我编的程序如下turtles-own [energy]
% l W) w1 r6 m ?; D4 L6 Kto setup! @4 v# v' @/ d* A/ _
clear-all
5 F& ]* A7 e+ @ f0 D, s' m setup-patches& j1 M" Z; B/ h8 E& U
create-turtles 100
: ?# K: B. r0 ]7 E0 p+ v do-plots
8 S) j$ @/ @! k. p0 [ ask turtles [ setxy random-xcor random-ycor ]
7 C0 s5 }3 z* \4 k, Yend
. Y0 r" ^' E% uto go8 ?/ r0 N# o8 i4 j
move-turtles9 L7 a" u% m" |" N$ Q; d
eat-grass9 S4 }# F) \$ ?0 t5 _
reproduce
8 @& k3 e6 b8 s9 p6 h check-death
5 e0 b9 ^- Y* l$ c9 _& o+ R* k. { regrow-grass9 |; r7 n% q0 g3 w( J& T4 G
do-plots7 S5 B/ q7 _% {: X
end/ S! m/ |8 G8 M- `
to move-turtles- Q1 P: u, I" X+ g' H
ask turtles [1 }1 j& D! u+ G9 b. |
right random 3602 R. x( E2 r3 [+ I& ]
forward 1
7 ]' Z3 W1 L# A set energy energy - 1- v* n6 D% C6 b" [% \
]1 J6 R9 K( T' m# [' n$ C
end# e) j3 l( u5 A3 Y2 j
to setup-patches
2 P9 N5 X& U+ @6 a& M) l8 | ask patches [ set pcolor green ]
& U- e+ w& f; uend
! O% B, z+ E: n/ f3 V3 p; K( Eto setup-turtles
- ] s6 y" M, [1 c" |/ g create-turtles 100# v9 B h5 [1 ?1 j$ V0 l
ask turtles [ setxy random-xcor random-ycor ]# ^" {- T' ]: n5 J
end
9 u$ H% r( ]' V" V$ l1 M! Sto eat-grass
F* W3 m2 c- z+ L2 _& _$ b) w/ l9 Y( _ ask turtles [6 M3 r( I4 Y0 ^: T* D
if pcolor = green [
" O7 m" a) @5 l3 o E1 N8 ] set pcolor black
3 |0 I& l. B+ W% r6 s set energy (energy + 10)
/ h! B' H ^" u ]
! U; |6 F( y+ T5 ^- J- H; f ifelse show-energy?8 e e( f& |7 Z3 ^2 d) x# i0 R
[ set label energy ]
/ a4 b1 _7 p% N* Z- S5 C [ set label "" ]) K2 q7 j3 \# ]" E3 h( F" @$ O( u
]6 l0 a: c c+ r0 R+ G3 E" R
end: S8 u6 M2 x% {% l
to reproduce
6 x/ r0 h; W1 h( P! n2 h ask turtles [$ ]) H* n( p) g+ L
if energy > 50 [
0 E$ i5 m6 C6 p, g. b. d: B set energy energy - 50
) Z. c, v$ v+ {* d& O3 b9 p hatch 1 [ set energy 50 ]
7 k G& d9 R3 O# c. J* h/ _ ]
- f; G' u$ Z2 D9 i G( k, D0 E ]; B, j3 B# F1 Z M% l1 B0 V
end
1 o9 m) x) x0 {$ O5 J5 F8 gto check-death9 x9 Y5 ~* r: E' v7 l$ D2 d/ ]! i; D
ask turtles [. E) @$ P) z: _6 F: V5 I
if energy <= 0 [ die ]
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end
' y) n0 J4 E8 U! A* \to regrow-grass
+ F- k3 U1 |4 F* Y+ K' @$ N ask patches [
5 i3 {+ B5 X! B" [ if random 100 < 3 [ set pcolor green ]
0 n% I1 h, n/ ~3 ?- i ]9 s d0 ? R4 e {2 n; D
end
* |3 R1 Z- ?2 X9 F! D3 |, Xto do-plots
4 D! t* @4 O( M2 e8 w* d# J set-current-plot "Totals"
- A- H5 F% U, O( }: c# | set-current-plot-pen "turtles"
f! p8 S6 q* `; V plot count turtles
; d, |. o; z" |' c' R$ V# ] set-current-plot-pen "grass"3 {2 y! L5 ^8 s$ b T/ o2 ]
plot count patches with [pcolor = green]4 Q0 x& B6 k/ |) n- Q
end# _" e# t9 E3 J7 E1 ~5 t
可是运行时提示no such plot: "Totals"
, l- h+ W- u4 O" \ jerror while observer running SET-CURRENT-PLOT
Q9 V) m, u: t' J0 }" z) b0 B called by procedure DO-PLOTS
9 ^ j+ a3 q) H* H0 h$ H called by procedure SETUP6 q2 ~8 M+ I3 D# V+ B. G
called by 按钮 'setup'
3 q$ _. a4 l* P V$ x求大神解答啊 |