我编的程序如下turtles-own [energy]; G1 N0 L+ R* }( \
to setup
2 \" F6 z9 k5 W4 J: v3 |2 { clear-all
, h4 a0 p2 m1 \2 `) Z3 D j: R setup-patches
" M, K4 S- w# _6 R create-turtles 100
+ P) e% X0 b% v( H do-plots" X/ L7 f- A4 a b
ask turtles [ setxy random-xcor random-ycor ]
9 A/ Y% u; k! `3 Z; U! {* nend
4 s, H" A" M/ V6 R4 }% i: ~to go: N- h- _ {2 ^. f, E; u# K; |3 E! p
move-turtles
) q' J8 t, U. a8 ?; m, d9 c eat-grass0 `" y9 N" F V: S( G1 X6 ]3 _. G
reproduce7 |2 r3 d6 |, O1 f" W
check-death
+ X$ C# i, ^! p regrow-grass# U7 G/ o6 s6 } D& N6 B) c
do-plots
% d- i% C% M; {% @9 X5 a! _end
+ a. a% t* d) @$ S) F% ito move-turtles) O/ a; Q# J" L* O$ K( h: J& n$ N
ask turtles [" r5 k4 U. {% B* F1 ^) r+ ~ E
right random 360
" ]" g6 _% C% Q- ?: G forward 1
! G+ z5 [% y; E4 Q! |5 M" s5 m4 R set energy energy - 10 B" s7 y9 ]* e: f1 W" [
]
: Q- K! a) J& r: g+ hend
6 c+ h" b; V5 a( d4 y3 Mto setup-patches
" x1 Q, N6 d) H0 C, s* W3 K ask patches [ set pcolor green ]
* x& `' ]% \8 C: P# F9 uend
1 N! |5 Z) S7 g. f( j- ?* yto setup-turtles
( N3 d4 T, p& e5 W( q create-turtles 100
/ G1 V% C/ ]( S T, ~$ S# s3 B; { ask turtles [ setxy random-xcor random-ycor ]: a9 t1 K1 N) v2 @5 V5 A6 y
end& P% l4 q: O1 v v* u& K
to eat-grass
. [9 n$ r1 |; n. C6 _4 A ask turtles [
r' @( s# M, V if pcolor = green [& A# }# Z7 x% s' X: \4 X+ \6 D
set pcolor black
/ z$ h H* Y" [8 i4 z set energy (energy + 10)3 ]' H# ]0 E! n5 Z3 R+ L, D
]
( `. x+ H! T7 L5 N ifelse show-energy?
5 d$ N; c+ i+ T6 j* `# x* p& P9 s [ set label energy ]+ g% r5 M& W/ A% d5 e$ H
[ set label "" ]" q# f$ j! k/ P6 P5 @
]
5 s" y+ ~) U4 q, _9 wend' o5 X& ], R* S+ U* }
to reproduce
8 ?3 F, o1 P2 c2 ~ ask turtles [
- q1 M: M- g. A, E3 j* r if energy > 50 [
# j; K; d8 B; H set energy energy - 50& Q; C1 O# _+ u
hatch 1 [ set energy 50 ]
' {, B9 r& [* u |* I9 S( N ]
& E z% w6 Z( R3 q ]
& r; O; D4 f! V' G5 y( C$ _' ]end" z, a2 r7 g3 c- C/ u) S& K
to check-death1 ?& L) Y, ?' N1 j
ask turtles [
: C& T; B$ b+ W0 d# i0 [ o if energy <= 0 [ die ]
0 n1 t$ ~3 i" Y ]
$ |0 N/ \8 b7 J6 Z4 x- Bend' Z5 v* @$ d' X& R4 u
to regrow-grass0 N. H# B* Q3 V" i
ask patches [. |* x* {+ [ p* ?4 \6 W! _
if random 100 < 3 [ set pcolor green ]
% j# a) B3 ^, G$ @! l l& p ]
) m8 I: r, Y, S% wend
, L+ O k( O D5 \" Gto do-plots
/ |% w6 q% [- v" ^5 e set-current-plot "Totals"
3 y: }$ X3 J: L2 D, w3 t set-current-plot-pen "turtles"
5 ]0 r, V9 ~) v% J6 I$ d plot count turtles/ z; g0 O9 J8 G, _! g
set-current-plot-pen "grass"
! d& T4 ?+ H0 ] plot count patches with [pcolor = green]) ^& E2 ^. S) c+ ?
end9 x' B: \0 A! D/ f
可是运行时提示no such plot: "Totals"2 `3 g l, a) m4 A" m3 _1 ^. X
error while observer running SET-CURRENT-PLOT( x. o0 |- i/ a% H9 D1 K; k) q
called by procedure DO-PLOTS! g) p& F2 `& H% @6 c
called by procedure SETUP
3 c% j1 X8 K% N called by 按钮 'setup'% ?: W& p9 p/ s$ \* O- S) I, n
求大神解答啊 |