我编的程序如下turtles-own [energy]& F2 R' [6 l N' B# O+ @% \
to setup7 K% l7 q+ \% v& d+ ?/ ]
clear-all
2 ~" U' U; W; G6 \ setup-patches
: w- X& O3 z5 a& A+ \$ z& P create-turtles 100' M# T4 `& I! F: D! }3 a+ `
do-plots7 h# G9 k. J" ^7 Y( e" S
ask turtles [ setxy random-xcor random-ycor ]
' `" V4 X' n6 f8 Dend
. |4 K) w6 }% S/ g% Rto go7 X" _% t4 [/ Z$ k
move-turtles+ X4 k; E- d8 N) L2 O. h( e$ q( F" i
eat-grass
1 }- V d; j, j# f reproduce
$ f& i4 Y- S7 W( w8 n3 D check-death
2 }0 W1 n+ D$ F# N! l& _ regrow-grass" D" B' g5 K3 P' E( N
do-plots
' K) P3 [. j; \5 J$ B D" K# fend
3 S8 `0 E8 V& {9 H) D8 T7 Cto move-turtles
7 I R+ |" ]: p( l9 V, W ask turtles [( ^! E$ c' M. B& x& q3 J0 F
right random 360
+ I9 @2 d7 x7 C* G6 R5 W+ d5 d, c5 Z forward 1$ \2 u4 y S; b1 ]9 ~
set energy energy - 1
0 F' X" f2 A8 L) A3 Y ]
- j5 b- U0 w9 e G' Fend
8 v; {0 O( h* j; b2 Nto setup-patches8 e1 l" {) O6 i9 U! G" @# g
ask patches [ set pcolor green ]
/ Y* l* ~, j# l0 Fend
! Y6 M$ X' x, \% _, V. _to setup-turtles2 ]5 y7 j: z t
create-turtles 100! D: z' q0 C: @. _0 V
ask turtles [ setxy random-xcor random-ycor ]
- d% f& G2 D3 zend
9 Z" d$ c' K* _6 A; K" fto eat-grass
8 Z# {9 j1 t1 V ask turtles [4 u/ j: F w3 a, T6 F
if pcolor = green [
3 d: [# h0 Y/ V& w7 g& V* p set pcolor black* Q; R( Q" B2 c4 q, A# W
set energy (energy + 10)
0 I7 a; [4 m C* E9 v7 n5 c ]. ^$ | R: V0 u! W. ^( d' @0 I
ifelse show-energy?
! f4 G6 O% F7 U2 S( a4 r# R6 P; ^; A [ set label energy ]' m0 p3 O4 B; u$ q9 d5 Z4 q5 G
[ set label "" ]3 s' \/ G* I0 ^
]0 K1 h0 P Q" k! Y* b6 `' v, N, o
end
, D5 l- E) _( w- ]# ~6 ] Cto reproduce8 t- ^4 D- H, |1 ~) x: f- @: o
ask turtles [
: a/ Q; D: q5 E$ O. @, K/ ^ if energy > 50 [( e# s( A2 o0 Q' o5 c
set energy energy - 504 V4 \2 S/ v$ M
hatch 1 [ set energy 50 ]
3 j% n3 {6 N( J* | ]6 u. `8 b, z: C$ K# n
]0 D- L( C! m- a4 g4 T
end5 P& r% l! z6 C8 J0 a
to check-death- w, p6 V# H5 F
ask turtles [
7 k* ~' H: |3 A if energy <= 0 [ die ]0 \2 O# [5 g2 @" S
]
$ M8 O8 k$ w; ?6 X- Zend+ _% m; `& R0 h5 S, i
to regrow-grass
5 @! \4 X2 f( D$ I ask patches [
& v* Q: ~4 P) l+ r, y$ m! ?, q if random 100 < 3 [ set pcolor green ] P& L1 h& {5 f
]2 t5 _4 v" Y$ G$ s. W
end
& e/ a/ k! k; Q" B wto do-plots
0 A) q0 K. z3 V. Y- J5 I% l g set-current-plot "Totals", U- J. S$ J/ `# u! Q& f6 v7 l# f
set-current-plot-pen "turtles"
! p/ Y: h$ k$ S, I$ F plot count turtles& `+ h7 _1 p- K/ |
set-current-plot-pen "grass"# k# V, k9 w. Q3 S
plot count patches with [pcolor = green]
' p& V' d, q; |0 M& L5 X( Zend% R }: p2 H* G& ^8 n. u
可是运行时提示no such plot: "Totals", `# j0 u* W& s* y# q
error while observer running SET-CURRENT-PLOT
! `- y* W; D5 S$ r! r" H called by procedure DO-PLOTS/ B. D2 O: D" k3 z) }7 W# Q; P0 o
called by procedure SETUP
: p7 M: M( h5 s called by 按钮 'setup'1 g! T2 j* d1 i- f' M. }% o, v
求大神解答啊 |