我编的程序如下turtles-own [energy]3 X1 \, q4 k( c: S) ]( H' P1 n
to setup5 v+ A; e4 T& X! m& F1 r. {- J
clear-all* r8 g! M$ M% n1 @1 }5 T$ ]
setup-patches
) B8 a: O$ q( q/ d6 N% o, [! K8 F create-turtles 100/ y. ], R9 y9 Z0 `9 B
do-plots
" z. [+ }* T7 v+ x; ?+ B ask turtles [ setxy random-xcor random-ycor ]
9 z6 ]. \# n5 G! Tend
! l, \5 I$ S7 \& dto go
' h) w& O: i% x2 q. p move-turtles
) M; M) A: V; {! n6 K eat-grass* b3 V- c/ F% g0 ^9 ~6 B' e8 ] A& f
reproduce
5 i( d8 D; o! x0 C; c- s2 j check-death
% _! ]3 S3 H6 Q$ O8 Q& W4 p regrow-grass
2 S! @ n1 _, @' {; x5 { do-plots" Y3 h& F9 H) G6 @
end
+ M# C9 X& s4 D: n# R D' kto move-turtles. u) V/ G: M5 y7 N/ n- x
ask turtles [
5 M+ }. q- g# x4 w right random 3603 b* N- k: P3 {* g2 s
forward 1: K9 `: W& e6 f
set energy energy - 1
% C$ O y% _& S3 g$ ^ ]: e: y3 K c b# P2 H' d, M
end/ C9 M+ [" l5 {2 [+ C5 ~
to setup-patches
w5 i) v- \1 A7 ~" U ask patches [ set pcolor green ]( S8 x: _( j6 ?" b0 [. Y
end3 w- n5 {& N$ `* F. m; ^
to setup-turtles
5 }0 Q# j+ g2 f create-turtles 100
" V1 ^) q9 Z, I. M* Q- C ask turtles [ setxy random-xcor random-ycor ]7 F+ |) J7 H4 N& P. S
end
- }1 S7 i/ J% \% cto eat-grass" ]" v5 Y2 B& `- q6 O+ |- _
ask turtles [
3 S$ K, h, y/ h$ M if pcolor = green [( } V& `$ f) ^0 q+ c% t
set pcolor black
( a, i# M) J) [. Z1 T! W( }5 Z# ~ set energy (energy + 10)
% X* W! R& @& ^7 B* n+ _* } ]% ? n7 [: v+ Y" [. ^ V7 R
ifelse show-energy?
6 W: }$ ~2 O. A" q5 b [ set label energy ]* E. u+ w* `5 A! D9 P# M
[ set label "" ]- a! c9 l+ N% N7 x* F
]% R% J9 L& |* Q7 p/ H3 K8 b4 Q8 A
end! A3 M0 s1 y6 e4 P$ y+ s- M2 @
to reproduce
; O" d6 d( o5 A2 e* J ask turtles [
8 X( ]4 D! Z2 d if energy > 50 [$ [) t! O; ^+ y) ^. H; x" M
set energy energy - 50
u3 v! ]: b( M$ V& H: p hatch 1 [ set energy 50 ]0 _6 z3 y: z0 g1 W
]% _' k, e' Y* \# }
]
P$ o6 ?+ K" Fend
/ |5 d ]$ P g/ F2 b' B! d. f4 f( Ato check-death: G" [" W$ `' D
ask turtles [
0 |& p' y# \1 A' D, d5 g; i% i if energy <= 0 [ die ]
/ |' ^ R9 K8 j( [% x ]
: V! [. r# V! B8 q/ i+ aend5 t4 T' }1 U# f$ Q5 g/ L5 }3 |
to regrow-grass
! e0 y6 I# N2 E# c ask patches [
/ Q% U6 f' n" _1 r' c3 m2 z- E if random 100 < 3 [ set pcolor green ]
5 T+ s5 E `3 o3 r& e8 D8 \5 ` ]' t) m3 S6 X, d% D, |' W# U4 `1 \: i1 g
end( \8 h9 z* q8 }. B5 N
to do-plots
! c1 o: Y/ c: W/ T+ o set-current-plot "Totals"6 G) N: k E# H# K; E, r# r
set-current-plot-pen "turtles"' {+ E# T! k. m6 `- ~& v1 g, ^
plot count turtles" o+ n' f: X2 M& w& n R4 Q
set-current-plot-pen "grass"" T9 R) B3 V# i3 L# F4 Q
plot count patches with [pcolor = green]( a7 I8 x# a* U ^
end
Y* I/ S' m5 C/ |8 j0 q可是运行时提示no such plot: "Totals"
" U. Q# P# _3 l. F2 d( l, Nerror while observer running SET-CURRENT-PLOT
: k2 H: H* I4 H1 h6 o called by procedure DO-PLOTS
, g7 q2 ^% z2 l# c called by procedure SETUP6 e; A& `! O, ?9 h0 c) D2 g! r
called by 按钮 'setup'
^# S' Z' Z% [' o/ I i3 O* M求大神解答啊 |
[复制链接]
楼主
发表于 2013-5-29 00:25:38
