我编的程序如下turtles-own [energy]
* j& l1 y$ p0 { hto setup
# x& R. o* j, j6 T clear-all0 z0 y9 Z7 `, v/ y) e8 x
setup-patches
) h9 n: z: H" R+ p3 u create-turtles 100
8 f5 j7 w: x3 V, }$ p: [% B' z9 W do-plots" Z; I) Z/ e# h/ C3 g& x9 E
ask turtles [ setxy random-xcor random-ycor ]- G% Y; U4 i) F8 N5 Z3 i; t+ D$ j
end% ] h4 Q$ C- s& I
to go
* r: y. Y) ?+ y% j* ^2 S move-turtles
5 x0 t' Y7 \$ [0 n8 m- E& ? eat-grass
. L+ B* o; G- p" Z% O reproduce# k* Q; ?/ y8 l/ |7 i# _
check-death3 d R9 f. r7 L W7 r! V# e
regrow-grass
! F, V" t; a7 P" z( T do-plots9 O. b C, I! ~2 t6 x: E. n
end" y" L* ~5 c: c4 O' K
to move-turtles, b7 F$ U! f$ N8 i2 J
ask turtles [# G# m' I- K8 @9 ?9 A: u! H
right random 360
" ~3 _9 ?0 [+ ]/ F" S: W6 g& ~ forward 1
/ d! d7 d7 E- V8 x0 h. s set energy energy - 1
* _. s: ^+ b$ A$ {1 B! ~; ? ]
% o' i& y; a1 _3 q' M* uend& J. A, { p4 Q
to setup-patches8 |: r& F, o; }3 s, X0 D9 p
ask patches [ set pcolor green ]' R; v. I1 c1 C" m2 C* L4 X! a! d; K
end
" ~ w# t% N0 ?: B2 e |to setup-turtles
8 L6 n- k2 h: o$ I4 W) Q create-turtles 100
) M, _& U: f7 p. x; M ask turtles [ setxy random-xcor random-ycor ]/ D1 j6 H% j! h% Z4 p
end
5 @+ O ?" U- X* X4 zto eat-grass
, _7 m- H0 B7 J. }4 T ask turtles [3 g7 i1 U& ]/ `. f5 R0 F
if pcolor = green [
0 y+ g' A, H" f, A6 @ set pcolor black
8 K; {1 k% F! S& D; p! B! h8 A set energy (energy + 10)
8 S9 d( Q4 c* W2 c- V& l ]
9 b2 H s6 P0 V5 \ ifelse show-energy?
$ M0 ]! ]2 v6 I3 H [ set label energy ]' R S: y( u: \3 S
[ set label "" ]
* }/ y5 Y8 Q z ]
# a7 Z4 t) ~, Q* `end
' L6 R8 H7 T# L! ]* F5 `2 M$ Ito reproduce
k3 K% ]$ E( |3 z K# j0 n4 k0 Y5 g, L ask turtles [$ f" b i5 G8 ?# Q
if energy > 50 [
- O W. P: |- f6 u% V+ j set energy energy - 50: Y- a: l7 u2 }3 p
hatch 1 [ set energy 50 ]
( @+ R2 q- L0 {* b! \7 \* G8 C2 W9 J ]
! Y7 K# O8 R- [- |8 W3 Q ]
5 A, h+ D5 U: _+ [% Cend
) B6 W+ k$ S* x5 f7 kto check-death+ k- v, I4 S' x. ?5 O& j- @4 N
ask turtles [7 E3 ~- s4 Z6 Z! R; u7 g- v
if energy <= 0 [ die ]
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end+ Q; r! L" D( _0 s: k- H
to regrow-grass
+ n% L" w# y. b+ _ ask patches [
% N& k. m" M4 O1 n6 B! M if random 100 < 3 [ set pcolor green ]$ H! D5 I9 _+ M$ }. y/ K' m# Z
], I3 o. h; I: Y: ]+ n/ k( B) i
end
/ W2 G/ B! ^4 B I) {2 }6 Z3 Yto do-plots
3 d: L% K' p2 F1 ]; b set-current-plot "Totals"
6 T: }# w3 r( O# C! i. u set-current-plot-pen "turtles" a7 { [' y" V. g. L$ S
plot count turtles
5 g$ ^ {9 @0 @* y0 O! D set-current-plot-pen "grass"; z& Z; B; ~7 C
plot count patches with [pcolor = green]# o h; z9 V. X! A- k2 G' e, y
end- H3 j4 J: _* g8 }- C) M( D8 a
可是运行时提示no such plot: "Totals": r6 f8 T" l, q, A
error while observer running SET-CURRENT-PLOT
2 i1 B! ]1 B4 m2 U called by procedure DO-PLOTS) b! y3 |$ V5 m* G0 G4 m* \* s
called by procedure SETUP s/ L* N: F/ N+ f0 J
called by 按钮 'setup'
8 D& ~ S4 E- W' J1 }求大神解答啊 |