我编的程序如下turtles-own [energy]4 C5 W ~9 u( D% F
to setup( m0 _. n2 N& f; G& I7 L6 X
clear-all
3 v: _2 `# V% Y7 g4 I setup-patches
$ G3 \$ v0 B; A, R$ d create-turtles 100
1 J0 ?1 i% C2 ?& C3 t do-plots
6 K( T- R- u# e9 R5 I4 ? ask turtles [ setxy random-xcor random-ycor ]: i% s1 w O$ ?$ X3 t" x
end( u( C7 O6 A& \, i) t
to go# n5 y8 i- L9 B; P; t; t6 e
move-turtles' [9 y$ z0 e8 A' O' x
eat-grass
" ~7 Z* ], x$ ]) j2 ` reproduce7 V2 Y9 x$ D1 `1 `* s6 f
check-death" C2 j- l2 D5 b; J/ _! v7 ^
regrow-grass# k& w$ Z" T+ L# e- f* [
do-plots
6 [, e8 F# d# M/ w: f4 T$ L/ Q2 Zend
. |) \& A0 j8 c" \! i5 q% E0 Kto move-turtles# `% B' l+ D% [$ S
ask turtles [& l0 y, s; w! d/ a
right random 3606 b0 s% f$ a1 k8 U% F
forward 1
9 f \4 p& C7 h% W8 y$ l! K) A0 d set energy energy - 1$ T9 L/ B: p( T5 `
]! o) L* b* F& W( S5 c
end
- i, e; J, z4 p4 [to setup-patches7 s! Y! M3 n* A p6 F
ask patches [ set pcolor green ]
# B( D! c, n; }( X0 s" X: `end
, M {7 m1 S1 q% _% D: _to setup-turtles# ^+ Q( M3 {6 j H5 u
create-turtles 100+ |3 o! i4 D% M D# p! p
ask turtles [ setxy random-xcor random-ycor ]" |9 G) R( j4 `4 b( f! U% X
end+ K% R1 f. y9 W% M8 x q8 G' I) H8 }
to eat-grass
5 ^1 K4 O% m4 D! M ask turtles [
! Z8 b) w3 w5 g& I& i if pcolor = green [
% i, q; u' v" H: c; X* ? set pcolor black( q3 f" j, w& c E7 q
set energy (energy + 10)
4 v& B; c+ j+ u. ]6 u+ U ]
. Q. }2 F) \& [/ |: K" t3 o ifelse show-energy?) x1 X7 O, H& M( c. T
[ set label energy ]
. _3 H2 q3 U1 q- d' g! } [ set label "" ]
& [( D) I* @' l C. `# i ]
+ I& `/ W) S4 k3 S2 Hend
' P$ x* ?5 ^ M; C' _; {to reproduce1 [( N) w9 ]4 C5 P# \/ h
ask turtles [4 i- ?; L. f* M9 e9 W0 D
if energy > 50 [! Z, O, H# S, I! z: T9 E
set energy energy - 50
/ ?0 W2 R ^5 a hatch 1 [ set energy 50 ]3 K2 x( `$ |4 K1 t9 ]2 P- P/ P W
]% y7 t" E; u. q0 X# K. k
]
; i- P2 L0 Q7 _3 s; M' g jend
8 K% F& h( |1 i: Rto check-death* r' V9 R3 N" S* f$ u+ v+ Y3 S/ T
ask turtles [, J! U. `/ ?) r2 O4 z! U
if energy <= 0 [ die ]
. ` ]! m1 L. z6 n) F, l: L ]
" i9 i' V" ~% H3 ~end. g; [4 b4 U; y$ y; M' J
to regrow-grass# v: P9 }. V7 b1 ], ?% d3 C& ~
ask patches [
, t0 t, n1 p. _0 t* o if random 100 < 3 [ set pcolor green ]
+ M- o2 @/ V8 U, H ]
% M' h( ?5 ?( B& M$ Pend' L' \' K0 Z- I w3 o- Q. N
to do-plots" D+ r/ C: p& o# p8 {; i$ p
set-current-plot "Totals"
+ V# h* M7 [9 J; f# I9 s0 g1 l5 a set-current-plot-pen "turtles"
4 e5 t! c2 I9 N% b2 Q plot count turtles
0 B" _' G& G5 j! c$ k3 ?2 q set-current-plot-pen "grass"% D% |4 z, s, O1 q! D
plot count patches with [pcolor = green]$ e. p* |- @' U
end
3 V8 h# o6 _. x' x" g6 d可是运行时提示no such plot: "Totals"4 D7 N/ h E) y$ d6 A' }4 X) ~
error while observer running SET-CURRENT-PLOT, u2 y8 A; a8 R2 h& ~% H
called by procedure DO-PLOTS7 f, P* V8 j0 f1 v, T
called by procedure SETUP% U9 T8 V( k! H" f
called by 按钮 'setup'& B4 C E- s7 g; y1 Z: P4 J' B
求大神解答啊 |