我编的程序如下turtles-own [energy]
+ \; g% s' ]4 ?7 v3 l" kto setup: o& I. N4 }" d! B
clear-all) e: i3 \) r% n5 {
setup-patches
$ A. n3 Z( l- q2 n- } create-turtles 100
! _4 ]0 P: w& x V do-plots
- B' H4 r8 q: d3 K, s ask turtles [ setxy random-xcor random-ycor ]
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to go" F7 V6 T2 o7 D( M# m& L1 y% g
move-turtles
* W* C* O: f9 `& ?+ N$ } eat-grass/ k' u' y9 x1 u: |; P4 z
reproduce
. m7 F4 b1 ~8 L8 P& O5 \6 u5 N check-death9 n7 N, d4 f: z
regrow-grass
1 O2 g7 r9 V# D: y) a do-plots1 `6 E# c+ x( S) c7 y9 ?
end
! q6 o6 r1 J( M; }2 A2 sto move-turtles% ^7 |0 \% W7 s! j
ask turtles [
/ Z6 _+ r6 Q8 w$ m right random 360
5 |: ?4 e1 f- \8 x4 w# O; _/ z forward 10 h ~8 P7 E' E- h. x
set energy energy - 17 j' \5 j# C- Z0 k U
]; ^0 @' \- j8 a' K5 @6 P
end
" C0 s) x; G; u$ {. Lto setup-patches$ |# H% F( `1 y& `
ask patches [ set pcolor green ]) I9 d9 i0 ^9 Y1 M3 O2 o( k
end
w6 v2 {9 h- L! f- {+ [1 zto setup-turtles' Z# Z% C5 M7 m' G. G8 T g
create-turtles 100" N5 f4 M$ p6 W6 x' q
ask turtles [ setxy random-xcor random-ycor ]
5 Y& E% E1 q& p9 R* Y5 Oend
0 T, v! [# d& w/ o2 N9 R; wto eat-grass; F9 G6 J2 H k
ask turtles [
3 [3 Z: w W6 k W if pcolor = green [
2 J; w' R$ k1 h2 T4 O. W) Z& j: Y set pcolor black
# s. N8 p' |% L* b1 X7 G7 c set energy (energy + 10)5 _1 j0 A) E# J7 \$ P- W
]
9 F, ~- r* [3 U; [% P# O" q ifelse show-energy?
+ V) g$ B9 Y1 y9 j' n [ set label energy ]
' ~9 W* d+ m5 g/ k9 y [ set label "" ]2 j3 `: {& R' a3 u; ^0 j
]
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to reproduce
" i/ I& e) h L' u! D ask turtles [
! N8 Y4 v( x* P# Y4 x if energy > 50 [
* o3 {/ S6 i' F% o1 z$ d set energy energy - 50
* A2 k3 @8 \: e! n: o' k- ] hatch 1 [ set energy 50 ]+ | B1 j" J1 ^5 {
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]" u; E+ M. q$ T% h
end+ i: j! S; E. E7 R
to check-death: f3 y6 c' z N4 |7 ^4 l
ask turtles [ Q2 W! O# g% ^+ r% h9 U' @7 U
if energy <= 0 [ die ]% f/ n! z M. A+ A
]
# H% K- I" S+ Cend
7 r% q0 u% L2 z/ l }, |/ F) sto regrow-grass! I5 i3 i! J0 \- M. [+ ^1 d
ask patches [
+ `7 i& o/ V# G/ q' t if random 100 < 3 [ set pcolor green ]7 d5 c r6 n7 v8 L: `; F B/ J
]5 s4 U% j. V2 J) }& f' o. {
end9 P9 j! V7 D. |) k! a. ^
to do-plots6 a+ _0 ?8 k9 q. V# \4 w1 T
set-current-plot "Totals"
' h9 e3 E) ^% C+ e0 J1 N set-current-plot-pen "turtles"
, C) ]8 S& Q' v* @. O# t plot count turtles
: p, N/ m8 p0 z& l8 P1 h set-current-plot-pen "grass"- z/ Q" k( {3 @$ z0 B
plot count patches with [pcolor = green]5 V" N% s3 i' z4 q2 G$ J3 p3 J7 o/ ^
end
- w, ^$ K3 D' L" Z/ _8 I可是运行时提示no such plot: "Totals"
3 j- O3 i4 q2 i: [error while observer running SET-CURRENT-PLOT
# t! i1 x5 _* ^# l% |6 c called by procedure DO-PLOTS/ L2 L; S! b3 I: S4 M) Y3 M2 g
called by procedure SETUP( ]- q. t L# g$ K9 K! ?
called by 按钮 'setup'+ d# Z$ C' n6 l1 h8 c! @+ O
求大神解答啊 |