我编的程序如下turtles-own [energy]2 d9 l0 `$ C I0 c! u9 F s
to setup
" u' x6 ?# P n- z8 \7 H6 h5 | clear-all$ E/ E$ I- ?: v/ k- Z. l( n( ?" x
setup-patches, o* h2 p& T& }5 I4 f, D
create-turtles 100
0 E( o; j1 F+ h! L- r$ e% _ do-plots
6 F# P7 G% a! \" K$ E ask turtles [ setxy random-xcor random-ycor ]0 P) w7 v8 a% n" V6 U$ V. T- y
end
* f0 U2 x J& Qto go
8 z- {& B+ N' u% D* K8 ] move-turtles
' H8 M' |) u0 T- S eat-grass4 |8 _0 z& X, s: D8 V! @
reproduce
: q6 Q; k" o* S% D check-death/ C a1 |1 i9 R U# v. }
regrow-grass* y- y: U$ S, q& W: b) j7 Q
do-plots1 c$ L- F% I! }" ]& o& @3 X% x- n3 t. H
end, S7 I/ d6 C, F5 Y4 `
to move-turtles
' l& T9 o2 | C% w, a7 `, c ask turtles [
2 }( A- n9 U1 A6 h/ D right random 360
# v; W$ Z6 r$ |1 A: v) n forward 1+ l ~( J1 s/ ?' ~
set energy energy - 1
e0 N M6 O( f' u* b ]
0 c d D- E5 { I9 u8 ~2 cend
$ c3 h K0 \. u& n. p L( l" z4 Pto setup-patches
) |! @# Q: `/ D! ]* J ask patches [ set pcolor green ]
1 {: Q3 E$ `' \; a: kend
?: ]' T" [" C& |) O' f8 oto setup-turtles
: B- c5 k% i+ b m$ _ create-turtles 100
) L5 j0 R" S9 f6 \/ B/ m7 Q ask turtles [ setxy random-xcor random-ycor ]0 i! p% q$ @6 G ]) |% v4 K
end
4 T2 W* n' E+ m- hto eat-grass
% w* h2 ` ]& Q; y0 n3 T6 b8 a ask turtles [
' j4 @; s7 S D if pcolor = green [
2 j/ I# M6 Q$ |4 w set pcolor black3 G9 V) g( T4 j8 s5 P9 f2 r) j$ J
set energy (energy + 10)
% m+ S+ A6 T6 R( M( w( Y* _ ]
8 w+ X8 [. K- f3 b6 [3 x ifelse show-energy?0 s, w0 B3 R) e1 Q* d/ h
[ set label energy ]
1 H! j1 ^: v0 W, {5 ` [ set label "" ]
: v6 w/ J q, u1 y6 ^% B ]9 x8 g% \! ]5 M) q7 G* B) {
end4 I% E' p3 ~0 m0 N Y, r
to reproduce/ x2 Y- K7 A3 w2 \
ask turtles [: l* I" S( }$ T8 P2 Y6 R
if energy > 50 [$ r r% e4 j W6 X* Y
set energy energy - 505 g' O9 e/ B4 E F
hatch 1 [ set energy 50 ]
1 F R. [ }2 H9 `* f' f! X ]7 c* [0 H% L5 X6 P
]6 _7 {* Y& h% D8 X0 o% h
end
: v7 ?0 C h: w0 Q) O, _; u9 N: ^to check-death
, O8 M. R1 D9 _. Z. r* ~ ask turtles [
# [' v" f/ ^' X, _9 A0 ~0 A4 o3 Q* G/ E if energy <= 0 [ die ]7 B; _9 X1 \9 P" b6 J; @
]+ }# J T" O6 _
end
2 C5 {( F3 X9 I& o. i! eto regrow-grass% q/ @& D! t7 m! S
ask patches [
; \5 C- _( l0 u3 s9 g if random 100 < 3 [ set pcolor green ]# a$ w+ |/ c4 U/ Y/ q
]
2 |1 e% N0 o& }- t. k1 Qend- ~# F6 _) ?: w* F
to do-plots
- I& j# d" X/ V0 z/ K; \ set-current-plot "Totals"( m! {( _1 |) `) h2 C: ~, O6 U
set-current-plot-pen "turtles"
. G0 O" |* b- Z; U' ?# H. x5 w plot count turtles+ @7 w% }1 y* H. o& H0 `
set-current-plot-pen "grass"
8 p3 T# `. t3 d8 C plot count patches with [pcolor = green]
( h! V! r% q$ fend
( W1 o/ F4 T+ G3 a2 h; t2 Y可是运行时提示no such plot: "Totals"1 J" |6 O& d* E2 i$ `
error while observer running SET-CURRENT-PLOT. f# z# i: f- ?% g$ S+ u: u
called by procedure DO-PLOTS
$ f9 O" b& P# N+ I8 Y Z$ L$ C called by procedure SETUP
7 c- F: O2 [) W3 x0 Q( c called by 按钮 'setup'
) M7 |5 R' P6 h! M$ q1 A- K) K7 e求大神解答啊 |