我编的程序如下turtles-own [energy]+ Z3 u) A" ]# F# c$ b
to setup8 C! k b$ c/ n$ H- d! n/ ^ _
clear-all
4 t$ @) j# @' H: ]$ g' o+ a D setup-patches
" H4 O7 A% W: m! C create-turtles 100
' Q- S4 q9 ?) D9 ~. v do-plots1 m: ]) ?& x( i
ask turtles [ setxy random-xcor random-ycor ]/ t! F S; S& c# I' x6 K
end/ `/ W# R Z: K/ L# t d; |6 t
to go7 ~& ?8 R2 q: x' Z+ R
move-turtles
* U# a7 y3 H5 i# h eat-grass
; U# R" K- t7 L5 @' H reproduce
! D7 `& c0 S0 b check-death
O5 c# V1 q: N* F$ n/ X8 \! E regrow-grass5 ^* a8 I8 [# m9 A
do-plots
% m( `& a8 M& p# L7 }end- G$ H/ E+ b4 d0 I. g
to move-turtles
, a9 z7 M2 v+ m! v3 o5 b9 g ask turtles [
9 _0 G5 h+ M* U6 L: @ right random 360
, L) m _8 E& F% |; a forward 1
+ R, |8 J- W. m( R9 S set energy energy - 1
% D5 d) {* M$ ` ]
( Q. A4 F' x. A7 v `- fend! r% m1 K9 x7 i/ r }/ c0 w" F
to setup-patches
$ u- H8 ]* H9 n ask patches [ set pcolor green ]! G% z4 x6 p2 G2 V% A" U
end, e# ^: O# Y# Z/ y5 k$ F
to setup-turtles
( D# g/ b, E- U create-turtles 1000 D' }, K8 U* c) g
ask turtles [ setxy random-xcor random-ycor ]0 \$ ~+ p' |9 ` `0 m
end
$ R% I! M* x2 K7 D# k( U* s( A4 xto eat-grass# G3 `# k8 O* }
ask turtles [
0 ?) `# i8 |, Z if pcolor = green [# y; w- k0 Z3 W2 c7 M- |; z1 T
set pcolor black
) w/ O9 O% e: x+ K+ @+ p set energy (energy + 10)
% b) L6 ~: z9 H& V ]/ O. S0 A/ f4 q" S t' F! R
ifelse show-energy?2 ^1 b1 ^- r4 G* t) O+ k) [
[ set label energy ]
/ q' j+ `+ A* M( u( W; T [ set label "" ]" k2 Z3 D0 R# q1 h
] u V1 E4 }: k0 ^, N
end
) F0 E% D2 ?+ s& r4 Oto reproduce d. C; q, i4 G% A
ask turtles [4 n0 @) b6 ]9 v8 b$ j2 E @
if energy > 50 [$ \7 r4 ^ n9 p$ \. Q, K( F
set energy energy - 50
0 D7 h8 P2 X2 [, C& F2 M" B; L hatch 1 [ set energy 50 ]1 ?: [4 }# W! S# n- W
]+ J/ D! y0 l7 j/ v7 ]- Q$ i0 z
]; M$ k7 i; K ~0 A+ f! u8 R+ N' z K
end- I! H+ t% Z, r; x
to check-death
( w% t) m K0 k ask turtles [+ z0 z4 V% v5 e% p1 J4 x! L
if energy <= 0 [ die ]
/ o; u i' z$ b+ F+ U+ t' J4 F ]! l9 J% E0 M8 a
end
% \: k+ o! J9 u- {to regrow-grass
0 O/ a; S, T* G/ E8 ]1 P1 o& F ask patches [4 Z9 c7 [. f0 n. v2 Z
if random 100 < 3 [ set pcolor green ], z8 l( `9 h4 Y/ T: y4 s, G
]
) C7 n5 s5 W: w9 N6 _end" R) W! u6 _' y5 _3 ?- A
to do-plots
* w* L% k8 o) T& e* m set-current-plot "Totals"
8 x5 z; \+ L* E1 v. P set-current-plot-pen "turtles"
4 h6 z/ E( Y) v8 a plot count turtles" U+ T) U6 t: @
set-current-plot-pen "grass"
* {# |+ X8 y5 r- h, i plot count patches with [pcolor = green]1 \+ [" L# Q9 [; H* V
end4 D/ a4 H+ @, c3 G- L
可是运行时提示no such plot: "Totals"$ ?/ x- @9 a! J0 ]) \' n! H$ H6 l" k
error while observer running SET-CURRENT-PLOT: z8 u5 l3 u/ A0 m' r
called by procedure DO-PLOTS
. V; E; u, T& i( e" u3 p: D called by procedure SETUP l7 g2 P+ Q8 `. S9 F( g
called by 按钮 'setup': x7 j- B5 h( r+ h
求大神解答啊 |