我编的程序如下turtles-own [energy]
8 |$ @ W1 c. m6 V* Fto setup+ o( U+ Q& |: _+ |* D
clear-all
! V% [0 Q: r$ V' ^* p0 e* s setup-patches( e3 z B5 F) j' @0 f! o
create-turtles 1004 g3 O E+ }) C% T3 j
do-plots
0 Q! k4 D# q& A ask turtles [ setxy random-xcor random-ycor ]+ {& _4 W J, P! u" N
end* a+ y4 S' v( o8 b' M8 A# U$ x
to go4 E/ l4 n( M, u* d; n
move-turtles
5 i4 E" l! d i7 ]: {% i eat-grass: K; H7 e' Z/ o
reproduce& x: X: w1 W$ V% P( l5 P9 x
check-death& x, A2 |$ A, h, E0 D
regrow-grass
; B7 A% d8 p; Y4 }( z7 \0 r' R* C do-plots9 ~0 u: V/ z" D0 Z
end
; b4 f7 j% l8 p0 tto move-turtles
# C% W" g1 s1 S a# I) [" G9 b4 { ask turtles [
5 {9 W( ^1 j% r$ `7 w9 T right random 360 X/ A9 }& r; y4 J4 i1 B0 `
forward 1
9 R. O: b2 d0 i1 {# O, e set energy energy - 1 Q. B& E% N \6 T1 D4 W. c
]$ ~4 X; s# }8 Z6 t
end
Z }* z/ R2 s9 [# G) ^1 qto setup-patches
; n3 Z, `" p% ?0 Z, E# J8 i0 { ask patches [ set pcolor green ]
8 R* K: L8 P2 ]$ Eend# ?3 ~8 }, V/ v+ w" b- K# b
to setup-turtles k" V' e- E+ Q' ~9 R G
create-turtles 100
T, A+ {) Y# W3 x( k ask turtles [ setxy random-xcor random-ycor ]
/ h& \2 }% f* n x6 fend* @7 k6 U( w% J9 [
to eat-grass4 |5 j3 Z! l, W& q6 x4 i4 \( W: h: ^* N
ask turtles [. y/ W- q& W6 J( p. K9 R
if pcolor = green [6 @( u; L; Y3 |' _! r0 z( Y3 y
set pcolor black+ j9 f* j. l. o* a$ P
set energy (energy + 10)
$ r' y8 j4 h; v: j) R0 |1 x5 N$ v ]
) b. P6 }) o9 X( ^8 a5 f- { ifelse show-energy?
# W; v$ N& Y4 Q0 E, R/ _ [ set label energy ]
# T2 h I+ z P. m' V/ U& a [ set label "" ]
, P3 B% z( H4 z' c9 y" v* D1 O: ~ ]! l4 e# v, s9 X3 P* B) V
end
' R w: C- V/ \/ m2 Jto reproduce, A9 |) m ~) k7 O( x5 ~
ask turtles [
4 `. |% ~- q" J, N& q6 P if energy > 50 [
9 r, W2 a; g, \0 `2 @ set energy energy - 50
* _: x; @/ L8 J" X hatch 1 [ set energy 50 ]2 U- m1 L9 L$ g7 r5 p
]# f5 D9 X* a5 q3 Z
]
1 ~! ?1 ?/ C, Y" [# t- ?% Cend
, q) ^( l- i- T9 D) lto check-death. r- Z' a- K* p [- \
ask turtles [, I) M! Z3 ]" c J# \5 Y) o5 ?
if energy <= 0 [ die ]* P9 w P6 b" R, h0 ], \
]
! p9 v& c/ l- @) N7 Zend% z2 u1 T' w/ `1 T+ C% V. f
to regrow-grass3 X* \7 z. s7 J4 N
ask patches [/ R0 K4 k% T+ ^( _' s9 S+ V
if random 100 < 3 [ set pcolor green ]3 P; |2 q: R, N' Y2 w
]7 } Y+ [) ~5 C- {
end
4 `. e( k6 n! N- f$ K$ tto do-plots$ o! k* L+ f1 V+ p" c
set-current-plot "Totals"
/ S# u: N6 F2 V+ m4 D/ w set-current-plot-pen "turtles"
2 [" `* C4 w2 c plot count turtles0 p& D; \) k! ?4 k- g- P; _
set-current-plot-pen "grass"
0 N6 q0 l; [ a, D! L: X plot count patches with [pcolor = green]
# p0 s/ r" E! u) y+ aend- j/ x( e: r7 y! L( C" z
可是运行时提示no such plot: "Totals"
- \3 L/ z- S( U' b# derror while observer running SET-CURRENT-PLOT
1 ?" L, x& l+ i6 | called by procedure DO-PLOTS3 k9 k3 V) S& S' M3 A
called by procedure SETUP+ Y; L M: D1 R
called by 按钮 'setup'
2 L4 e8 B3 ]. l- q求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
