我编的程序如下turtles-own [energy]
) W. D) x4 W1 ^8 hto setup# ], A2 [) U3 b
clear-all; S' \+ P$ _6 _. O
setup-patches
% g% t8 z2 Q+ A: N- a create-turtles 100. }8 U! j# i5 T+ \5 p) {; H1 b* h% J
do-plots+ R. K; e/ z0 ?' i
ask turtles [ setxy random-xcor random-ycor ]& M$ B6 w+ q% @# U% ]: o
end
8 Q% C9 O, ?0 c7 E: ^ Q- ~to go
7 \+ a$ _1 {1 B; [ move-turtles# \1 W3 A. h/ u# _* c) w
eat-grass( t! Z# B8 n* u8 F. f
reproduce- I' E. p! `, o1 ~
check-death& ]$ s+ T- {& z4 R# u
regrow-grass; h# [$ R' A' E8 z, t
do-plots$ p+ q6 z, Y: c i- K. ^
end8 _! B6 e3 J& Y9 N% ?
to move-turtles4 {" V6 B |) T2 y! G' w
ask turtles [7 b9 g/ ]% w" ]' R! I
right random 360
& {" G: k/ D+ m forward 1$ d! u3 g! W) {% v* j
set energy energy - 1
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, C! X1 C1 b9 n S) eend& D. w: C* X% z& Y1 [$ e( F5 R
to setup-patches! X4 j/ Q0 m! y1 {
ask patches [ set pcolor green ]5 F3 ~% a" o5 f# `; q9 G, W# {
end
6 W& D- F9 G% v; \8 Z% oto setup-turtles
" |( a- w) \' {0 V2 x* n* ? create-turtles 100/ O$ z0 @+ \" [+ k% Y( h
ask turtles [ setxy random-xcor random-ycor ]
5 z6 B9 ^$ x! m: D' d p' y$ L" Qend
M3 S7 I7 I9 c& Fto eat-grass
x( T0 Q& r' F) M+ r$ V8 G6 z ask turtles [6 u c- t# A" \4 A# S+ _
if pcolor = green [6 J+ v4 ^* r$ U: S/ C* d3 W# g
set pcolor black- I1 f' w3 j" p
set energy (energy + 10)& z2 U$ b+ P9 d. j" H
]
2 c& n7 E* g+ |* G ifelse show-energy?
6 h) z( G; ]/ F [ set label energy ]
# c* A6 _, U1 r, R5 s [ set label "" ]
2 J3 z6 c3 ?5 j: |8 e7 }# n# i3 l ]
- e4 J1 I, n- m) o; Q2 z' Z1 hend' U7 B% P! r" W* e) f
to reproduce
3 Z* |4 | I8 [ ask turtles [
2 ~; O: d" r4 n2 H if energy > 50 [4 [% n1 ?& f0 w; y4 p
set energy energy - 50
5 r6 D$ @9 c* y2 x2 M' W hatch 1 [ set energy 50 ]* W/ j# J$ \, h
]
# H" Y B8 k' \. n" C ]
) H0 n. a; m& o2 `( qend
; [; V& g& V( mto check-death
7 J) n9 r) J6 o ask turtles [4 v$ W5 C! C7 m+ |
if energy <= 0 [ die ]0 u* Z+ B6 t& a+ t' \& |# {
]- j( O% @" V+ b2 _' p; ~! C! G
end
* h; ^3 R3 D# Lto regrow-grass
' R, q2 a v# q9 ^4 J" S ask patches [ ^) }( z, v5 L W% n) n& ]
if random 100 < 3 [ set pcolor green ], X! p6 ^' M' `. N. \1 s6 n$ m
]
9 Y, I' ], U0 W1 oend
4 Y6 g8 n, c4 |to do-plots! c5 g' ]' L# y1 E( d
set-current-plot "Totals"/ q6 E! M3 ?# r( {, M; H, f! j
set-current-plot-pen "turtles"2 N6 A' H6 t9 n- g* k2 [
plot count turtles0 k* _. G' I; R- P
set-current-plot-pen "grass"
1 O6 y9 T* m/ U8 {( K) b plot count patches with [pcolor = green]
3 V9 s. ~, z$ j; \end4 k6 {: E: z3 y" f$ h3 ?
可是运行时提示no such plot: "Totals"+ u- ^8 [3 p% z% Q
error while observer running SET-CURRENT-PLOT% \0 M' {8 n$ o# M) k# Y" y
called by procedure DO-PLOTS; \/ g' a) W4 m# Y: \/ F
called by procedure SETUP) @5 Z( \4 a! c4 h2 D
called by 按钮 'setup', e- y! K1 l. @/ A; s4 z8 g
求大神解答啊 |