我编的程序如下turtles-own [energy]( p- e5 T$ S- U+ v/ ]
to setup
: d3 j- M% G( m6 h2 y6 [ clear-all; a/ Q% v; a- H- m- V. e% s; U
setup-patches. W4 Z& Z/ K3 G; v) d
create-turtles 100
2 A8 l( l: s4 z( X9 I do-plots- @$ }3 r* q) [8 F
ask turtles [ setxy random-xcor random-ycor ]+ v6 T, W* d3 @# `7 T
end( m1 F, W1 W3 r. K7 W
to go
% {& x1 K9 D. d move-turtles
, D2 R" e8 `( O4 X# P7 s+ T) F eat-grass
- F7 V( z. s! K1 j0 |; h2 a reproduce
+ T* e) a' I! C8 x check-death
+ [5 Z* w* E8 Q- t regrow-grass
7 O; n0 M- C& o7 [* i, q do-plots
6 c( W4 @; O$ K* W$ n2 S/ {' fend0 F2 C2 H, e& }+ ? n8 s
to move-turtles
4 s P7 ]' C# F6 u ask turtles [
t2 {- Q7 V {3 O4 y right random 360/ T; A% I* X4 Q# j: W3 f2 V* f
forward 1 i( ]7 |3 k ?+ T/ G
set energy energy - 16 T# ]0 L% `' @3 b3 _
]
7 q# M. n2 y$ C& A2 q& B2 Eend% y; Z* U, f. K* ~' F7 f* ] \
to setup-patches5 ~* M( z, M/ N% u+ k
ask patches [ set pcolor green ]
4 M4 Y5 b5 d7 ] A0 [: n0 B0 e& h& uend) k- s( y, ]1 p4 U
to setup-turtles& j6 ?2 @; L, k
create-turtles 100, ?2 v3 }6 a1 ^9 O3 Y2 C+ ~* n( s
ask turtles [ setxy random-xcor random-ycor ]
7 ]& R; e* o1 u4 h- F \ Qend
5 K. D* x3 p/ p2 ~to eat-grass4 u6 j4 ^- z$ B0 u/ H) R- R2 a
ask turtles [
4 T- k8 H& {1 |$ C+ [# M if pcolor = green [( Y+ s3 J0 j6 {! I( c
set pcolor black9 t- ?' m( k* e) B; t1 B: O! B
set energy (energy + 10)( Y7 E6 e# U7 A1 V
]
" {, h" b, A$ g) a& V7 A3 _& } G% S: ` ] ifelse show-energy?
! N8 B' y, d: @. I4 R; ^5 h [ set label energy ]
$ w4 L; ?6 M1 o [ set label "" ]
+ \7 F& x# C H6 ?! w ]
6 Q! U, \8 \$ f7 F$ qend
8 y* R, b! @4 Z1 Cto reproduce
8 g+ s% [' g1 W5 Z# c ask turtles [
: y/ Q- h% D4 c# d" t7 b2 [ if energy > 50 [
9 b- D+ Q! A# L( W/ c+ A9 N set energy energy - 50
, _( G. T: O6 l8 M% g hatch 1 [ set energy 50 ]
8 R# I1 i! c; O2 v1 u! ~) e ]) }& a! @9 F/ @
]
; h5 ~/ v6 D% M" b# `# Gend
* a( h b; k- t3 @to check-death
5 t$ N% D/ J( T8 m2 ?2 m- }+ G ask turtles [
' _- i% \3 w. T, r+ q5 g if energy <= 0 [ die ]9 Z2 h5 Y5 m" w! k4 Q; U- j* T
]
+ v' P9 ]. `3 Q7 u* B7 Qend
9 L A9 c+ {, B( z" N8 eto regrow-grass9 n9 s' n4 J9 g$ Q8 i: P e7 B
ask patches [! r+ k* | ~" [) i( ~2 L
if random 100 < 3 [ set pcolor green ]) G( D7 g0 S6 D5 u4 M- J7 o, O
]
4 R9 }9 X% P. i! M' Pend. }" v9 s& I; T. y& O# _: D
to do-plots' F) e4 H( v' G- i% t# y5 y
set-current-plot "Totals"
- Q+ q# Z5 x6 Y7 S: D2 E) } set-current-plot-pen "turtles"; [6 o1 ^% ^( j) l9 F4 v
plot count turtles
, _" R. S3 ]8 Y; |9 ^. _ set-current-plot-pen "grass"
8 p6 p1 Y3 x+ E' b1 }/ [ plot count patches with [pcolor = green]. O2 o4 ^, d* k8 ^5 e6 h
end: n; n! G8 j) f
可是运行时提示no such plot: "Totals"$ ?' a% T) ?/ ^4 k) k' e* I
error while observer running SET-CURRENT-PLOT
5 ?' y1 m9 M: W. C) t called by procedure DO-PLOTS
( s+ _8 h, q( C3 V called by procedure SETUP
( q" f/ G7 d3 M8 m) K, t called by 按钮 'setup'
: E2 {0 o B. D2 I5 l求大神解答啊 |