我编的程序如下turtles-own [energy]
& S1 ^) i: Y) c3 J. y; K, F% Qto setup
; u3 j% L0 K8 Y: k$ d9 j clear-all/ D; v& X7 V6 M% @* W5 _$ \& X
setup-patches
. G# ]% N# K3 ~% c create-turtles 100
X" Y5 g' I2 {$ t T5 ? do-plots7 z2 }, t3 m$ h1 j6 q0 ~; T( A
ask turtles [ setxy random-xcor random-ycor ]' {' x7 r3 a& @
end
3 P6 b2 {7 Y7 O9 o7 i8 Lto go
- L5 I2 |1 {- p8 @, X8 R; |7 X move-turtles
8 G" P" J$ n3 Y0 j2 G eat-grass; O/ T; H K) d# k6 z5 b& r
reproduce
# x; M" h, s% b, |# r: W check-death
9 \' F3 E& F6 Q ~ V) [ regrow-grass
" |5 {' x7 c( q3 h# L D do-plots
/ V1 b& |8 S( X8 V+ G' W4 Oend
( @3 }7 _2 ?) e5 n Mto move-turtles2 H' r( T8 C! F N% H2 U
ask turtles [ J! z9 K9 i. W9 Y7 O
right random 360
: j2 R2 u, b/ G: l) b5 U0 H$ C forward 1
8 r$ @) w( c. s; `3 b1 V set energy energy - 17 b1 U7 j9 X4 O4 s# Z) O
]
7 c5 F, |: h- K0 N' fend
# L8 _+ m0 h* @# H6 J, Ito setup-patches
) l: s% k4 S* S) f ask patches [ set pcolor green ]4 R" K, J- e$ }$ M5 P0 s# D ~
end
4 G, r) Y1 r4 s" E$ E# M4 Ato setup-turtles
3 [+ b4 T0 n( o) z# t create-turtles 100; Z* A8 \8 H, \) F6 E
ask turtles [ setxy random-xcor random-ycor ]* p: }! g" r# Q, ^: Z7 F' T
end; t, i2 S. ^5 t) w) G$ _
to eat-grass
. _* v5 @* S# p+ W3 a ask turtles [
0 ]" Y; i' D# ?0 i8 J if pcolor = green [8 c0 U# X9 \& L! [ v/ H$ K6 X- a
set pcolor black
) K% m# d+ \/ q5 x | set energy (energy + 10)) A# t3 |/ L' u0 @$ }/ {: I
]
7 V; f: V$ L9 t t5 E1 e. Z# R ifelse show-energy?
7 l: d5 w. |2 } w# h [ set label energy ]* I" Y# p3 ^$ l
[ set label "" ]
) z7 c( n4 g" }( y2 a, m3 u ]
7 V9 a9 V/ `4 b" l: tend& u$ x0 n3 {, N8 Q
to reproduce. {4 B, U$ k" v! n! m
ask turtles [
. ], Q. ^: E1 T) |, w if energy > 50 [
1 L2 ^1 v% ~. O! H' _1 P set energy energy - 500 F8 C- d2 O* _2 U' E! b1 V" e
hatch 1 [ set energy 50 ]
) Y. ^3 P B5 ^, k1 E ]5 G* S6 P' t) {
]) f X# K: \: [
end, V$ T3 ^7 n' d+ d t% K
to check-death
( E5 j2 ?+ j2 T) v8 O6 K+ b1 X, g ask turtles [4 d, _" ]6 t8 Q! h6 M- k% R ~
if energy <= 0 [ die ]
0 ?. j4 x! o1 |& W R ]
7 { r/ E8 m, i5 n& k2 m) {end
3 ]! y1 T- r, o: J _to regrow-grass; U6 c; L" C G& P% W, p" [4 A' L1 n
ask patches [
6 d3 U1 D) h0 W if random 100 < 3 [ set pcolor green ]3 z/ @" ?5 D, T. s: y9 T
]
8 \7 l* L$ ^' a3 h2 @5 Pend
- @- E6 Q% z) T# X6 B2 h: A9 `# Hto do-plots+ M/ Q9 _8 ~0 b: f O# f
set-current-plot "Totals") G i- J+ E+ q1 L( U: m
set-current-plot-pen "turtles"
" J3 O: e( J9 s, V) V plot count turtles
) Z" p0 S0 f4 ^* l2 K1 T set-current-plot-pen "grass"
, D- Y5 q+ m W6 { y plot count patches with [pcolor = green]
; J: Z6 ^2 r7 Hend/ R1 o" U3 Z' h s, B- d: h+ G
可是运行时提示no such plot: "Totals"
* V: x$ Z% c. m0 b1 k# N3 v0 n1 f+ Werror while observer running SET-CURRENT-PLOT9 @# p" R& f8 I! e
called by procedure DO-PLOTS
O7 w; ~# g3 |$ {- n6 @1 Y+ ? called by procedure SETUP0 t! C4 V! g( ?) L; b6 v/ ]
called by 按钮 'setup'
3 E: p G& e2 N' ^; F! v求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
