- j6 i2 t" p: ~
right random 360; J. |$ f5 y# u+ N
forward 12 a- A2 G3 }) E" Z3 |5 M2 v5 a8 x
set energy energy - 1; ~6 {3 ~3 ~# _ ^( u1 B
]
1 n+ v2 y. m1 uend
, G$ f3 \# k4 Q! }* yto setup-patches' r( Z2 G3 o8 A, b6 z7 f5 I# @
ask patches [ set pcolor green ]
1 n6 F: ~. n% ?, a- p8 ]end1 [. G" t1 v3 w
to setup-turtles# f0 k' G2 P' W9 T- J
create-turtles 100
2 p7 d6 {, a. I! W8 T7 X8 R ask turtles [ setxy random-xcor random-ycor ]% m- P6 W# }8 m! Y, X
end
' g" Q5 i2 r6 e* L* T! Y" C4 gto eat-grass) K4 Q$ I* H0 v4 n4 T
ask turtles [
, Q! ]8 n( T0 W( z+ r if pcolor = green [+ {3 s( d0 y# D- z3 S; C1 M
set pcolor black
& K. Y7 _8 y4 @1 b' l3 Q* | set energy (energy + 10)
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ifelse show-energy?
0 v7 S" q9 o" |: \# J9 o: r; I, r! b( ~ [ set label energy ]* Z* j) f ~) k* U6 E7 h) W
[ set label "" ]
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end
: ]* ~( e2 E" T% w Vto reproduce4 @5 [, i, e" N$ a! `
ask turtles [
1 O, Q/ D0 X% ]6 G [/ ` U# v! g if energy > 50 [
J" M/ ?5 Q# j1 I set energy energy - 506 X) F! n. F% \ t* a* A" s, k# ^
hatch 1 [ set energy 50 ]3 L5 W: |7 v% U6 }% y( l
]
) `' ?; q( F% z, ` ]
! v G b. H* b( w$ }' o. gend
0 A! g9 q' o- y! e8 n0 R6 Jto check-death, H' E; ~8 N/ G) e2 d- y
ask turtles [
" l# z2 a! ~. U4 I& t if energy <= 0 [ die ]
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end6 N* W5 j8 i" W' O- w5 k. x) G6 X
to regrow-grass# u$ S+ P, ~: c8 B( a$ r$ B8 t/ J
ask patches [; A4 }0 Z* W. @$ [$ G7 E4 q
if random 100 < 3 [ set pcolor green ]6 S6 d: A" e7 J) z& |
]& r. z0 U, A# ]' |9 [) V
end
3 D, q0 J3 e# S4 Oto do-plots
4 U& w G- _$ J7 p0 a0 _$ p6 x set-current-plot "Totals"3 i* O& \ @! d: m6 K
set-current-plot-pen "turtles"
/ @0 P) P( Z# U Z/ A6 ]0 K# S plot count turtles0 u) W8 {! j# ?
set-current-plot-pen "grass"
$ ~( Y& j/ d: n4 [1 ~! h plot count patches with [pcolor = green]
- a, S: b! h L9 m# ]; ?" D/ \end
4 F; {8 `5 i5 u可是运行时提示no such plot: "Totals"
/ U) Q' y% e1 i8 k& [. cerror while observer running SET-CURRENT-PLOT
- p$ m0 |. h: W) x called by procedure DO-PLOTS/ S) r6 X# S( p( ^
called by procedure SETUP4 D! I8 L- W& s" G5 R1 s$ m
called by 按钮 'setup'
, c" S1 k- j, C6 n: J0 G求大神解答啊 |