我编的程序如下turtles-own [energy]
6 r. \# Z8 K, a0 xto setup
6 d2 F9 b. ]+ O' V- n7 B clear-all7 Y0 i4 u6 _7 v/ ~# J
setup-patches! x* H& I; D+ o( C
create-turtles 1006 ^: x/ m: p' y& _ A' c. q; h
do-plots
# T6 i( ]: e v# y ask turtles [ setxy random-xcor random-ycor ]( B/ w. n6 E* V+ J, W
end
/ Z7 h, t8 q& Q8 z5 j- J5 i7 Pto go- X5 h5 A% h5 l" c" R
move-turtles
" N* v3 G0 K. c eat-grass! R2 ~4 ]( h# B0 Y" N
reproduce
9 v* w' x" v; e" k check-death2 T. U8 b% a7 f+ s
regrow-grass
" t7 p+ w! c" g6 T3 w" ? do-plots9 R; B0 o. s9 [9 R* q& k0 F1 Z
end& `3 j- Z8 Q/ h% W$ X
to move-turtles
( ?6 \ H1 y2 r/ V! w: \ ask turtles [
8 B6 h8 j- F- }* L3 ^/ X+ D right random 360: c3 R# Q3 K; o+ S! M, i2 Q
forward 1: ~ E, P4 T3 \) F7 q2 o
set energy energy - 1
4 J$ C' ^3 N+ [! u ]
* z9 [8 Y4 \9 T. T( @end
! A* C8 E; o" X" G4 eto setup-patches
4 ?( G$ ]/ i, M% l) `% @! z1 u ask patches [ set pcolor green ]4 m; a0 l! H' D' ] t
end
: O t& K1 @0 J! N6 D$ kto setup-turtles* N" }! m/ N9 t. _/ @0 j/ L
create-turtles 100
% C/ v9 Q9 A! f) b g. M& Y- K$ _ ask turtles [ setxy random-xcor random-ycor ]
1 ^" P- |5 j+ r$ d. Eend. V/ A7 A, k' y. d3 y
to eat-grass
: u* [2 W9 E" c! i ask turtles [+ @1 u! j* `4 o) l+ X
if pcolor = green [
) g9 A) \- U% u* D set pcolor black; T& K; \9 Q9 n) P' z6 t
set energy (energy + 10)- I4 V# G( w% j4 A* a0 d$ @
]
& ]& u) h V) r% ?, A! x$ H ifelse show-energy?- h4 j; L) r7 X3 y W
[ set label energy ]
/ a+ J* Z) s C3 M2 L% E [ set label "" ]( X! Q/ c$ u! O, V2 o
]
# H% i& C# `) H3 P* uend3 y' M/ L* G' v1 t2 v
to reproduce
$ c( R, j4 R. ]0 o4 c6 c ask turtles [; ]# N/ `* ~. k; j
if energy > 50 [
) z4 w; g& l1 D7 c W o: o set energy energy - 50
" `/ U. i/ ^6 A7 \) P/ |7 { hatch 1 [ set energy 50 ]& p4 { U$ @; ]& T. K4 x
]
* t- k- B0 X( V, M! H8 k8 E( }& \# | ]7 K* O+ U+ M/ A
end
" {; D2 J. j3 t, P3 e: @to check-death
! j1 j: V/ m! G$ X ask turtles [
; v. W+ Y' Y. s% B. y8 i8 q if energy <= 0 [ die ]
0 u+ ~' ^% @3 T/ B& ` ]* f8 r4 L6 g) f
end
- Q' O: t* @# n9 sto regrow-grass9 y# E: q% U. u2 Y( z$ l
ask patches [
) C$ F8 v8 e1 g& }5 @ if random 100 < 3 [ set pcolor green ]
( H/ z" }" `2 {3 E) T5 p ]
9 O( g/ P+ M, D+ B, ^end
; k4 t# r" }1 x% [+ T1 v Lto do-plots2 O% Z& ]* @+ V* d$ _
set-current-plot "Totals"8 e' C% [5 R- l& n
set-current-plot-pen "turtles"
* T: A+ G2 P$ L# F9 k b plot count turtles
5 M2 c0 W4 e( C5 ?3 E o set-current-plot-pen "grass"
6 Y5 _) g7 U% ]2 q5 \ plot count patches with [pcolor = green]- p! Q! d& |5 O& z* G; X% k; C
end
/ w# {/ \! D( q) k3 b+ \2 Q$ p可是运行时提示no such plot: "Totals"
* ^; `" k9 T. {! }) O% ^error while observer running SET-CURRENT-PLOT/ m2 q S4 t% i3 P Y3 R0 m' E
called by procedure DO-PLOTS7 B2 [5 f9 [ m3 j: C
called by procedure SETUP
8 z6 p/ _! V6 Q called by 按钮 'setup'
$ W3 V1 s2 V- c% M5 J& {求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
