我编的程序如下turtles-own [energy]
9 I& {4 ]$ O- Q& _to setup7 y8 o( B0 t8 Y% p. Q( H
clear-all$ C. r6 q; ~! n
setup-patches* @* J( d8 V* u, p; C
create-turtles 100, ~9 M( J6 P4 m8 x
do-plots0 W! N' R0 `, j0 B! R3 L
ask turtles [ setxy random-xcor random-ycor ]! o' m( c& L# J) f$ A5 V
end
4 \& e1 X' {2 I" L" t) _to go$ e. y" ]# r4 B! F d B7 p
move-turtles
9 J! K+ N7 n& Q. w2 j' n: p eat-grass2 ^, `" {* w4 M& g" x0 O
reproduce! }7 p8 ?, P& X: k3 D. |
check-death3 P* e) k' |: i+ l8 B, _
regrow-grass
# q, E3 Y. g& A9 p0 w$ ?- q do-plots2 U4 g/ E7 ~9 N, z8 p' W x
end
0 v- y9 ]1 S8 m4 W* Y. Zto move-turtles( W* e& L5 j( Q8 i$ @: k5 z3 a
ask turtles [+ J; ]: p! N" f# V' _% [- U( ?
right random 360
" q, {" E; s. I forward 16 X% F% j& K) B* e' k3 V8 u/ }
set energy energy - 1
& \. w9 _; m) n6 f" h# p ]
8 l$ r6 \+ ^2 T; Dend- G& s* K7 `* E0 d4 O
to setup-patches/ g) k. @& j; o; c4 B; k2 M
ask patches [ set pcolor green ]- w# b" z" s, P- p
end) a- [: f6 |- A9 e
to setup-turtles3 x3 y' G4 T! ]" J" j/ X" g
create-turtles 100
- R) U ^$ \3 b% b1 y7 \" D9 E ask turtles [ setxy random-xcor random-ycor ]
$ l( ~1 A" w; cend; n+ ?0 } q+ y4 s) P4 H& M
to eat-grass
' i0 O0 @; J) I ask turtles [9 @+ }" n) M# [7 T! n6 ?
if pcolor = green [, U2 ^- k |0 p2 S$ j
set pcolor black
( E$ r3 `7 r2 {' a set energy (energy + 10)
0 H& Y! P# A. N4 d2 l. o ]
( ~ J1 i& D1 J& T$ E ifelse show-energy?9 [: t8 u: Q) V9 T
[ set label energy ]
$ i# {7 I, X, a; D* L' _ [ set label "" ], D$ u0 e" V! ~9 E$ ~7 W4 _- |9 V
]% J! \$ C. B8 \; r5 F
end4 ]% S0 D' Y6 K- B
to reproduce
( a# _+ {8 b0 e% M# C( A ask turtles [0 D6 g9 i5 p2 r: F
if energy > 50 [4 i) e) A" T: K6 f) ]" s
set energy energy - 50
, R" [& _9 E) x/ ` hatch 1 [ set energy 50 ]
8 e0 } V( y" m0 Q( x5 p ]. N& d8 s, x/ h" i/ R
]7 {: E& S- z3 Z2 r5 O
end$ _, F, T2 I6 C( k' i
to check-death% Z- ]4 R7 P* K( n8 |
ask turtles [
' F: k6 u4 u' t; X: e2 S+ \ if energy <= 0 [ die ]2 b- i' m* i) F$ G! u
]
, p+ c+ p' r8 f2 |" Zend
1 z7 v) C1 l5 Nto regrow-grass" u ]+ ~4 }# G3 [
ask patches [
+ ]( l, S' r4 F* k, S) u8 W, \: P4 K if random 100 < 3 [ set pcolor green ]6 ]) _2 X: P h4 r( h' t
]1 M$ o" z* v8 E" k) s1 s
end( t6 |7 {8 `* K9 T* }! F9 A
to do-plots
; x6 b% |3 `' J i9 C2 F7 S3 n set-current-plot "Totals"
6 q' w# e+ U% o. _6 `: C: p% B set-current-plot-pen "turtles"
. e& x/ v; T6 K6 T+ _* e8 [ plot count turtles' E0 q7 G9 `/ K
set-current-plot-pen "grass"( l6 `5 q# {6 l' B
plot count patches with [pcolor = green]( e. s5 t' O! c o7 C: R
end, _$ R2 j: w; n8 z
可是运行时提示no such plot: "Totals"
" o& W# \5 g* @& a0 I. |2 E" werror while observer running SET-CURRENT-PLOT
" D- [+ S) r" V" l, ?: A called by procedure DO-PLOTS
) k+ }/ _5 W( b; ]# r% h called by procedure SETUP. j* e* v( P2 d) ^
called by 按钮 'setup': T4 Y* h+ J9 w7 w3 |$ C
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
