我编的程序如下turtles-own [energy]
9 A# r2 G2 @/ `/ vto setup
{* M: s) o; m1 h( m Q clear-all% B0 E! e4 N& f, q# i
setup-patches% T7 \) A$ ?2 T0 i0 ~9 l. |
create-turtles 100
7 I' G2 S7 e. w D1 ] do-plots
6 U" C3 ?# _% ]7 P/ I$ y+ j6 S, ]) f ask turtles [ setxy random-xcor random-ycor ]
5 \+ u9 o/ v8 Q7 q' y# J' Oend+ V6 |0 v. Z0 @' h
to go
) e0 X# I0 J: k& s7 _1 |; B7 G6 I move-turtles
# W2 K8 ?4 N$ w eat-grass7 G: w9 ?" |# Z7 l7 ^: u$ _3 A
reproduce9 o+ C' G% ^+ M: b' }
check-death2 B' J. O0 C3 ]" v" N9 v7 N2 |& i
regrow-grass
$ b$ V( D5 U, t5 R2 h do-plots
2 j/ h7 | R6 M2 }: e) S1 vend2 U' e3 n% Y- e$ Y' y+ G( X
to move-turtles9 n- z: `! F* k% o
ask turtles [
1 `2 T) q* m' i, x$ Y2 G right random 360
3 ~/ M5 o y2 _; |* k4 u forward 1
/ l! D, K% P% L+ X, a! a set energy energy - 14 X9 M* V- r9 R7 d: i% k' n
]
3 I( f- ]' l. t4 L1 fend
, X0 i2 ^/ B" g$ Y5 Pto setup-patches" i. }* z0 B6 f) }7 s. O. D
ask patches [ set pcolor green ]
5 q# K: M ~& cend5 [1 E. B" T( P0 N! ?: e9 a( _
to setup-turtles; B, N2 s0 R8 H& `
create-turtles 100
. Y: L. i1 \" O: K% ^6 L ask turtles [ setxy random-xcor random-ycor ]4 Z+ h. _5 s: D$ a6 F
end
% V1 p$ f+ Z+ Kto eat-grass, |, y3 j$ O$ V9 y8 F
ask turtles [" Z2 J* k3 Q% a! M$ o+ E
if pcolor = green [
1 n! S- O" v5 _4 C+ o set pcolor black, [) _6 ], O( C) Q8 u3 ]: [6 L
set energy (energy + 10)0 o$ ?( E ^& y6 [" W& M/ G5 v/ u
]
' z, b- }% p) s# [ ifelse show-energy?
0 W9 Y4 G1 |. l8 F- Q [ set label energy ]
% p( b$ D4 V! W( R e1 } [ set label "" ]. e) L/ `$ V' x, z P; |
]
. R2 Z1 p1 L( d5 s( v Rend
, K; `- d3 ~- sto reproduce
( Z5 [6 [. b$ w, i+ Z& k( O ask turtles [, u# @3 ]" |$ x
if energy > 50 [
8 U7 Z+ H# W, K set energy energy - 50$ B2 L+ `8 u' d: L+ \# n
hatch 1 [ set energy 50 ]6 A" L- z+ m8 Y( F5 M! ?; j! K
]
' ~4 L( G# n S7 S" V: s% F ]
( W5 |7 \! t; b: send, e- C. }7 H5 e: y Y( p& Q9 }
to check-death
( B5 l b3 w% h6 _: W" `, a ask turtles [
+ Q9 G4 T/ e1 `1 w% E. w( s: J! J if energy <= 0 [ die ]
7 e% q& V( J# Z' ^ q1 \& m# w. \ ]6 @3 l# l3 n& {( c4 N
end
5 [% E; j T) f, g6 h' x* J* Z" `to regrow-grass W, Q, w. P* i" p5 }/ f
ask patches [3 V4 h4 L! ?9 D8 y, t# w
if random 100 < 3 [ set pcolor green ]" V3 P# i3 l% Y% v% r: W p
]
# j( b) C, Y* b4 gend, ]: S0 m* L4 P0 I3 F/ h
to do-plots6 w' \& | `/ x$ Q
set-current-plot "Totals"
& Y+ G6 K" r. m set-current-plot-pen "turtles"% ]# a! ?3 w3 i( [0 k
plot count turtles
( g6 d8 \$ q, _, w4 F% o set-current-plot-pen "grass"& [8 b: d5 Q; n3 m- c/ p
plot count patches with [pcolor = green]
9 a9 A$ ]" U: {) D; vend
! n* c% K {% ?# M可是运行时提示no such plot: "Totals"% T* _# Y _9 k7 b
error while observer running SET-CURRENT-PLOT& n O$ o Y w/ z
called by procedure DO-PLOTS! g- U. w5 z& E. _# ^
called by procedure SETUP
( p; x2 [' H$ `! t) r( U | called by 按钮 'setup'% r. p, Z/ C6 K+ y6 l
求大神解答啊 |