我编的程序如下turtles-own [energy]
% m+ B3 W5 ^% q! q% xto setup
8 b& U% L- S+ g clear-all
- Y% M2 I6 h1 h setup-patches$ ?9 v0 o2 h# o% O* E2 l. U( v3 L
create-turtles 1000 W, V" J/ C5 x
do-plots
, d3 M5 o( p! v1 X7 s& { ask turtles [ setxy random-xcor random-ycor ]. \& x, c3 C2 Y+ V; ?4 R3 ~- C# O
end
# P$ p- ]3 Z/ x2 }: _6 k( k' Nto go$ u0 ?+ V K" X- W) [6 T7 C
move-turtles
5 i9 _4 A: ?( c, S @0 m& T eat-grass+ c' d7 w, }9 N; z8 |3 u- t8 S9 ?
reproduce
$ a; y+ p; R# p( r' a$ e+ Z check-death
/ a1 _) Z* A8 M7 Z! ~ regrow-grass0 a( G" X2 h- e7 t+ w3 o- o
do-plots4 e9 O8 X& @0 h7 c3 N' r+ q
end
B8 Y, t, o# S [) b4 c3 ^to move-turtles
" X9 A5 ~2 V& ^; ]4 e ask turtles [
% X+ h% x' Y3 x& ^( P8 }: y" [+ | right random 360
' E! v3 ^8 |0 m+ b& P( v forward 1
1 f0 a: X! N% c% R set energy energy - 1
- h1 o' f2 c3 m/ j5 c3 q7 Z ]
/ O; J, |0 f8 G' E9 wend
! b4 e( F% \+ i/ |6 Q4 Eto setup-patches
& l: {6 h1 n/ l0 }3 b: A. V ask patches [ set pcolor green ]
) a- p$ P: I/ Y! tend% Q& t/ k. N- q' J, M
to setup-turtles+ |4 |2 c5 n' M) C
create-turtles 100& S6 X' t" E+ ~' s
ask turtles [ setxy random-xcor random-ycor ]; _" V3 n6 P5 H; {
end
! ?0 N/ r9 Y5 y. jto eat-grass
8 z# u$ b/ C2 e e# a$ V ask turtles [
; E% j$ z' y" F# c; X5 M5 S if pcolor = green [9 a, F/ M4 m1 d" A5 _7 x: A
set pcolor black
2 \+ w) u& D# m1 H( t! G set energy (energy + 10): u% l8 ]; o$ s/ X6 a+ P) E1 V$ B
]
" O7 o! \+ t* O ifelse show-energy?
1 @% C& |1 f2 h9 B [ set label energy ]
6 c" A" f I" E7 Y; a5 @3 | [ set label "" ]
- ]+ t9 D" _9 P% I/ z% X$ }3 m ]
7 N$ G6 V+ a) v+ Yend2 S8 G& z! J7 v6 z. Q' q5 K3 s$ [
to reproduce: y# X4 O! o/ ?5 q- m0 l
ask turtles [- q, N. f8 P# h) b5 j# _8 O) Y; y
if energy > 50 [
+ p3 m2 i; E5 z y; F; X set energy energy - 50
/ P$ H; S1 Q- n% ] hatch 1 [ set energy 50 ]% p) L# J. ?' G! ~6 c
]* E: A. M$ v2 j* s2 J: g# ?3 B
]
! Q& p! @; L+ E! @2 `, Wend* \ H1 o) E- s. a x
to check-death
@% @' W. ^. L$ `0 v3 v7 A ask turtles [+ l, P3 q0 ?1 K& E! o; V
if energy <= 0 [ die ]
2 b; ?9 V1 f, c3 T, c9 v) e# a ]' H0 M% p. ?$ J C, `
end5 N: i) f: \5 ~- c) o7 N. W
to regrow-grass$ H- H* \3 T7 y7 t7 Y' s L/ V
ask patches [
0 u- t y2 P8 X if random 100 < 3 [ set pcolor green ]* x! r B/ `; a2 w7 K5 h& Q
]
3 z1 x% p' N' x3 k4 l* b( R4 hend B" f4 p" x, ~
to do-plots
8 w e/ v5 ?6 N' K: h set-current-plot "Totals": v+ H+ t, }. e! j, x6 x" h
set-current-plot-pen "turtles"
; E: a% [$ r m$ J+ B' T- N, i plot count turtles
9 c5 x1 d0 B6 N' e9 G3 R5 v9 T set-current-plot-pen "grass"1 }! ?- w6 o. w) u# J3 Z
plot count patches with [pcolor = green]& c" L, L8 X. d
end
; c& t- E* z9 n3 a: o可是运行时提示no such plot: "Totals"
' K# H8 t3 G7 y+ {- x+ j# ~3 M8 @7 ]error while observer running SET-CURRENT-PLOT
( `) h( v' P% t. G5 z1 R; ] called by procedure DO-PLOTS/ U& j; z" h) E* E
called by procedure SETUP8 A9 p4 d2 ]5 G
called by 按钮 'setup' d5 u, M0 {4 I& ?
求大神解答啊 |