我编的程序如下turtles-own [energy]9 A6 R( b! B, G
to setup! a0 r1 i8 a* R; Z8 C. U! |
clear-all
# l7 z$ f1 [/ H0 W& b# M setup-patches
) D% w6 [* s; I: o& M6 p3 z create-turtles 100
8 _; S5 k4 e& ~. s do-plots7 q% ? p- R4 C: s
ask turtles [ setxy random-xcor random-ycor ]9 B0 X' x) a+ O7 ^9 T. p8 Z% J' a
end, f; I6 j% c. ^6 I j! c3 B
to go$ S8 l' h. Q, x# o6 M( \% ]
move-turtles
! p# F! u8 T H! |0 Y) [/ q4 c. E, I eat-grass5 P" B! C, m8 U; F; Y8 O
reproduce
: g5 C6 I/ B1 `7 J% | U- { check-death8 j* B6 X/ I1 P' ~ f
regrow-grass
1 u" V0 S2 H/ F+ h4 x7 t' } do-plots4 l# B- G. S4 E7 W7 }
end. j! h, X6 h$ s3 \" V/ j0 I
to move-turtles! k/ ~" i J2 }0 {2 t; W
ask turtles [
3 y* Z7 {- p& S; C$ B right random 360
: i3 G: M B% [1 g) {/ b: Y5 T- d forward 11 f* Y; S4 H% j0 ^) A
set energy energy - 14 a6 D2 x( O+ h; a1 S
]* Z9 U' G; z0 s3 q% o
end
1 ^2 N9 R6 Z) T5 Pto setup-patches1 a4 d7 ?" l5 H
ask patches [ set pcolor green ]
+ d1 a9 Z9 ?' k( M9 K3 M/ R+ a' _end
. O- l8 j: h) r. _to setup-turtles$ z- X4 O4 i. \/ _
create-turtles 100
3 o/ A2 r4 p; N9 Z ask turtles [ setxy random-xcor random-ycor ]* D, g9 J+ Q- r3 g+ w2 o
end
6 |6 y* q2 M b0 }" `to eat-grass/ @; L7 R9 D0 ~" j4 l! S ]0 ~
ask turtles [2 U$ W. F4 ]( D# Y& N# Q
if pcolor = green [5 T ]7 N' E$ n- ?( K6 M3 ~
set pcolor black
" t. a/ m- \% g( P7 @ C set energy (energy + 10)
/ d6 g8 N3 z1 ?% |7 k ]
7 c$ ?% D% v1 x1 z. {5 N$ o/ n/ p ifelse show-energy?2 u. ?* M3 n# b8 s
[ set label energy ]
% o, @" |6 B) R. C$ ^0 V" X8 M& Q [ set label "" ]- Y2 I$ S0 V. {2 ~" _
]# j" L$ p/ F6 L) L7 S) Y" Y+ u
end3 V2 u* S% @7 u9 s
to reproduce
% d0 ^$ @! H* ~" Z ask turtles [
9 p) H8 i+ O3 A9 g8 s1 e! ?' j if energy > 50 [! _, J+ w0 e u; ~3 `
set energy energy - 50' q& X- C) f2 a% n
hatch 1 [ set energy 50 ]1 u% N: N* }0 N- K* S8 A& S
]
5 Z. ^1 V; T. g ?; X: n ]
6 k; i7 D3 r6 t d. p; Send5 i, ~3 p2 z1 x | v" j
to check-death
$ \3 i: d7 A) P5 K/ | f/ e ask turtles [
* p; b9 E5 Z+ I. P; J" r if energy <= 0 [ die ]
& |& X1 q) F9 O/ x ]
/ b# Q) l6 W8 ]. iend$ q D/ A- ?) l4 R
to regrow-grass
* k0 q2 t& f4 ~ ask patches [ A& I' t3 n( Y% v
if random 100 < 3 [ set pcolor green ]4 D% D, E1 J5 }7 W4 h# A# B3 @( e
]# f, v) O- a1 f! x b1 A
end0 q% i! i% S% w8 G
to do-plots
. v& N$ L" P0 b8 A& [ set-current-plot "Totals"
$ v I9 |; N% N9 C# M( L% a. V set-current-plot-pen "turtles"
[# i3 [% Z8 @3 X9 ]7 g# ]# ` plot count turtles
0 }$ X6 D) M) `# G" G0 ~ set-current-plot-pen "grass"
( o4 a+ G; x. P0 @+ V9 ]+ r' v plot count patches with [pcolor = green]
6 W9 J$ ?4 _" }/ J- O& fend
/ X' [/ K$ ] j% p' ~9 ~$ w+ A, ^可是运行时提示no such plot: "Totals"% \* B7 U6 q6 B0 G: p1 }
error while observer running SET-CURRENT-PLOT) S7 {+ k4 f. v# m( F2 ^
called by procedure DO-PLOTS
4 j3 M$ X/ P2 O2 K2 v) Z$ r called by procedure SETUP& p+ Z0 \2 s( ^5 z
called by 按钮 'setup'
8 K0 `6 T" v, o0 B& `8 \求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
