我编的程序如下turtles-own [energy]$ N5 ^; w0 ~8 ~7 w$ D
to setup$ A3 ]8 Z5 I3 g4 h' D/ y. e4 x" q
clear-all
8 z0 L9 \& g) v setup-patches
; E+ ^ _; L; R0 ` create-turtles 100
6 N( M7 r |" i2 }/ ~! \ do-plots1 Q" ?1 V, U" s- M: m0 v2 y
ask turtles [ setxy random-xcor random-ycor ] k# s0 `2 Y4 @' u& V3 n& q
end& Z" E8 k; N8 |9 A9 V V% e
to go
/ X4 q# Q% Q, F, H3 T8 V move-turtles
$ e. ]* m/ i# C! \2 k. M& N eat-grass
8 `0 O' Z6 L8 c1 E reproduce
- I3 @1 ?. \9 ?% u8 i2 R0 B check-death
/ f% E; Q8 U! |; a" m) r" C regrow-grass
0 ?8 S% v; x7 |8 L8 D8 c$ O) p; r do-plots1 z: g3 q( H! \) }& l# d
end
# r. O5 q. z0 z5 f7 u6 t$ Z( \to move-turtles" |$ ^8 ?7 g w# S/ e6 C- T
ask turtles [- J- a* _5 C0 P$ O
right random 360( X/ W' ?1 Y5 A
forward 1
7 @/ R8 A& t5 P" x8 f; A set energy energy - 1" i+ f3 i' A, Q( x0 a0 G
]
, V+ e% l% G4 b, p9 Wend3 B+ N1 y& i8 u: J! R2 U2 O2 [
to setup-patches+ h1 `/ `' m$ g7 J
ask patches [ set pcolor green ]7 S7 [1 x6 z4 M; V
end
; m; z* l8 {7 G, }5 Mto setup-turtles
6 b: W! Y. e4 a2 p) M! }3 n$ I create-turtles 100
4 z! v |" k$ U# Q ask turtles [ setxy random-xcor random-ycor ]1 h3 Q$ ?2 z8 ^1 C+ S
end
8 z/ R/ D" c Q' |* `to eat-grass
$ c& G" x1 g& O+ L ask turtles [
- g! R7 ^9 q ] if pcolor = green [
2 r0 a/ t e2 |' B# X: u! d7 i( o8 b set pcolor black" m0 [3 d* X* p
set energy (energy + 10)7 |; t3 j J* z) w. ?) b% X Y
]
. R1 Q, q8 z( O `; H( J ifelse show-energy?) H. Q9 ^; l: P! r3 g2 z2 Z
[ set label energy ]8 U* z* D) j* N7 z$ w
[ set label "" ]+ E3 ~1 Q1 c9 _: z
]9 |, `4 X7 e6 D- u, y; C* @. S+ R
end* _$ D. |; v5 O2 E3 F
to reproduce
' {1 W: F q' a- F @8 ` ask turtles [
- r$ R* N I. [; M) ~; ~" m9 G1 x if energy > 50 [, p5 s9 U0 R9 f' |' Y H
set energy energy - 50
8 _0 ~; D% z- q# v. ~5 v( L- C) T hatch 1 [ set energy 50 ]5 @: L, o& W7 Z, D
]* q6 b- N' @( e; H u m" `
]7 Y! W7 x& K/ ? }
end
0 f! ~( d& J) f# U0 B8 | g' ?to check-death
2 Z' \+ s7 ]! w5 r5 i; q: d! n ask turtles [4 w+ h8 Z7 t2 ]. U: C+ \1 O- e
if energy <= 0 [ die ]
- T/ l j4 c! u" M ]
) i2 r" \ T7 t' X9 \end; u0 e6 d; l8 f2 E- N0 p8 l8 `1 u6 o2 u8 Y
to regrow-grass7 A5 ?! l# m# T; S+ n8 @2 i
ask patches [
5 ^' c- Z1 X2 c) c h: w if random 100 < 3 [ set pcolor green ]
/ }; q7 M6 ^# k; Q* T! v6 W ]! P2 P% i( l8 q5 Z$ [ a
end
- ?* n% ^6 A9 _8 N. I, h4 h5 \to do-plots
/ J$ q1 e/ i6 C* P. M set-current-plot "Totals"4 `7 Q( S, U2 R
set-current-plot-pen "turtles"
# @# n: o( G% L( T: c# O plot count turtles
) o! V" Z8 a8 s" e set-current-plot-pen "grass"
( t" ^& G% l0 J! } plot count patches with [pcolor = green]) C4 F* z, i L' Y
end
0 W. O, R8 Z1 \8 I- N# Y, S# G可是运行时提示no such plot: "Totals"
/ g0 ]2 M2 p( m! @8 Oerror while observer running SET-CURRENT-PLOT
7 A& t$ r, n: H5 V! O0 A called by procedure DO-PLOTS
) Y5 |4 w! w1 U8 y+ P called by procedure SETUP
0 M3 Q6 T( G8 Z3 d! C/ d( @ called by 按钮 'setup'
4 }. ]; G; R' B# i求大神解答啊 |