我编的程序如下turtles-own [energy]: E1 I& g5 h) l3 L. {5 R. A5 l
to setup
- ^4 `; X' s0 Y- w* _( |" [ C clear-all% V5 Y& v" @6 X+ U# ?/ o1 o2 U4 ~/ X
setup-patches
3 [6 r2 k& }4 r* h: L0 [# f S create-turtles 1006 v0 x/ `# @# v" E' J
do-plots
8 x5 @) o. H4 A2 A ask turtles [ setxy random-xcor random-ycor ]& T# }* W2 d% \0 L @ V! x
end/ b( l! k- k/ W
to go$ X7 V& V) y. c
move-turtles6 u9 t, l1 o7 j5 @
eat-grass
# R+ B2 d: s% z6 a7 N reproduce* K# `" n" ~& e. Q: ?
check-death
1 A) R3 P9 A- ], v8 g3 n7 H regrow-grass/ P+ h0 c; }, u7 g9 f
do-plots
1 z% N0 u$ K: {end
8 l7 B+ m$ D h7 C E% s: nto move-turtles. [* w9 `/ I0 \, n/ U. g' @* p
ask turtles [! v* H' x, f) V V+ y9 F% {! p
right random 360
6 Q _/ q, g1 P. ~, e forward 1
) F Y! b! b: q8 L& ?3 Q! t set energy energy - 15 T$ V4 K" M' D+ S8 x2 ]
]5 R0 `* z; @/ z8 ~
end0 x! x% c# h3 e) e4 t
to setup-patches9 Z7 P. ?5 _5 `' c* a4 _. I$ w! K
ask patches [ set pcolor green ]
( _5 d0 w2 b0 M/ h& M: L f5 ?end* v0 P% V% k5 ]3 F! V
to setup-turtles
" V9 K9 N3 n1 \, O: A& I4 R create-turtles 100
+ H' r) V; n6 L! U( a8 Q ask turtles [ setxy random-xcor random-ycor ]" B- A6 B( h9 Q8 q
end
; E$ W6 ^3 W; v& cto eat-grass, t" I S' g3 Q4 K% O: J
ask turtles [
- c* ?, Y$ ~2 E Q if pcolor = green [: b. Z) b1 K5 C8 u1 \
set pcolor black$ {+ Q5 Q5 _; G
set energy (energy + 10)5 J# k/ |, Y0 o7 O7 V# M3 ?8 o4 q* A
]4 f: |; @0 ?! m& A, t6 q! z( O9 z
ifelse show-energy?
2 @- R/ k) j7 W6 Q% k2 c6 k [ set label energy ]
0 @( a" [4 b4 t( c [ set label "" ]5 C. z$ ^6 B0 o; |4 A6 X
]
. S8 s7 @, b! F. ]& cend5 A7 U, c9 z$ D6 C2 B. H, ]8 O
to reproduce* h! B$ |* A' i' A4 b
ask turtles [: g/ i. y) R( e6 o J( v2 O8 Q
if energy > 50 [, v; N( w- @8 w
set energy energy - 50
4 \# X& s- l$ r5 r4 D8 U& k hatch 1 [ set energy 50 ]
1 x( D/ d; T& [/ V; z* Z$ e ]9 q% W8 q q g
]" _( @# L. L/ r" I
end
L! ]7 t+ t0 H8 \to check-death' d4 h) l" n. F8 ]0 A
ask turtles [
( B: k* y# g3 x1 W2 o. n5 P j. [ if energy <= 0 [ die ]$ t! e: m$ e. X
]
$ X$ @ m& l) l3 S" U0 X9 L8 h U6 Rend1 t+ G4 A. i- L8 ~# {
to regrow-grass
; E6 J3 f% P; p4 I$ K0 P ask patches [# z5 V& x# K) u- M( R" R' h
if random 100 < 3 [ set pcolor green ]
# h7 ?- y: z4 g- l H ]
6 z4 ^, {5 E4 O4 D8 p, b- Dend
! [! M9 ?/ Y! g8 \to do-plots2 V/ Z; l9 z' a b7 D+ p
set-current-plot "Totals"
. K+ [+ a3 W H! n set-current-plot-pen "turtles"5 k4 I3 M+ ?* ]5 h! c8 K
plot count turtles
& B- ]9 R) V# n9 K1 s, A set-current-plot-pen "grass"# g; x/ b* z+ E" a9 f" I! G
plot count patches with [pcolor = green]5 l$ `! X' M h7 C+ z
end1 Q2 [+ _2 J; h# W2 t
可是运行时提示no such plot: "Totals"0 N6 a6 | w j* A
error while observer running SET-CURRENT-PLOT; _$ W& P! ?: x, R( l& ~
called by procedure DO-PLOTS
4 z/ W m& Y- p9 H6 Y called by procedure SETUP, }. Y, T3 K9 q( r
called by 按钮 'setup'$ o* z1 u0 P* z2 y% m' d; u+ ~
求大神解答啊 |