我编的程序如下turtles-own [energy]) E; \/ ]) M$ b m
to setup* m8 R2 J4 c% d2 G7 M- Y
clear-all' [" \, ?! n. n% J
setup-patches
$ G+ b5 H$ Y4 |% I create-turtles 100
, x! ?. V- r! ^. {9 a: C do-plots6 p. k2 W5 m$ o( O
ask turtles [ setxy random-xcor random-ycor ]) O; B. c2 R" ~) T l; W0 @/ H
end; B# z1 J: m. F1 Y7 w4 D6 `* U
to go
* i7 }& e8 K4 S9 y move-turtles c6 P* t* z" W4 c5 _; y0 C9 @
eat-grass; x0 S! D3 N1 ^2 c. `9 \' k
reproduce- B. h* X% P, ]$ C9 E
check-death" i6 s. \+ g+ K" S# s, J- ]7 q# a- \
regrow-grass, { L7 a( n" w1 s
do-plots% g U: R7 a/ c6 f8 u% h
end
|/ ]& D$ }/ g: E2 U: U6 m! Kto move-turtles
7 `6 f7 ]8 j, f* O3 E h2 } ask turtles [
8 v7 m' Y1 T3 m right random 3605 ^; I- W6 G: }0 u# D" o ^ x
forward 1( _/ R+ G' t/ x; B) i6 E5 M
set energy energy - 12 Z" J" W& o" Q* c
]
\$ O, p7 {; Pend6 O1 y: X2 f$ ~& f
to setup-patches
" o8 x$ k! o. v ask patches [ set pcolor green ]
. w% r- E) `- o9 j \3 J7 @+ Cend
, H5 Y4 a) C( V8 Xto setup-turtles$ j( |. O1 o2 B3 a/ q
create-turtles 100/ U- m- t. e+ a+ L, r
ask turtles [ setxy random-xcor random-ycor ]: Z" c4 K7 z- ^7 F7 E
end, s9 z) K" g7 d$ f
to eat-grass
( i) [* V% o! T& T/ E ask turtles [
+ k% |2 M/ v0 Q if pcolor = green [0 e% [2 k+ \8 z5 [3 Q# m, [
set pcolor black
( V& ~1 k. ]+ a) t# S3 q0 N set energy (energy + 10)
' a1 W/ G2 R4 A/ T ]
# t- g# n3 Y9 G% Q8 |! P5 V; s ifelse show-energy?
+ m% O0 \ g; @8 E [ set label energy ]: W9 f# j4 u6 S6 V) d. Z
[ set label "" ]3 G. x6 h) E& P2 b' R+ d9 |
]; O& s7 D6 W) b7 E0 w3 M3 P6 Y
end
% Q; o9 }# D0 Z4 O8 Dto reproduce
. `5 C' A$ \, o. H; ?5 r/ e- t ask turtles [' d; O& k; C+ F, g+ g
if energy > 50 [& [( \: c2 y- o/ P9 `( M- l
set energy energy - 50
# }0 A% J/ G& j% {5 l hatch 1 [ set energy 50 ]: q( }* W7 `# ~: o* M+ S- a, I
]
5 W- A+ e$ p( Z ]
8 Z9 e8 a. D1 _! |$ K3 Z* H, @3 ]end
3 |" n2 r7 m6 L, Ito check-death( T% Z; p5 N i" }: T
ask turtles [
+ I8 c( k- h# W if energy <= 0 [ die ]
. X7 ]' v9 K7 \* |& T) u2 M6 M ]8 G; a2 p. T1 c, g( d" H2 s
end P) n U) `6 S; }7 s+ E
to regrow-grass
" s6 [1 W. p8 P% a ask patches [
b4 |! s0 L( b: J: ? if random 100 < 3 [ set pcolor green ]# v5 L" ]3 i2 l7 B2 R% v
]
3 h7 U% C- ]+ x0 \2 V/ Nend
4 K$ T1 _+ H q7 b$ d" ] Eto do-plots
# Z2 \+ H* q2 y, N, y set-current-plot "Totals": v; f( H2 W w. b H
set-current-plot-pen "turtles"
6 ~. ]1 y, I9 K plot count turtles; H* E1 ~8 n) Z4 j
set-current-plot-pen "grass": p# L2 W/ C7 b) S$ R
plot count patches with [pcolor = green]$ H0 b9 I' D( k' K% _
end9 z' Q0 v3 J5 V" u! a9 Q
可是运行时提示no such plot: "Totals"
* s8 b4 ~. C, F+ g7 |% D) H- v" \% Lerror while observer running SET-CURRENT-PLOT& ]* d" ]. {- b1 o% q9 `( ]
called by procedure DO-PLOTS _" Z8 S' k/ P2 I
called by procedure SETUP v% `3 g; s: m4 h- {$ u1 U
called by 按钮 'setup'
5 `* N1 h2 V, W2 Y- R$ P, n$ E求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
