我编的程序如下turtles-own [energy]7 E0 `+ Y1 `' s, M2 [$ e
to setup4 h/ Q# M# _7 @# c- }3 Q
clear-all
2 ]. F) [, d+ H6 D' t* ~: } setup-patches! X8 a% {6 _ M2 s+ r
create-turtles 1001 W/ T; B U3 A; e ]2 x
do-plots) O$ P, @( \4 _5 m! P1 ?) ]
ask turtles [ setxy random-xcor random-ycor ]/ u! N7 l2 F q
end$ b% D8 V Q/ ` ~9 S
to go) P3 V1 e1 ?% J
move-turtles7 P" O& t% [( \' q, k& \- S
eat-grass2 m+ `# T9 k4 h y9 ?& B
reproduce
% M9 }4 a% b; j9 E, N" U4 G- [ check-death
1 K$ x. l, r( Q0 h. j1 P regrow-grass
8 t0 L" O* g; e" N do-plots4 C( A% }9 ~: p; t# t) Y6 b
end2 Z$ Y! \9 ?. Z- y% l$ t
to move-turtles
, S+ e' _0 Z# V( O ask turtles [
/ v, X7 Y8 K3 d) c+ \0 ` right random 360
8 x" T- w/ Y& t forward 1
- E% P; h+ I9 l! d# { set energy energy - 1
3 p! @2 `- n/ q6 o1 n ]+ d( `6 n( R8 D2 J" Q ?
end
) r6 I; R8 n; r, X0 N3 nto setup-patches
* G, _9 Y, `' ]0 O+ N/ Z) _ ask patches [ set pcolor green ]
) u% ]! Q9 G* B1 e: k4 k0 Send
4 a) Y- e/ g Z" ~( o/ Dto setup-turtles
: Y) ?' I3 r/ B+ H' j) L0 i create-turtles 100
$ d7 E# D' ]) }$ [( Z# t' Y ask turtles [ setxy random-xcor random-ycor ]! T+ v L% }9 v& \5 n3 M! i& C
end
, w% E7 ^: Z, h1 V! n6 I- s- cto eat-grass
9 U+ i2 k! W6 v* x ask turtles [
4 o" [+ s$ t0 u( y7 [! \8 u if pcolor = green [: L* V$ `8 K* p
set pcolor black
8 a j1 B- y9 t" q; T set energy (energy + 10)
! G3 ^2 E7 l0 R- p ]
% u) y) j" e$ Y, U2 ` ifelse show-energy?9 w" s2 c9 Q; \# N8 M: F
[ set label energy ]
$ a; ?1 P6 \5 U8 ^6 D% z: f [ set label "" ]
: u7 `- i, Y# E3 T8 ^7 g7 O# ~ ]1 x; p/ C9 u: y
end
# [) e' o" f3 t! o0 f3 G2 Yto reproduce% I) ~8 @7 `# E3 o) S
ask turtles [# ?' N `4 T8 h# R M& ]
if energy > 50 [
3 ^. i! b3 p! ?2 {, R# V0 U& Y set energy energy - 50
: C3 r0 r8 D3 s hatch 1 [ set energy 50 ]
- {5 o7 w& m* M7 {8 s" c ]
2 W' I4 X, q: D- r& F ]
# M3 |9 O6 b3 w4 H: y5 E2 aend
7 n. ]1 E0 _3 H- E# ^& }to check-death* m0 X& W! v7 z6 E5 i5 {' P
ask turtles [
1 L" b) ?2 X- g( H if energy <= 0 [ die ]' @0 X& S1 Y1 ?2 }) R3 K4 D0 _5 `
]
1 z, C1 l3 m5 o [ n/ ?1 Yend
- y7 y/ N& M6 G! `8 w" p% n5 T- fto regrow-grass
3 _& F: B1 ^; s6 ?1 V' g. K ask patches [
& M( O% o+ I. e. | if random 100 < 3 [ set pcolor green ]
6 T5 z$ g u/ n: O/ k5 z- R( V ]( A2 A# \0 H" D+ y# y/ {5 }
end
' i5 I- T& [. D" Sto do-plots" b- e% u, X: v9 l$ g8 Q. G) t
set-current-plot "Totals"5 O" e$ o$ ~8 \/ {: ^: d8 |" ^1 K
set-current-plot-pen "turtles"
* F/ Q7 v. r, [/ G" b plot count turtles
7 ]# A. j1 ]4 G# A$ e& {7 w set-current-plot-pen "grass"' B) F$ D: R! C+ b' F$ i! V
plot count patches with [pcolor = green]( x! H6 z' t4 b; v# h
end
* V8 V' E( p8 ?% d; A- Q% {) V可是运行时提示no such plot: "Totals"
. G" E# Q, k: perror while observer running SET-CURRENT-PLOT! q2 z* M0 k( z1 ~
called by procedure DO-PLOTS' S- }4 O3 F5 f# c7 s
called by procedure SETUP
1 m4 y* g1 s8 F$ N6 v, s& | called by 按钮 'setup'
# H! U5 v5 t4 S+ [! ?2 o4 |求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
