我编的程序如下turtles-own [energy]" q# \) d0 C- \# e
to setup
* A2 f6 p' w" i9 q/ s clear-all( p3 f$ E* a$ x7 v
setup-patches
4 G4 {4 e( ?4 S2 r0 K: S$ M create-turtles 100$ q. k1 P0 _8 W- L7 Q/ g8 }3 ^
do-plots) Q( C- g6 |% i/ o G
ask turtles [ setxy random-xcor random-ycor ]
5 ?( f v9 W% c/ p/ t) F5 xend6 T+ P2 r1 @0 Z+ c
to go& @* u" f9 z: q8 ?( C6 D8 P5 ~
move-turtles2 F4 Z7 H! |* M' I- t
eat-grass5 ]" n' B: y& X% S2 B1 `7 n5 O% M
reproduce
: k, ^2 p7 \2 L' E1 W" h check-death
`- ]; \4 Z! V! `% r regrow-grass. K* O9 S1 ]! [" d& r5 E) v
do-plots
& u4 c% V9 ?- wend Q( I# O4 K) p4 s: Z6 Q0 {
to move-turtles
5 k$ e2 ?. i6 h+ {0 h A ask turtles [
/ |8 C7 ]5 ?2 x* |( K6 U. q right random 3609 [9 m; H! ]" R+ P
forward 1
7 E& ^) C' p3 Y$ l' q: {5 F4 T set energy energy - 1
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- W r5 ?# H' p: r" ?1 pend) I" D: W$ ]% G2 X' ^. T( {
to setup-patches- ~* |" q5 d& O2 }) n L4 z5 c
ask patches [ set pcolor green ]
$ c. ]0 F) o& g% k+ S; Yend
5 s7 \7 {) t' W& v# R2 Gto setup-turtles! K; _9 V) I. U% t
create-turtles 100, {8 ]1 `$ I) s. g5 f% H* S
ask turtles [ setxy random-xcor random-ycor ]+ k' D" A4 m9 G+ ~: K' B
end5 q9 \ {' T- ]$ f* X9 Z% \( U2 z
to eat-grass
9 }: g5 ?( D* n1 F/ n. T, R1 ~3 n ask turtles [; k) d# g% S# {1 u
if pcolor = green [( g( U- e, g5 F# v* m- y: L8 x3 A$ Q
set pcolor black$ ?' L u2 b$ J4 t" a4 n# [0 P
set energy (energy + 10)
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ifelse show-energy?
" Z V4 i0 n) l7 k) y9 _ [ set label energy ]
- a- j, \4 `/ \ e [ set label "" ]
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end$ ~3 L( A8 s* O9 q. {8 ^8 E: H5 J4 m
to reproduce8 K& E a& B6 a7 Z; X
ask turtles [
) P$ x8 Z" H3 l% K if energy > 50 [
- C/ N9 j3 G) N, v! | set energy energy - 502 h# o q1 v$ w" e* U6 J$ H
hatch 1 [ set energy 50 ]
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end# G! Y5 Q) O4 X4 J
to check-death$ \+ ]9 M( k. ?
ask turtles [- {+ y/ q% n9 N4 G1 R; j' C
if energy <= 0 [ die ]' y8 _1 @9 h; K0 v8 g
]& @7 a0 D( ?9 o
end
+ |4 t$ n: m! r: d5 p2 _# W, K' Uto regrow-grass
, ~+ K: Q; L, V3 h' c ask patches [* {1 Z5 T" \( @* L0 S
if random 100 < 3 [ set pcolor green ]
! q7 B8 b4 P. O6 X% u ]
. w5 d3 l$ U: Cend1 s( {$ p: K2 J/ F- {! I
to do-plots, x$ g' L8 s+ G' v
set-current-plot "Totals"
- Y& u' _! I2 W& r8 j+ ?+ t( X set-current-plot-pen "turtles") Z8 F% Z/ U5 Y5 b. }% M
plot count turtles
3 ~! G, l7 Y5 l1 r set-current-plot-pen "grass"
3 @' [1 E- V1 \$ O plot count patches with [pcolor = green]
4 e7 n5 a0 n L& A7 e5 j/ yend
3 m5 {1 X3 W: Y可是运行时提示no such plot: "Totals"4 @3 l0 Z; `) f: M9 q8 \0 }
error while observer running SET-CURRENT-PLOT8 a/ K, T1 O' ]0 O
called by procedure DO-PLOTS/ ~ b9 |$ w% k$ i* b
called by procedure SETUP
7 _5 Q' s: A) K called by 按钮 'setup'
4 M$ {7 I0 h n! u Q# E$ U, s6 a求大神解答啊 |