我编的程序如下turtles-own [energy]
( X P2 u. k, Q+ L$ D: r. qto setup
5 E# o! D; N; Z1 g, q" @ clear-all
. f7 r3 u# u, v* t setup-patches
6 O8 I0 o2 y' q create-turtles 100
/ T: l& ?# P# c/ T4 K n- v do-plots' r# y" T" Q8 o8 v. K3 F% T: Z
ask turtles [ setxy random-xcor random-ycor ]
5 O( p, |, Q0 ^5 bend5 @ K4 \( Z0 T N5 ~
to go- o3 ^4 ~" V8 ~8 y `
move-turtles% L6 G3 @! F( {$ m% [$ z, j0 S2 I
eat-grass( e6 _* L& r& F2 x1 a6 Q9 I$ O8 Z
reproduce- n$ h; w( t, |
check-death
5 f Y4 E8 m* `5 t5 C/ z# | regrow-grass
) ^! G e- Z5 H+ D# D' o/ z do-plots
1 a9 P* C4 J8 kend
/ L; f1 U5 T7 n) \to move-turtles
' {" R6 g& ?: r' Z: P. v ask turtles [1 r* C& W. Z6 v, j. y; U2 [
right random 360( O+ `$ k G5 F- a3 [1 H; _. y
forward 1
4 X! X1 A# `, B7 ` set energy energy - 1/ O" _& F. c, V$ ^" b% @
]
0 h# I. o$ |9 `* C6 Rend- E4 Y1 F) Z s: N
to setup-patches
2 M, L+ `. L E. g ask patches [ set pcolor green ] Q# @8 p7 K0 A2 K7 v
end
/ @) C% \7 \ ~# pto setup-turtles
5 `+ y: U; [: _2 N! M create-turtles 100
9 h+ S6 ]' j/ v ask turtles [ setxy random-xcor random-ycor ]6 g7 R- t5 j" q# T% @" ] ^, a* a
end! |3 H! [5 i; h" [: B& ?
to eat-grass5 D4 l- Z0 V: b) c; \9 |) A9 u8 k
ask turtles [
/ J8 c) R$ S8 o if pcolor = green [4 b$ Q$ l2 {2 A: Q4 w
set pcolor black
# S: j, ?8 ^3 }7 F- @0 f set energy (energy + 10)
% o+ S, O3 g9 Q% ^% ~ ]
2 y& a7 j) ?1 _2 j ifelse show-energy?+ i& g! w: N0 D& s: f; M
[ set label energy ]
: j1 f. S( Q' k% S [ set label "" ]) h4 |) J0 V& c, l1 b
]
0 N6 {) _1 Y/ G: M1 ]end
3 A* k! h }! rto reproduce
' \: H2 ^( S% Q: z ask turtles [
& Y9 W/ m# l) b' J: l- U" O if energy > 50 [
$ q" i0 N: O" g; j ~5 C' D set energy energy - 50
G5 ~7 ~+ a! t$ X- o hatch 1 [ set energy 50 ]4 z/ t* c/ N$ t. y
] m/ ?) j0 N% s3 o3 S5 X8 V3 X
]
$ [1 A$ j7 Y, g; Q" f! f2 h3 W0 O" Lend
* D, n. q, t% l3 N* o {* E$ A* xto check-death
* O3 e# v( _4 _: Z4 ?* @! H ask turtles [
! Z5 o2 K9 K' ? P3 |1 W if energy <= 0 [ die ]
/ b5 P R Y' O ]/ ^8 M. c( Q; t& z/ A& V
end
% R7 h/ u, K* `. }1 f! R# _2 H: _to regrow-grass) ~7 ~# F @; b, k' N
ask patches [# a$ e E) G- |0 f/ k
if random 100 < 3 [ set pcolor green ]
- S6 S: J' I) s, z. Y ]
+ b7 [; u. h2 _0 z7 c2 iend& o0 w% T8 o/ I1 b T* x
to do-plots$ G5 _! j! w* ^, }% L$ U1 u1 z
set-current-plot "Totals"
: s# A5 e6 ^% B" i9 o# i set-current-plot-pen "turtles"$ B2 c- S1 ]" D- J+ O$ [5 u
plot count turtles& Y( A o6 y* X+ r- o- a! X# E
set-current-plot-pen "grass"& I2 }6 J/ e+ T$ }% P& F/ u
plot count patches with [pcolor = green]
5 f! K% D2 i3 _end+ a2 W( x! ?9 T& g- t
可是运行时提示no such plot: "Totals"
4 D1 w, t: q* y/ cerror while observer running SET-CURRENT-PLOT7 Z% M4 w. w$ W4 Q) X
called by procedure DO-PLOTS
- P/ B" z9 `7 R" a. N6 Y: m* n called by procedure SETUP
& @# t8 o- {! y3 M5 U6 u called by 按钮 'setup'
7 d- N$ B. D4 C0 ~2 u9 s; x求大神解答啊 |