我编的程序如下turtles-own [energy]- @9 Y- [" D: L1 R. _
to setup
9 M1 l. O9 A2 m clear-all
9 L: c9 [- E% ?% N setup-patches% E6 Q: ^) L S& O/ {7 F
create-turtles 100
& l9 K, J% R' d. _6 r do-plots
: G5 f* Q$ F$ F+ a ask turtles [ setxy random-xcor random-ycor ]* H7 G4 ]8 `0 F \
end' b. q4 L/ V' _: d. i
to go) k8 u4 n+ F0 J: h# }, t, Y
move-turtles# v: ?, e F O6 [ T3 [! F
eat-grass" F; M; L% A) q" q7 `
reproduce
, i1 Q' W4 y8 }# D; `& ~9 b check-death
. |) \0 A& V1 b7 V+ [& u, O regrow-grass3 Z2 ]( `% [8 p& ~5 a4 B
do-plots8 W! d8 s3 \) J
end# I$ w/ j0 _% G& E1 l! Q
to move-turtles
! l1 s7 ~0 h$ l* n2 U9 z- u" ~# n ask turtles [ ?. b0 D, e! m8 J1 `+ g( s
right random 360
) G: u' c9 ~& ~# C _/ B+ }! z forward 1
. b- ?0 q$ g; G& r! C set energy energy - 1% O! m5 p. s6 E9 n$ x1 d
]
$ k' g! a9 G2 r! n5 o. y; X- i# mend2 A2 Q: b* ?, X1 P; J* d5 `/ P
to setup-patches
# O7 V$ b0 j7 \. S! Q ask patches [ set pcolor green ]
9 G# n0 M/ ^4 E" y" x( M) o2 lend
% b0 `. U% o3 Z+ sto setup-turtles) i N0 M, o" U2 s, X9 _( S
create-turtles 100
) ?2 X+ a8 o9 o# V' v" k ask turtles [ setxy random-xcor random-ycor ]
$ j2 V4 O$ M* w* u: ^7 z6 i# L6 dend
7 F4 `2 F+ P. F8 Oto eat-grass
1 R9 w8 E3 ?; e* ^ ask turtles [
1 W7 m# o$ X/ P7 U8 |( j3 b2 @1 ` if pcolor = green [
( J$ ?* G4 r1 b0 K set pcolor black) p, @, i! P% ^* n, O
set energy (energy + 10)) e2 o$ o0 @; R/ g" j! t
]$ J' L% B J+ L3 C) Q
ifelse show-energy?
9 w# w' A1 k' \ [ set label energy ]
% ?3 F6 E; m' `: G9 P [ set label "" ]7 ?/ ~% w& W2 W& O4 B( f
], p1 C6 b8 q& C9 f O1 A* ?
end
. \! }. _/ @5 }3 O2 T3 e$ vto reproduce
* d8 y) H. `5 o: [* x* F# h; ^: t ask turtles [! N+ P9 ~6 e- F% K/ ~
if energy > 50 [& X7 \/ V6 l& r/ a( {0 w+ f* H! S; a
set energy energy - 50$ l7 H1 g% i$ H* q
hatch 1 [ set energy 50 ]
* o$ {( W6 V( e9 V2 M. ?" m ]
0 q8 y' n, ~" c2 b8 |) g ]$ K# D: B1 _! t7 w" b2 u4 f4 h" q: Q
end1 C3 }* b& W `/ g
to check-death; {& ^( h& P# r
ask turtles [4 s8 v, `+ b% h
if energy <= 0 [ die ]; I! I- W! o2 n* {& s4 k1 ^
]
) J2 }/ G7 L6 bend
$ d5 {6 l& w1 s/ g" Sto regrow-grass! L8 V1 Z. l: s+ K% {1 L9 I
ask patches [# ~- @& o1 g) h
if random 100 < 3 [ set pcolor green ]
- R4 W# h" @$ e4 `; p$ g8 A; D3 z ]
: l( F! o( w, F8 Y5 i9 ~+ Q- M7 P! R8 kend
' ~1 B9 \* f7 n1 N) L7 \to do-plots; q6 X" b/ x5 c# Y: H- V% v- S
set-current-plot "Totals"# c# Q) w9 z0 B) R& R0 g
set-current-plot-pen "turtles"
. n$ o- ]+ A$ M- ~+ \ plot count turtles
R# b: v0 ^ s set-current-plot-pen "grass"
$ r H4 E) Q$ ?' V/ a8 R5 z plot count patches with [pcolor = green]0 x* F1 Y5 C1 e% I- _! d
end
( e {$ v+ i+ o! d可是运行时提示no such plot: "Totals"
1 \+ ?8 X/ Z3 _4 X6 O7 I8 [1 Merror while observer running SET-CURRENT-PLOT
+ G1 d: U4 {- u6 a U+ b9 \ called by procedure DO-PLOTS
7 P9 r. n; \3 [* m called by procedure SETUP: |& P, ^* |' C
called by 按钮 'setup' l" O( Z( M' B4 t" _/ m, Q% l% e
求大神解答啊 |