我编的程序如下turtles-own [energy]
8 F9 q- @9 ~7 k! eto setup
! l3 ]& D: d. R y5 f3 Y clear-all
! D# a2 W$ D0 ^+ i$ R setup-patches7 u& X: F9 | B4 P+ b- u+ R9 p
create-turtles 1001 g, T1 Q* j2 l" i1 p
do-plots* l- C* B4 y! u @. \
ask turtles [ setxy random-xcor random-ycor ]
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to go1 B7 e3 z( {- @ u
move-turtles9 u! r* u& F) U3 m
eat-grass8 O8 P- T# Q* w1 Y3 [, n" C5 y$ ^; h7 |
reproduce
- F& L4 @6 M$ e. O9 L' [ check-death
4 t6 D( {( x& s+ o# D regrow-grass
# O# G% D% G( c" p do-plots
+ L2 m2 ?2 p' V. r2 kend4 Z- Z! s- V2 L/ _; t
to move-turtles
3 U# v( O: }( |1 A) I1 M ask turtles [
# h5 L5 o/ a0 u5 j$ f right random 360% B F- M& t; w- {
forward 18 l, h# {1 S; O- j5 B
set energy energy - 1
. r. b5 s# E" {# e5 E ]
6 q. u5 b: d' x( T" t& k8 mend% V1 w$ O6 m6 c
to setup-patches
# J5 f2 T4 @$ k" o ask patches [ set pcolor green ]+ x- g k: w6 F) z: M1 F
end1 @. q& w. x" `$ R- A' \
to setup-turtles
) e% y; \2 E6 B2 X create-turtles 100
8 V3 B, x2 O% ^' z! i4 x% y2 e4 a/ ?" C ask turtles [ setxy random-xcor random-ycor ]/ u; j! f. Q, e8 U: D% ]. E
end
) t1 u! a5 t/ q! oto eat-grass
2 x! Q; T6 H9 ? s0 f/ `& c! ? ask turtles [
: v0 P' V1 Q+ x if pcolor = green [' t- J4 h* j; J0 l+ [' g# [* r
set pcolor black1 x+ O) ~% {8 G% a# @# P/ L
set energy (energy + 10)
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0 z: h% X# m' s3 _+ T; @/ c: [ ifelse show-energy?
. Y* T7 D# f' `/ A9 f [ set label energy ]& e+ l9 M5 _/ A6 ?! c/ }3 H8 s6 _
[ set label "" ]. Z9 X& }; l! ?
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end
! {$ i( p$ u$ s8 c+ \to reproduce
) ]; U0 e: K X5 b3 } p e! c+ o ask turtles [
0 h* g) T' F9 R if energy > 50 [
! F; I0 I5 _/ c- @) n% j set energy energy - 50! A5 u F1 I) z4 Y( l) |1 R, z
hatch 1 [ set energy 50 ]
; E7 Y. U. K: w6 J ]
2 R+ {0 T, Q4 A9 I' Y; Q3 X! j! `! E ]
3 \6 q; L0 j; Rend
+ ~7 m' E% b3 n7 F3 `- k# b ^* oto check-death5 [0 {% h( H. t8 z3 U+ S
ask turtles [: a( o7 S. L7 N+ g1 M6 P" L
if energy <= 0 [ die ]/ e# K4 G, j. w1 b
]
. L/ X1 B+ c- k$ i. Wend
1 S5 y. J$ n3 {: \6 ^ e- S" u, S& Ato regrow-grass- G: c* K, N' Z( u; Q; j8 q
ask patches [
+ K8 R) J" S; t1 f2 N: D" Q if random 100 < 3 [ set pcolor green ]( I" T! S% u3 h
]2 R# M4 ~" S$ i/ F; V5 v
end
2 H& k8 f! K7 M+ P& Bto do-plots
" X) _1 d) O# F: |% S set-current-plot "Totals"' t& ]5 v$ g9 G* \1 E
set-current-plot-pen "turtles"4 b, m( W# H; G% c2 C
plot count turtles
' F! C& F, f7 y4 j, h+ w set-current-plot-pen "grass"
2 r- L! U: P' ^$ E9 ` plot count patches with [pcolor = green]
1 o, M, Q& B7 E+ u8 g8 o8 ~end
1 \% P5 |6 Z) @# k可是运行时提示no such plot: "Totals"
( t5 m" m0 t! @$ M# @/ x! @error while observer running SET-CURRENT-PLOT2 e* M; _( v- J+ F/ a
called by procedure DO-PLOTS) j7 m+ H/ N% _% z% F+ @
called by procedure SETUP6 Q( H4 _$ e9 [: h. {5 ^
called by 按钮 'setup'
9 _' a& F9 A8 e3 P/ W求大神解答啊 |