我编的程序如下turtles-own [energy]
. R { i* P0 ]: \6 ?3 X4 }& eto setup$ n2 |. D' p. B
clear-all
9 i5 D% J( x% O6 M+ B* } setup-patches. ~1 N9 V- ?, U* S' G7 u% J
create-turtles 100
4 D' m2 |0 Q# J# Y/ g7 N do-plots
! x: ?% r) q1 G0 g ask turtles [ setxy random-xcor random-ycor ]
: q7 l- @ V" k: H m6 v; u) Q% X9 lend2 _! F9 u4 H4 Q- ~1 f' @' ]
to go1 G5 j# e$ r! k5 l9 S) E& h& R$ s) D
move-turtles
4 i, G$ w, K1 B/ G0 Y2 q+ B, {2 V eat-grass7 D5 R: y! l: d# [" t9 ^2 i
reproduce
. z% j) u1 M3 t8 q check-death7 G. c5 k/ x7 ?
regrow-grass
$ H" l: K4 Y* F, i5 A8 G, [; k' V do-plots
6 `! W- U/ q+ _; V; C0 L- Uend
& P' T4 B6 b4 ?# o# H9 _8 lto move-turtles
! y$ V" Z' O4 u$ p6 D' z ask turtles [
x) _1 l7 s% H4 O right random 360
; n" S8 n# o2 c- r4 H forward 1
Q% R, q% ^' l3 k1 n( m( t: J set energy energy - 12 E6 U* b6 e, `
]
6 `/ l+ o ^4 Q0 h2 h6 rend
8 n2 h7 V" d' Q- C8 F i) i0 {to setup-patches
) {6 V4 N( W! T0 o! C ask patches [ set pcolor green ]
& k: K6 q3 y9 tend! k: ?* h/ k3 [8 c4 Q
to setup-turtles, M I Z5 x* U- ^8 e$ C
create-turtles 100
4 D- }' f& ^4 V4 w ask turtles [ setxy random-xcor random-ycor ]
) F1 X* B) j/ z1 C8 b6 I7 M2 Gend
% ~) D7 |& J! Z- F; vto eat-grass
/ W4 W3 M+ }) R5 e$ D+ A3 @( u: l7 O ask turtles [, W+ n/ u- r4 c. H" w
if pcolor = green [. F) {) \1 P2 U* ~9 W/ _
set pcolor black
3 m! s" N2 e% \! q set energy (energy + 10)" U- l# }6 T; W6 F# [
]
# X6 J F! M- ]- H, V9 d/ n ifelse show-energy?9 u( o/ a/ v0 N) ^6 T
[ set label energy ]* l0 s1 T# Z% R `- h* j* r
[ set label "" ]
% W; y+ s& v6 j. r: M% d2 r ]
) z' \+ k: K% v- t9 \end1 u5 _/ O1 B7 Z" u6 @
to reproduce4 a' h: M8 _2 c- u6 i
ask turtles [# d/ p4 c9 ~' _* V9 ~. ?: V& \7 k
if energy > 50 [* o2 v5 U$ ]) U2 H- r" u! c) O1 i
set energy energy - 502 n [+ D# M- H9 r+ p
hatch 1 [ set energy 50 ]
' `" R* n( {- n1 N& J ]
, r3 r2 x8 x% C# k' K ]
: ~3 Q! T6 E: k F6 Y# Q6 w1 lend) [- L. z; ^/ j% M0 [
to check-death
7 U$ {. s" V$ o0 \, k% {) j ask turtles [6 w* J1 R; A! j& T
if energy <= 0 [ die ]! F0 B+ N( [5 j
]+ a" ?. D5 s$ M/ m3 @
end- \9 t# j5 ~9 g; a# H
to regrow-grass1 Y& }9 l8 |: R* H) z" F
ask patches [
: u# {2 L [) Z, ? Z8 L, ^ if random 100 < 3 [ set pcolor green ]" n! J/ I" s/ N; I! ], t
]
! V# H- p" {" t6 qend
" @3 n0 H: x% v C) Lto do-plots
$ Q& ~8 d2 `; `1 C/ k set-current-plot "Totals"; c1 `. {) \$ l: }- k
set-current-plot-pen "turtles"8 z z: u$ ?: h2 \2 l& s
plot count turtles
8 Z) ^7 i: L7 u1 }& K& o* N set-current-plot-pen "grass"/ `7 p' h" M3 e- N/ x$ ?! |
plot count patches with [pcolor = green]
2 z0 `# ~5 X5 D0 zend+ r- y9 [8 b3 U% ?1 _/ b
可是运行时提示no such plot: "Totals"
6 Y! E% b* |/ d$ y6 B' q4 herror while observer running SET-CURRENT-PLOT' b5 y/ ]+ I0 r- r/ y
called by procedure DO-PLOTS
% n" a; j. s _$ W called by procedure SETUP' v$ A1 Q) @0 o. }! c: _6 ]
called by 按钮 'setup'/ n, g5 R' L. ~
求大神解答啊 |