我编的程序如下turtles-own [energy]
5 [) t. e( D4 O! jto setup$ m5 N: G, ~( ]5 R/ m
clear-all
: Y: u* K9 w4 }! l3 X0 S setup-patches
) }6 @. u5 Q* H* N* x; _ create-turtles 100
8 O9 F1 ?' P1 Y2 ] do-plots
( K- Y5 q" @& E7 B4 n+ f ask turtles [ setxy random-xcor random-ycor ]
: e% r k+ k3 k0 \# |. Y' Aend
% I3 d. H6 s4 m2 |( N$ Mto go
3 l) e2 D$ c ^1 Z' e4 X move-turtles
- [/ G. ^# B! `/ a9 k0 u eat-grass
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check-death
0 I" C' V+ u$ f7 E$ j$ h7 S regrow-grass: H) @0 e& E4 J; b3 S) ^
do-plots& K) X# y) J7 K$ ~ f
end
1 X& x: s& d, x& w( jto move-turtles% U4 E: a- W2 f/ L# f
ask turtles [
1 ]6 s R- l0 v) Z, r3 O2 r2 C right random 3608 y) A$ h2 B( ?& G# X6 O' C) p( g; u* u
forward 1
7 m2 n# q Q, y, n3 w& v* Y set energy energy - 1
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end
$ [* p6 @9 j }# _to setup-patches3 F4 U- [' ^. Q
ask patches [ set pcolor green ]
) u: p" k" r% @1 K: P& W' i6 }end+ S. v* H. b' h, o
to setup-turtles$ \0 Y3 T' {+ z5 e6 u* G) `
create-turtles 100
+ K' }; T3 V* k4 e& G/ j; O: d ask turtles [ setxy random-xcor random-ycor ]
! k+ X0 j, a7 O/ r b- Uend0 f0 X( h+ I. b' f; ^. p& c0 k
to eat-grass
4 o4 W" I& B( m ask turtles [
' X. V9 _1 g+ ~! x' @- g: v if pcolor = green [
% J' d% i' Q6 \6 k6 }2 H* ] set pcolor black' K/ t' V, N8 s0 ^) i& I2 Q0 |
set energy (energy + 10)
1 U5 r3 _6 U2 c! q ]
% d4 P Z7 h* b2 d/ K, W1 D! f ifelse show-energy?% k$ h4 [: F% z6 H9 j2 N7 x: r
[ set label energy ]' e( Q1 k$ C8 E# Z2 ^+ v* m
[ set label "" ]) O9 W3 J. n' `, |# x' i7 c+ V
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end# ]4 ^ }& i1 K0 ~2 j# i
to reproduce
0 w! h) f' Y& p- y ask turtles [- n+ O" {" `8 F* s% w
if energy > 50 [5 a3 T% _9 y5 C+ o( w
set energy energy - 50
# J; `! k* j0 }% n5 }2 w8 [ hatch 1 [ set energy 50 ]
1 C2 M3 V- `/ u$ ] ]
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end# t* U$ b6 F! `: F, h% Y0 c
to check-death
" [0 N9 _5 h: z( N6 `# G! L ask turtles [: w0 F4 `' i/ J) m5 t X
if energy <= 0 [ die ]
0 v' b, a* g: w( ^% |5 @; v/ e ]
( b- x# G7 |# W: _8 y* N9 }: Jend. l! q( N% a" {
to regrow-grass
4 \3 ^) C% C6 |* a% U4 K# R ask patches [" O; d4 |9 U8 @4 f: D9 q+ K
if random 100 < 3 [ set pcolor green ]" W- C3 U, h7 f$ `$ G! k2 K
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end* B3 R! P! \4 l/ {& ]. [# a
to do-plots7 P. c6 \/ b2 B+ N3 {' j. @7 @
set-current-plot "Totals"; r' H& k, D& c. P- y2 ]' B% {4 P
set-current-plot-pen "turtles"# _( T' [1 \% t1 s, ~- x. T
plot count turtles
2 y/ G% V, X2 P h; w4 E set-current-plot-pen "grass"9 Z' S" S& _9 ~+ B
plot count patches with [pcolor = green]
( _% J0 h# t! iend
0 k. J8 R$ N+ Z2 P/ M可是运行时提示no such plot: "Totals". q8 x. T1 [ P6 {6 [4 C8 h! u
error while observer running SET-CURRENT-PLOT
- x0 Y# V( ~7 y1 J7 h8 d/ q/ l2 ] called by procedure DO-PLOTS2 i h0 ]! d* I( a: |6 p5 ` o: b
called by procedure SETUP
& [9 r$ o! q6 W m6 y called by 按钮 'setup'
% r, H' P( _6 a求大神解答啊 |