我编的程序如下turtles-own [energy]/ P7 o5 x7 q- p
to setup
$ H4 X0 `! D9 [0 S* f clear-all
4 X# ^3 N8 K& s2 B setup-patches3 R/ i% ^, X: }; p9 { l. ?
create-turtles 100
. Z* I7 \2 k8 o1 @# ? do-plots5 f4 l0 W7 T& }5 p. s8 `
ask turtles [ setxy random-xcor random-ycor ] S3 l1 I5 R8 C k' U; ]9 e' \2 @" L
end
% `0 n5 ~. V7 t+ \6 dto go
& n2 J) t d" z# U move-turtles# L. `) i% C9 {! ^# F6 W
eat-grass) f9 z# i1 i- \! L+ a5 Z6 M. j
reproduce
& [, ^( W( [+ p/ Q& b E' L4 e check-death
5 H, k( D4 {9 [9 Z6 U: e; Y regrow-grass
) N2 I- \5 c5 P, A$ \% R do-plots' [# [1 F3 k/ P
end* O5 C5 g% ?- w8 o( g7 y: [( x
to move-turtles) y( ]' \ U+ F2 d' Y4 j9 K1 q7 k
ask turtles [+ t, E$ O1 a( d( x
right random 360
8 }* d4 k/ M7 C forward 1
2 ?# D/ p: e# h set energy energy - 1
4 l" ?5 g/ P) H8 V ]4 _$ [. p p3 s* _0 l% n5 ] O% |
end8 s0 Q( ?3 _8 x. h# @
to setup-patches* V" w- Q: r W }0 A! v" o
ask patches [ set pcolor green ]
$ K/ u) [. m1 G6 {end
# A# z% x! U; z2 h. I* Tto setup-turtles
1 U% \3 k: J9 N: k3 v' v create-turtles 100. I' f4 V6 |$ ?7 S5 ^
ask turtles [ setxy random-xcor random-ycor ], v e; V0 v4 i) y
end
0 M s5 r' L/ ^to eat-grass
* n/ y7 R2 g& x+ T ask turtles [, @1 s7 `$ k: {+ J, g
if pcolor = green [
8 F+ U* i# B) z set pcolor black6 r) p! q w$ N" z
set energy (energy + 10)4 Y/ l8 h, |; z# s# e. ~7 ^
]+ R5 r7 S( g0 M2 P$ D# ~
ifelse show-energy?
# @( u/ x, h2 S2 C6 e [ set label energy ]
1 p) d2 _5 P; W' O$ C [ set label "" ]* Q& T+ R% T% A3 q9 P* b1 n7 t
]
& @: r2 T; S8 D* y1 ^. rend
8 v; R: Q/ u' R8 v8 Q% w: E$ Lto reproduce
0 N1 M& {. [( D! q8 f" z ask turtles [' ]$ D8 c j0 Y
if energy > 50 [! u9 m( R# ? n6 E6 r: _3 h& j
set energy energy - 50! X6 x* _2 r* z0 {: R! w# q% z
hatch 1 [ set energy 50 ]
- t& v& w2 g0 e- {6 B- }; l4 _6 a& s ]: W% d/ b, V/ o# D% F
]4 T0 o. P1 V! H1 c% J2 ^6 \/ g
end9 H# U; w9 O7 V' E
to check-death' e9 h) C! W, x" a* X1 ], _5 G
ask turtles [( ~2 I$ B3 x( }3 b4 |+ [
if energy <= 0 [ die ]7 w# H" q* b7 ]8 a: K5 [8 K
]
" H8 L3 O" M) r! |7 ^end' @! _) Q/ y! e; ~( N: d
to regrow-grass
$ C* I* ^* t5 ]- v ask patches [
5 _* |/ v# D4 F( q- Q% e if random 100 < 3 [ set pcolor green ]8 s8 L( \1 H; ^& B/ p
]9 n# w& F }6 Z5 p; g
end
! Y' U, F: n4 V6 Q D4 ~to do-plots
3 T4 K; \) |" n( I9 H! l6 O% J set-current-plot "Totals"$ l7 l6 m! I& _9 O8 q7 Z
set-current-plot-pen "turtles"- \+ f" I, R' H4 r1 O& B
plot count turtles+ V& i! q; f8 K0 q
set-current-plot-pen "grass"
8 g; {1 Q6 m% q1 B plot count patches with [pcolor = green]4 n" [7 k! {. f
end
; U+ ^+ n1 @! F" M" a可是运行时提示no such plot: "Totals"7 `1 R5 p7 W& {2 s3 }
error while observer running SET-CURRENT-PLOT
; p5 I9 N( d3 L called by procedure DO-PLOTS
, z: n) T9 X I) r" V7 c called by procedure SETUP
2 u3 @/ \# ?. P. n, O, C called by 按钮 'setup'
& ^ {& j, q) [, C: E5 S求大神解答啊 |