我编的程序如下turtles-own [energy]" e, `9 t u+ j7 t' t. x- o& e- G
to setup
, E7 A# f6 X3 A0 ~ clear-all6 w6 N }" G2 M4 g6 e
setup-patches. O C1 g- B5 e( [- `: L
create-turtles 100
3 C8 Q7 S# J; z, Z* w! ^6 F: l do-plots
' N% D4 u9 ]4 l) V5 _7 h# A& F" } ask turtles [ setxy random-xcor random-ycor ]
3 H3 {! X. q2 c8 x+ m9 k6 Lend0 E- A# u: r4 l% z Z
to go
* Q, z' N F, |% o& V7 j4 M% Y move-turtles
+ @) ^# I8 R. o6 s# a; S eat-grass! J* T+ G5 h! g* P
reproduce; E% y+ |; w) X* l0 M
check-death6 B2 I' ^1 x+ v
regrow-grass
O+ a- N0 D9 s( a: ]# m9 C& s do-plots
1 t5 v% Q! L; A6 }7 W3 }) ?( ^end
% A4 _+ R7 U* l6 a' Qto move-turtles
% T8 K# q Q+ {) ?1 U, E$ p' |# s ask turtles [* T9 e# `# o A3 W; _) F3 c& g+ z* F
right random 360
" a) |" S1 W- n2 H forward 1
% x, t) q0 R0 G6 f' j8 A. q8 o! b set energy energy - 1
/ q' t6 |4 m* D$ h8 k r! ] ]' m3 T& S" J# W
end0 g# {( y8 K9 `2 a3 @& C
to setup-patches
. v6 G' Z0 b' k7 n ask patches [ set pcolor green ]# R, c' |) J5 C. t$ S4 p
end
* O9 o( e! T$ C$ d9 g, eto setup-turtles6 Y9 E+ F2 C7 j. p d7 z- F! c3 I
create-turtles 100! ~3 }1 M9 g/ L- [. }% c+ A6 v1 D
ask turtles [ setxy random-xcor random-ycor ]( |( H: X$ d/ _( N2 q
end' G4 `" e6 t! H, m. \0 s0 }
to eat-grass
% [, m8 Y A# b8 C" U1 z& M+ a ask turtles [
% B, p" a8 j/ E4 F8 x7 h" c if pcolor = green [
2 s: A( r$ ~8 |1 G1 f1 S1 m set pcolor black
4 x2 p* _6 j' ]4 q5 } \* J# Q set energy (energy + 10)! i$ V, n! K1 v" c2 Q6 G
]5 U# D, O# e5 r$ n
ifelse show-energy?/ P) ~% c+ \! v
[ set label energy ]. E! c& { X1 T5 P
[ set label "" ]
. y `: ~, z6 X) W- n: l ]
- t( H% J3 a' ]& p/ Y3 {5 uend
8 d3 }, M. ~, d" oto reproduce
( u# ` X- s; f9 F6 I ask turtles [0 w. s& Z; y1 I/ _! m; [. H% j! U
if energy > 50 [, M6 J0 o3 ~% e2 x
set energy energy - 50
( v, ^. v- L; M& S. M& L hatch 1 [ set energy 50 ]/ {/ j' a* u( ^! j
]2 K% W% [: V. j! [
]
: I( |) r6 S$ ?& q2 z& p0 \8 \; _1 xend
( v/ }6 ^( p. B) \4 w& N: b* ito check-death
* b" f+ e+ C1 ^* t3 J$ M5 t0 Z ask turtles [
% P+ t5 ~) L0 W4 d- C1 C if energy <= 0 [ die ]
, |/ t" a2 Z* t6 b ]3 @; X1 G& k- U; V. t. k
end4 x. |" b. R( l O
to regrow-grass
0 |* A) b2 s' Z) E ask patches [" ]6 M; v. t. z
if random 100 < 3 [ set pcolor green ]2 d7 h! Y/ x& J u% h" k) W) Q
], A0 \) A. H* m2 i$ [& @
end+ O7 {6 N) p. Q7 P% s
to do-plots
3 r4 \" V F% f; s set-current-plot "Totals"! _& P4 i9 o2 a: |; Z
set-current-plot-pen "turtles"" P M8 n" F! i' f u6 i: w6 r
plot count turtles
4 Q' o+ ?8 }; ]6 R1 B& }8 U w set-current-plot-pen "grass"
+ s# ~1 k" g& m t plot count patches with [pcolor = green]
) o9 p5 m" G) d% Mend
( M5 `7 x! T& v$ N: L/ b' D4 Y) f可是运行时提示no such plot: "Totals"# u6 }* J9 n' {8 d
error while observer running SET-CURRENT-PLOT) x5 `* a& y9 E5 `6 @6 m
called by procedure DO-PLOTS) W: }' E' @, }# l4 z' Z
called by procedure SETUP9 ^( {. ^ p, a$ `- w k1 X
called by 按钮 'setup'& x1 o+ d" i3 h0 v6 M( l: Y9 R
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
