我编的程序如下turtles-own [energy]
4 j, |& @6 \! W0 B0 n Y# oto setup5 U" ~# ?- {+ F p1 W& Q+ e
clear-all
1 G5 Y6 {7 }" z7 }* B8 ]7 U! ]" T setup-patches: A d' J1 ]5 ?0 g' i6 c1 q7 r: T$ A
create-turtles 1000 |: [3 J8 s6 T# C
do-plots1 ^0 {6 M$ q) q( s9 x: m
ask turtles [ setxy random-xcor random-ycor ]
7 z5 t* G: z& L' }end
$ l7 r; @- {4 tto go
2 t a+ D+ S+ | move-turtles
' B* n( w7 t, E# |7 I/ O eat-grass
0 F4 `1 O& ]2 ~0 X* y( h. x/ Z' B reproduce; {2 \( O- W1 B* C7 W* k2 m* y% l
check-death
4 J3 ^6 _5 s/ u& f( O regrow-grass
. z- t* T; u5 j0 I; ^; O do-plots2 c1 d* _+ }) W, a
end3 Q3 b# f& `9 [2 p
to move-turtles3 U% j( d8 [9 ^& R
ask turtles [" B( M, x) c/ p9 O
right random 360+ V9 z3 Q. N T4 F, }8 }
forward 1. z% {. {* M8 W0 ]6 t
set energy energy - 1
4 P( ?/ z0 h2 m1 k) C5 H: R/ A ]
* _, V& n p' d0 ^end4 ]( \( P0 a, J1 W* d( O8 T) t
to setup-patches1 l4 @0 r" K6 W5 C; t# ^
ask patches [ set pcolor green ]
. `( D, J' { \$ V6 n m- G6 \+ R$ Tend
! @1 i( F& k- Vto setup-turtles
# G5 q7 F+ n3 H2 l R2 G create-turtles 100. m5 S% w5 U& G
ask turtles [ setxy random-xcor random-ycor ]. N2 @- \& |+ q! V" ^3 K. {' |
end, q4 Q0 A3 ^+ p+ H* O" R
to eat-grass
" |" I8 K, K4 b0 i; b9 | ask turtles [
: G5 K7 m8 B( B! ? if pcolor = green [7 C2 d2 s# k# s# l+ Z2 k
set pcolor black
3 O+ n7 ] H1 `9 ^, ~ set energy (energy + 10)# T& V. A6 g/ x" `9 \
]+ a" c6 y0 p7 p! m9 \( x
ifelse show-energy?
. u$ H# Y. ~5 B! t: h J- I5 ?" k [ set label energy ]
, A% K$ l, D3 C/ [ [ set label "" ]
; z7 o8 g$ d1 x% P: O. P ]
. H5 N0 _) u* Z1 G: G0 Hend
& d# N. G# O+ t7 x: zto reproduce6 {' Y% Z- j+ H0 o4 n9 s
ask turtles [
# P }+ I( @5 r% {' ?. k1 ~! V if energy > 50 [
- C+ W9 I2 c; t+ F! x, u% J& Y set energy energy - 50
; I: Y" R' V' x, Y* E8 L hatch 1 [ set energy 50 ]2 }' f; k' w1 ^/ _" |5 U, i8 B
]& Z( e& }$ c8 k; x$ u2 b
]
6 }+ `3 l1 q6 d& o6 \+ Lend, E- o* I* x/ i0 u( b& N
to check-death- D) W! r( d; @0 F4 D: T
ask turtles [
' {1 n! o. ]9 s8 w2 [" K2 j& o if energy <= 0 [ die ]( ^" w4 p8 i5 e$ a, q8 P7 E; ]
]
# K1 x* P0 C) k& bend
- u$ f3 ]3 S9 v/ ]6 A: |to regrow-grass
, c: X" j$ ~: ]% x: g, t8 T$ _ ask patches [
) D. I( T' _ I$ d/ K/ } if random 100 < 3 [ set pcolor green ]
7 j8 o3 ?) O6 q$ L. h8 I/ \ ]
" g. C0 i' l. V/ P+ Y8 cend
# u# u5 F% z7 X% U$ Xto do-plots/ h C% H% M/ U
set-current-plot "Totals"6 v. v. Y1 i, m' C9 F8 e8 k; R
set-current-plot-pen "turtles"
8 k5 g% i4 @1 j" @+ D; \5 _ plot count turtles: c) e0 }, i6 I3 p9 K) c
set-current-plot-pen "grass": s8 F7 w6 Y' M& j1 y2 d, _
plot count patches with [pcolor = green]6 l8 F/ k/ N. I* S" S0 m/ P
end
5 p; @! d6 g. _# M9 f; n可是运行时提示no such plot: "Totals"
# ]( |+ y& C; x% Z5 R# v4 e/ T$ nerror while observer running SET-CURRENT-PLOT+ K$ P2 y! s1 G! _& I
called by procedure DO-PLOTS+ \! R1 A- D/ P/ u9 o/ R) W
called by procedure SETUP
" B) h0 c6 y! S, r/ c called by 按钮 'setup'
. c7 F& y6 S& N3 S: s$ t$ {求大神解答啊 |