我编的程序如下turtles-own [energy]
# a' v* E! k6 y5 T& [to setup3 p# z! J* F7 M P
clear-all7 T2 X, l2 `9 s3 s5 p6 r8 r( s1 |
setup-patches, h6 g9 R# u7 E
create-turtles 1004 Q2 u A3 x5 |. ?7 F: a
do-plots8 Z3 {: b" S- ^
ask turtles [ setxy random-xcor random-ycor ]9 f. X$ W6 Q. ]0 p
end- o* I: c% y8 J$ Y& J5 z
to go
/ D3 _, K. p+ \ E* W* |* n& } move-turtles# ]; R$ O0 r' U- P
eat-grass
$ s" u6 H7 [; j K9 t0 l1 p reproduce
. n7 \4 u6 p6 H6 U8 f; G check-death
; ^- m% w- P; V! r0 d regrow-grass1 g( J* `; G; G, I6 t1 y
do-plots
r8 Z; e1 ?. Z; z% _( p7 Nend
' ]. o B9 w+ L% uto move-turtles
4 ^+ t; B: d- F ask turtles [/ [1 A" C' s# o9 G& ^3 A0 k+ r' f
right random 360
7 H7 n5 y k5 O/ Q5 \" e( j4 | forward 1
9 u- Y; N; g! j3 K set energy energy - 1
/ s# l0 Y o, X# F8 a$ n, Q ]$ |7 y- F' n' Y2 S- A$ ~3 q" F! w
end
4 a3 e- y t% C0 }( cto setup-patches+ f# M- a: _# [' I& x/ B7 v3 [
ask patches [ set pcolor green ]
9 E! V. u$ H1 l8 uend' \7 G& j' `' C' y6 y* a
to setup-turtles
! U% ^3 n. x3 Y create-turtles 100
; c& Z* Q: ]- F! m0 b& w ask turtles [ setxy random-xcor random-ycor ]; \) W$ d* W9 H
end8 K7 G) v7 {* O% ^- F0 F
to eat-grass
( `( q0 T; _, a, q+ {; \ ask turtles [
* o# D* J6 e! e# m; I if pcolor = green [
' F6 U& n' ?" r9 z set pcolor black
7 {+ }* ~! P# a; ]5 [" i set energy (energy + 10)* U+ d1 g$ ~/ X; N a
]
; u0 r# V" \1 a; @ ifelse show-energy?6 S( M! p1 h1 W% S+ J9 \
[ set label energy ]6 \6 m, v$ c; Z, P0 e
[ set label "" ]
8 E2 ^+ u! s8 p ]
+ \" s6 e) K& L# m& n1 j+ v) Send
. I5 F+ g2 O9 b/ j3 X, Lto reproduce
5 E$ x- F& O- \, j& | ask turtles [+ s7 i& C8 Q/ N; ~) ^
if energy > 50 [
( o* Q. |/ K2 Q- j6 S2 C set energy energy - 50
" _* m6 D; c) G8 G r hatch 1 [ set energy 50 ], s5 [4 h7 l1 D- B5 U
]
7 Z; F9 C! I7 h i2 s& I3 B; N ]5 }% B* i) o& x
end
/ ?- G3 ]: f" ?+ oto check-death. [5 B: J, E) ]
ask turtles [% \- H! V8 A. {3 k% @
if energy <= 0 [ die ]1 }( g0 l3 A9 U7 c0 M7 c! R* V
]
% ?% N0 s/ i+ Zend+ Y; `+ M p1 q* _6 {0 w# m
to regrow-grass9 Q9 ^# \+ W2 d: R/ c- V- c
ask patches [
9 r6 I1 X5 C( N u if random 100 < 3 [ set pcolor green ]
6 g) C8 @. q/ E# d3 J/ c6 y ]4 D4 ~+ i7 U- K" ?) l
end2 }4 @! ^, Y3 Q( `( G
to do-plots% I6 P z# L: G6 L( e
set-current-plot "Totals": N) ]8 n: v% q/ Q w
set-current-plot-pen "turtles"
7 G2 B* b( C, n6 Y plot count turtles
, ^. q. a. N5 E- w set-current-plot-pen "grass"
; M' o! Z' c5 D1 Q, }7 t5 D- q plot count patches with [pcolor = green]+ w( ]" e7 ?& c% @, M; C6 K
end) a$ c3 m; u, N1 i$ t. S
可是运行时提示no such plot: "Totals"
# x) ~; X T; V; g- h- ]/ Werror while observer running SET-CURRENT-PLOT" L, g9 C; H1 I. c' |
called by procedure DO-PLOTS
9 W$ h4 [- J2 S5 f& p called by procedure SETUP+ \- d/ h' P9 N& d2 k
called by 按钮 'setup'7 g3 Z5 { r& C! p. ~. r
求大神解答啊 |