我编的程序如下turtles-own [energy]' {/ s" |2 c7 h0 s/ O
to setup
: [7 h6 Z4 o, R7 X. U# l clear-all) L: O2 X* I( M
setup-patches
7 l5 E/ H6 W2 ^# y create-turtles 100
% Z/ W0 F4 C% o. P; s" ~0 ? v( T do-plots. ?6 H( @7 A# y) h! J
ask turtles [ setxy random-xcor random-ycor ]
% e* i: [+ P' R; g, Gend
# o" T3 d5 }5 T( G+ n$ Lto go
) m! }$ ?1 y) P5 _ w move-turtles
) T, T6 s% l; K7 ] A eat-grass
k2 v2 }, H& R: w& S reproduce/ T: w# F+ [+ R+ p) g8 R
check-death
& t8 ^2 A; R T8 z0 p7 Y regrow-grass' a5 k% f% [* o! A' E! f
do-plots5 H, h- Y0 c: N: E1 P% ?) V
end) d: ^; d0 h( x
to move-turtles' O* n/ y3 S2 P+ Z& S* x V& x
ask turtles [
2 H9 c" J/ J# h8 X. | right random 360" A' U$ G' c- {" t; U+ O4 T" M
forward 1# X( N( j8 m9 _' k3 ~
set energy energy - 1
: @4 e7 U/ }* B* `) G* s ]
$ O% Q5 y+ n2 t. L7 cend
6 R9 B8 n. N0 y8 lto setup-patches. A: D# [% g) S/ S2 |
ask patches [ set pcolor green ]
. F8 v) Y$ F5 W/ o$ A4 h. send
' c( U1 K. ?* N: ]to setup-turtles
' E( t" D6 w' b8 w! m create-turtles 100& V& p! B" {: b2 _& E
ask turtles [ setxy random-xcor random-ycor ]
# y F' q4 P1 Y: {; G! t9 M& Iend- B- h! n4 h* r1 o% B# h; J5 h
to eat-grass& M2 P. A' T! |" C, C
ask turtles [
/ k8 l! M2 @ C- `8 g1 V D if pcolor = green [
, _: ~! i% c" ^ set pcolor black
$ o( P, O6 X6 k set energy (energy + 10)
5 n0 Y+ Y- S4 M ]
% D4 b& }/ z* x2 ~+ H% A ifelse show-energy?. `" c( b3 D: [8 W" Y T; b/ \' q
[ set label energy ]) _* J: d' z, H# v/ `
[ set label "" ]
$ _: U7 J& {8 w ]. S5 G8 A% H; X4 y/ K
end5 w. _+ \! Q. n& k! d
to reproduce
9 V* I5 x2 Z- }% x% D8 m ask turtles [7 Q; t5 ^* J/ X: G
if energy > 50 [( E$ r0 j9 e( u2 X- l/ o" n$ A
set energy energy - 50
# |& K9 R8 |' E* }7 c& h' e2 K hatch 1 [ set energy 50 ]
+ D' q: M- _0 A N ]* d+ l0 M, V$ V: D, u! a/ _! D1 G
]
* v! z7 J( E2 Y _& R% t) Tend
! {- T0 L/ n9 Sto check-death9 l* M( z$ ]8 _5 {0 Z2 Q$ z1 P
ask turtles [- n2 E, z: t0 Y3 z! \
if energy <= 0 [ die ]# j1 B! a- m o9 ?$ d5 y# b9 P5 `0 X
]3 w1 C7 g2 B- ^. Z7 T- b
end( [+ U: X- i! M* h3 n
to regrow-grass8 ^. N4 o0 w# m) d
ask patches [+ T2 U y% z8 R% c% q" o4 ^3 w# p3 F8 Y& Z
if random 100 < 3 [ set pcolor green ]
+ q2 O9 @0 i0 T2 ^4 X0 T' A ]
! M3 @( S8 h5 Q2 F6 xend
, b7 `# H0 @9 m, N6 C- U1 Uto do-plots7 n# u) o3 q9 A" g. s; ~ }+ O
set-current-plot "Totals", r0 Z9 d# `7 K& ]) j
set-current-plot-pen "turtles"5 J" P+ o$ R0 }+ W, b8 g/ x+ g
plot count turtles$ H' V' }+ Q$ x: M: b7 s$ ^5 ~4 n
set-current-plot-pen "grass"9 \0 C# _, ~$ W. V
plot count patches with [pcolor = green]
, g! [* w c; ?8 nend' g0 [1 u4 k5 n& e% B/ s0 P
可是运行时提示no such plot: "Totals"- [) t+ f6 Y6 Q0 t" [
error while observer running SET-CURRENT-PLOT
. z- ]5 O; S+ `9 x called by procedure DO-PLOTS9 V$ v5 U- _3 b E) L1 w0 W' P7 T+ v
called by procedure SETUP" x( y3 r2 s: D4 I
called by 按钮 'setup'! _; G w! K" X ~4 r
求大神解答啊 |