我编的程序如下turtles-own [energy]; ?8 X1 z! z, O2 S
to setup9 T& ?$ x* m, g
clear-all1 f# x- e0 X! Y* }, P
setup-patches, z) S7 B" s0 k2 Q( D8 {) B
create-turtles 100) E1 B+ I f/ M/ O8 V
do-plots
' G X( L' W' ?5 d' | ask turtles [ setxy random-xcor random-ycor ]
) g0 }) {, X9 ?+ mend9 ]9 y& v. ]/ q W0 Y3 }. @
to go
9 ~2 i. Z3 q, _- S/ x/ ?' X move-turtles
- R7 t9 y2 E; U' c. R |+ s' R eat-grass
- ?- \: n5 _# C2 R- H reproduce3 G4 u% w8 f" j4 M( U
check-death5 p2 `( j7 R1 ?3 s8 V: H; s( B* r, ~
regrow-grass
/ \( Q: E7 t. m) [1 n0 t do-plots% S0 b/ P' f" M0 W: E& e
end
5 @% f! Y. D" O) h( s* uto move-turtles& B( x4 S) F: l- W1 ?
ask turtles [
$ f2 J6 ?! m: J. j' I) R right random 360- x! c* c0 b! k1 r
forward 1$ L/ u( G, O; n' Z
set energy energy - 1; o7 N I- R& e! _+ h6 ~
]
4 r9 I! \9 @3 q7 eend3 K. o1 @: J" C7 n0 U( ^ |2 I
to setup-patches7 z4 o* {5 J1 s- R# b6 l- V
ask patches [ set pcolor green ]; C+ R$ f1 g [# z3 ?+ `& A" _
end
7 C0 r6 O$ x* I+ M& \to setup-turtles
0 |% V2 _) R# x! J7 k$ }. O create-turtles 100
( S+ f9 ?7 A7 a& ^. c0 A ask turtles [ setxy random-xcor random-ycor ]
7 Y1 q7 n9 R& X- dend
8 m) z, J7 ` t @5 A' Ato eat-grass
& h' _. ?; u. x0 S ask turtles [
+ \5 t- Q: Q) F4 { if pcolor = green [
6 | [0 _0 m0 i! ?; |9 V* I set pcolor black7 v) C& O/ c7 a7 ~1 h
set energy (energy + 10); M# ^8 d7 t1 O p0 e
]/ b$ H$ R) v0 K7 K! M5 R
ifelse show-energy?
+ ]* ]& q, Y& D8 ?, J [ set label energy ]6 v1 J7 {. H; L) j
[ set label "" ]
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end
+ |$ u( {4 J- y% H! N1 _to reproduce
5 g O% a' a6 ^2 ^! c5 X3 O! I ask turtles [+ o& G( `1 ?" }5 K
if energy > 50 [9 v9 K1 n# e/ F8 H7 y& y7 [* c
set energy energy - 50
) g) ]- L: w- m7 w& Y$ F hatch 1 [ set energy 50 ]
& {- p# `/ G9 P4 Z& P$ r ]
4 Y! @# M4 z' y ]) |, `( w+ L$ A8 V A, D6 y5 @0 X
end+ [1 X7 \/ m5 f
to check-death
4 N- A: N7 y+ }, I ask turtles [. {* ]0 [' S# Q$ @ I# U( Z1 q! T% M6 r
if energy <= 0 [ die ]5 o$ k% c) [) L4 V( D3 D5 i
]% }; t# w; ~( \ R' Z X
end
6 C$ P9 c, Y5 ~to regrow-grass5 |9 ?* o9 Z Q6 k) J- m a
ask patches [
+ V, e* |! l. ] if random 100 < 3 [ set pcolor green ]
2 T# L5 f9 r% N& \. v7 r ]7 g D5 C( y' g, w5 f8 j, ^
end
- k( \# ?, _0 b$ c* D3 zto do-plots) [/ u8 `9 C j3 E
set-current-plot "Totals"
1 t# {: I% l1 m8 v" T! G/ k set-current-plot-pen "turtles"
/ u6 ~7 w, I6 p plot count turtles& d' e: A2 o- H# o& ?* C9 D! t
set-current-plot-pen "grass"+ R$ \. ^! z8 H; G
plot count patches with [pcolor = green]
4 }& G3 G/ l( i1 x% Eend
! W7 l1 ]3 F: v, \5 {+ X可是运行时提示no such plot: "Totals"
1 {! j& W/ }8 R _8 l/ Eerror while observer running SET-CURRENT-PLOT
) h# K+ S; ?0 p% v8 p9 ? called by procedure DO-PLOTS/ ]$ V1 J& l; u, V
called by procedure SETUP& N, u6 Y7 Q+ \9 ?; f# Y) i
called by 按钮 'setup'
6 c+ ]( `0 F$ s4 `% U* i求大神解答啊 |