我编的程序如下turtles-own [energy]* t/ E+ Q2 s3 ~, M0 w. I7 [
to setup6 O( {- k/ h, j: D
clear-all( |& w" d, ~7 Y1 k+ v6 a; }. \9 b
setup-patches9 M& |0 D+ R3 `+ L+ F
create-turtles 100. `) s0 k3 ^; o
do-plots3 v/ Y8 c. W. l- t
ask turtles [ setxy random-xcor random-ycor ]
8 L. _2 x5 @2 t `- x5 g0 U. yend3 u" D! z" E- ^+ F. w+ I
to go
% J) s( |1 s- B. }* K% h! F: E: e move-turtles5 Y: G3 _+ t! W' m, y
eat-grass
- U; T# ~6 W3 a$ M3 i reproduce% R: S5 B% I. G* I6 Y$ t' D( l. N
check-death Y9 J+ [ ~0 X# r& l0 d
regrow-grass) F/ J& J: J, [; b
do-plots5 |4 q$ h% b7 u# S9 ^; C2 S/ Y
end
3 j) g0 X" Q% S$ L/ g2 xto move-turtles
+ Z; J& Q% C8 [) _, _ u1 I- x ask turtles [
/ G) X- e6 u) M* V right random 360
9 b$ I# \4 f$ v5 R4 f9 m& Q forward 10 I" G9 O' q# r3 l* l
set energy energy - 1
: r/ t5 w% t# r, s. \9 B# ? ]
" ?+ c% Z8 z9 R) vend4 ]5 Z) n1 R' h6 K j8 i
to setup-patches. r+ v! M- E1 P% k2 [, \5 v; h
ask patches [ set pcolor green ]% L: c; L f2 j+ r" J
end
- R7 X3 Z$ w: Y( n5 I% Uto setup-turtles( x( ?3 M+ S3 l! t9 t0 ~
create-turtles 100
4 ]0 g" X/ n0 x" w ask turtles [ setxy random-xcor random-ycor ]8 k* j7 t1 e+ A9 R- X6 P; P4 ^) ^ G2 w2 f
end% o" I4 w. A# k" h) J
to eat-grass
* Q5 z. o0 A w" C5 q% B/ B3 S ask turtles [
/ Y$ w; {' _; U n# |1 d if pcolor = green [
/ I8 d- |5 ?5 W/ v3 ] set pcolor black
( X' K" P5 a n% W0 N! c( l1 I3 `$ i- J5 ` set energy (energy + 10)
, g- q, }" a6 m; }, P2 w ]
6 m: z* h0 n: t$ f ifelse show-energy?5 w1 @& B3 y2 x/ _
[ set label energy ]
" `! x z: ]. u8 w- D# Y3 t8 L5 _) N [ set label "" ]( j" D7 Q: n/ ?1 J. X" Q
] g6 r q8 L2 x1 \
end
: E4 S+ h/ A, }6 sto reproduce
6 V4 i5 b H' E7 G* }. J8 \& u8 E ask turtles [( x, N0 N/ b; a& I; d. u8 t! O9 P
if energy > 50 [
( ^+ V6 |1 b" R: w set energy energy - 50* G, G) E' A. j& F! z) o' X
hatch 1 [ set energy 50 ]9 p- A6 ]% m" X4 f9 p: C6 n/ @
]3 l! ~% Q1 M* A% q1 {6 ?" P
]1 k3 U$ }. t& s5 L
end/ D/ m: C$ c0 ~- u' r3 }
to check-death
# \ K1 r# g. ^: h+ o ask turtles [6 {2 T2 o5 T9 Z, {
if energy <= 0 [ die ]
. I8 A+ c" Z) ~9 v5 a% H; l ]
5 R& H( r1 X3 d9 t2 P. h7 }end
}0 I# ^5 D, j5 x: Yto regrow-grass
4 p* }# X5 Z/ _& U ask patches [% [: x; {* m# n" |
if random 100 < 3 [ set pcolor green ]' e0 |/ u8 d) ?) f. f% q* A) Z2 m
]
, X! P9 ^5 s) u% Hend. ]1 |+ Z% ?- `0 _
to do-plots8 k \. a3 w5 |& b. C. v4 @6 d
set-current-plot "Totals"
; a5 e# {. ~1 r/ b C0 Q set-current-plot-pen "turtles") z+ k, O6 Y2 O; _
plot count turtles( c l8 e( k# l* `1 z; V
set-current-plot-pen "grass"
/ Z1 R7 u# g2 Z7 q z. M& N plot count patches with [pcolor = green]4 M, g. m* M, g1 u
end5 n( n; b; V( l7 J9 m
可是运行时提示no such plot: "Totals"
$ d# p; k9 n1 _0 b$ t Qerror while observer running SET-CURRENT-PLOT1 n/ O7 \! v" V; {. @( Z
called by procedure DO-PLOTS
# y% l% O, f2 ?1 h0 e called by procedure SETUP! T8 b6 u, ]+ K+ {3 @5 r! n- k! j
called by 按钮 'setup'3 u! p5 m1 N" [* M5 P) S
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
