我编的程序如下turtles-own [energy]
; ?$ c- r5 G0 j. _to setup
1 U- V. |8 g. J8 i clear-all) z1 Y* p# `+ o% o0 y
setup-patches
2 E/ m# v9 V6 `2 g0 F8 T! ]8 Y create-turtles 100# M9 j) L- [5 _' w% `
do-plots
( ~$ I1 H3 P3 j8 q ask turtles [ setxy random-xcor random-ycor ]; t' t; b% |$ D5 u4 ?
end
) g( X! F! o& X. G: Q: mto go
' _$ D4 t: V' B. f! F" a move-turtles$ f* f( E1 i3 s
eat-grass
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check-death4 J2 I' C7 K; J/ e9 S9 d$ q+ }" @9 |; {
regrow-grass
: y% v$ y! E; I) u1 d do-plots
& P0 Y1 ^! I2 q8 eend
{+ e3 L; `- o8 B$ @+ n, T7 ito move-turtles
+ ^& M0 v! H- i, s$ }" m ask turtles [/ Q! j" g& q. S5 m% ^* K
right random 3601 F& a) n6 @8 v% i
forward 1* l4 w8 p+ \. I+ p
set energy energy - 10 H, W, I, _2 n( J
]
; `7 D: K9 C2 b$ C, Eend
; A' a4 }0 ^, X5 Kto setup-patches" u0 `# u1 \. k
ask patches [ set pcolor green ]( c6 S7 e, p3 e9 P4 T- ^# S& k
end& ] |6 S: s" \! @
to setup-turtles5 l+ X# u& J# k2 Z
create-turtles 1001 o, H6 f9 j }+ \& u6 W! a( u6 c
ask turtles [ setxy random-xcor random-ycor ]$ x3 G5 j. i% d/ X% \) k
end
" p% l/ S5 n5 m9 C0 V, ^to eat-grass% ~7 f* h2 E* z6 D
ask turtles [
. M+ l% Q; a+ Q! |0 i% n l3 T if pcolor = green [+ \5 J, \5 V$ h( }7 L
set pcolor black
, _$ P2 F$ I# I set energy (energy + 10)9 n' X. e7 t6 p- w+ ]: Y
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ifelse show-energy?& M+ I% v: U2 s
[ set label energy ]( { i1 |" U6 ]6 b' ?
[ set label "" ]
$ P: j4 A+ s: q ]
2 d3 {8 y( G; {9 oend/ P/ K' L8 L$ W" C- u
to reproduce
5 h, U2 s% ]* ^8 n7 r2 l ask turtles [7 s2 c v& z- G! D. z
if energy > 50 [8 b1 b% y( t2 s$ `. [
set energy energy - 50) z) X( l; o8 F( ^4 u
hatch 1 [ set energy 50 ] @; v7 ^7 z- d- a
]2 e$ h6 n# o7 J2 P, `
]
/ G1 n; _" u+ U7 uend
6 M0 C) J5 m- f! d, k3 \! v; {! Jto check-death |+ N: ~" }8 y4 B! R& Z7 P
ask turtles [
$ ~, q. D: m7 D- c5 @ if energy <= 0 [ die ]* q) R( \5 O* p6 Y! B8 a# D! K
]
/ v* k+ K! {7 z! b# c, Xend0 X. a5 T, q3 f8 q9 s) }; j" S
to regrow-grass
6 ~" W6 n# L; u# J# F: x; p! ` ask patches [, S3 ]6 n2 [" F. B7 K
if random 100 < 3 [ set pcolor green ]
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end0 J* H" A* @) b0 R0 m- W
to do-plots. m5 C% \" d# h( N( M! Z3 F C
set-current-plot "Totals"9 a, ]2 S- c8 L& z8 d1 n
set-current-plot-pen "turtles"" c9 \1 A2 Z/ f) m0 t% F
plot count turtles8 p, }0 q+ z0 n n" a) _
set-current-plot-pen "grass"
( l! k6 Z0 \1 i7 u( Y$ x9 i plot count patches with [pcolor = green], V8 f$ j/ g# N" c6 D
end3 Q2 N, j' ?( j R4 ^# z
可是运行时提示no such plot: "Totals"
7 B7 ]3 v5 e! i6 X3 F: Berror while observer running SET-CURRENT-PLOT8 [% f. Z! A5 L" j
called by procedure DO-PLOTS
8 {' B: {3 N0 [% h+ v called by procedure SETUP. S% x: y( O' M( q* D2 n
called by 按钮 'setup'6 a! L1 V% i, m3 R2 P/ m7 d
求大神解答啊 |