我编的程序如下turtles-own [energy]" B7 z8 h& ?% J
to setup/ ?( i7 [' R3 q2 r
clear-all9 F/ l/ O: F7 w. e# J6 P/ P4 v* s
setup-patches
& t t& y$ U" K% M create-turtles 1003 b) n! K2 o7 |( [. u! g& m
do-plots; g# ]4 n% v) \& ?- y* H
ask turtles [ setxy random-xcor random-ycor ]
. C' |8 L* R/ h" D! gend) L# c! G/ _ ]# h7 p( Q& O
to go* z% [" T: ?0 y j, T
move-turtles
. V: v& M; Y( A+ d5 n L# N! c eat-grass
- Y C2 G! Y$ ~( ~ C- Z$ Q reproduce8 t8 E. ] I% f
check-death: }0 Y' j/ @& B
regrow-grass6 T _3 X" @3 p+ x3 \( G2 p) d
do-plots; W0 T4 f1 d6 |2 X1 O) p! Z
end& Q+ q8 r) S% L, C
to move-turtles: C0 L, C8 Y5 [8 r
ask turtles [7 X4 _, r9 t2 g
right random 360
& ]8 N, a, e: r; B forward 1
: G: R) e( P. R4 X2 ^7 @ set energy energy - 1
: x& c4 Z2 ^& M c ]2 o" ^& ]* e1 ?: Q' V
end0 A8 i+ c. y+ o0 T
to setup-patches
/ o+ X# f$ Y3 V. ^9 D' J$ u4 y ask patches [ set pcolor green ], v/ D' v% }4 }9 F( z8 ?8 @
end
/ v' A8 Z& e( n6 Yto setup-turtles0 X% O3 Q" d; T2 v
create-turtles 1005 p+ _, C$ F& Y! ^! `) y
ask turtles [ setxy random-xcor random-ycor ]. y$ g( X- B; V8 R" z _6 W- J% n
end$ g% e. J. O# K, N: F! a
to eat-grass7 E4 i+ [7 G' _3 F
ask turtles [
8 ?+ w/ Q$ ]% K' N; r if pcolor = green [
2 l( x' k3 v! l0 l set pcolor black
1 O0 y5 @& t+ p- v! r3 \ set energy (energy + 10)
4 p/ j- b6 m, |" S7 S' I% ` ]
8 N Q \' t- {4 o4 _) d$ o% Y; W ifelse show-energy?
# T% M: W, H% v( m9 G0 { [ set label energy ]/ H, [4 T. D# z) ^" O
[ set label "" ]3 a1 E$ l: \ X
]( f& Y, n& f; c& i
end1 P, O7 `0 [/ b8 m) h/ f
to reproduce
" X* K( p9 S4 a; o# R, w9 _ ask turtles [
3 G% N. K& D4 B! x! V! Y7 q if energy > 50 [
8 N% s" w% L2 K# t# s2 n set energy energy - 50/ Z6 @6 F; v" h" E/ c
hatch 1 [ set energy 50 ]
! Y6 s7 T* Q0 C) x6 J& F& } ]
- x0 F" F3 G6 f2 _/ {8 r2 x; n ]
, \$ d+ V1 k2 S1 oend
2 _6 m D% x# F4 U1 s" jto check-death
; e1 `1 c# I9 j& A8 a) Y) ?+ n ask turtles [ u$ E5 S: }6 x, M# r+ c
if energy <= 0 [ die ]- C1 B. X' b! j+ k; N+ x
]
6 o& k( K6 B$ b. l: R* Fend
: I& I4 f: [/ ~) dto regrow-grass
" `$ N3 {/ `* f5 R" b! \8 m4 R$ W ask patches [; B ]" ?6 y# X3 j3 r
if random 100 < 3 [ set pcolor green ]
4 Q: g7 n5 s6 }8 e- E ]( S9 H4 _& Y5 b2 V" U
end
) T0 J" A# c$ pto do-plots8 Y0 e" e$ r' z, N4 S) i4 Y
set-current-plot "Totals"
K7 E! @' }+ g7 ]/ G: X9 d' F set-current-plot-pen "turtles") O6 s4 @7 P# Y6 m
plot count turtles
; H" @# g3 W; _6 k2 U set-current-plot-pen "grass"% |" n! r y. B$ H7 w6 V! E( l7 Y: s! L
plot count patches with [pcolor = green]- y. } N! I6 P* L
end
1 |$ w: m# x) u& M4 h- M, R, `% H可是运行时提示no such plot: "Totals"3 x ~7 ]8 A4 v/ v' W C' ]
error while observer running SET-CURRENT-PLOT; o j# b6 P3 o8 @( z
called by procedure DO-PLOTS5 V% g) @8 Z# Q# U( x
called by procedure SETUP8 _9 Q4 t9 {. e! C( O m. x& W0 Z
called by 按钮 'setup'
* q6 C. j3 m$ i2 b1 ^' Y求大神解答啊 |