我编的程序如下turtles-own [energy]
5 F8 D* ~" r$ y" f Fto setup! R0 @/ k! b B0 t; }* f
clear-all _; g% m6 C% w. k+ F; M
setup-patches" n9 Q4 o+ H0 V! k! d3 I1 e' L
create-turtles 100
, X( b3 b7 H4 U/ w: { do-plots8 q0 W3 J- g1 v
ask turtles [ setxy random-xcor random-ycor ]- j$ s" ]1 R I" G" X
end
3 X. x {$ j3 A5 x, _2 Z o5 hto go
2 X7 J" K* u$ @3 t% j- D! P8 O move-turtles
' g/ M% Q2 ~$ D p7 e2 @" A! R eat-grass
9 N. m; `4 S/ e! [- g reproduce; t/ j; P0 Z2 s
check-death
9 t1 j N' d$ q3 ~ regrow-grass- W1 m4 {9 S# ^# k( E
do-plots
, B$ h$ B* N/ h# Send9 c) N1 n1 J T9 v
to move-turtles
1 X$ _8 B- o% O' T ask turtles [7 \7 L h2 ^( W' _+ o
right random 3609 z) W/ V3 Y, \9 u- s n' m
forward 1
0 v+ e5 Z. ?$ j6 d- z. r* m2 K set energy energy - 1( D3 E5 S9 y% F4 R! R
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end0 [' l+ ~8 l m7 }: }& Y
to setup-patches( |8 T. {6 m8 A+ m+ Y6 u& T
ask patches [ set pcolor green ]& b/ L6 {) J( _/ J
end. P* q- _8 m: Y& c( G" E
to setup-turtles M8 p( b$ Z' I
create-turtles 100
1 G% G- f3 H% `% Q7 ^8 D# X, N* v ask turtles [ setxy random-xcor random-ycor ]0 p6 f7 ?, V n' k4 s$ Q+ K
end
+ |8 L/ b: ^8 K+ ^' Q! n. E# _to eat-grass2 b5 t7 P# K* t; Q; i
ask turtles [7 u: j# s2 a$ q
if pcolor = green [- }4 ?6 i8 C+ A* E
set pcolor black
9 O% R9 Y4 R: T5 m" ^ S set energy (energy + 10), L8 F' k# C9 e' D. n
]
4 ^( j! K9 R# k& ~- A ifelse show-energy?, |1 A# c' e0 D
[ set label energy ]
, w* |' ~1 l N$ x- A8 n0 } [ set label "" ]% U7 P. _4 H* h8 R2 T
]: E: H) S N: `6 l* ^
end4 d0 P* e9 W5 R: z, c% D" p
to reproduce/ f- \ b; Y* c! \9 o$ O0 n5 g, ]
ask turtles [
/ u9 Y1 c7 O+ q; ^* M. ]9 k if energy > 50 [
6 G r2 m+ W$ [; g set energy energy - 507 z+ @- p" h7 N
hatch 1 [ set energy 50 ]
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]' _7 u T0 S% ~
end+ [4 z8 V8 H0 j0 I
to check-death, O/ B3 E/ Q/ e2 Y' B l
ask turtles [' B: G. Z( p/ q
if energy <= 0 [ die ]: c1 F& p! g: X4 |
]6 H& s* H# ~) r7 Q. T# \" x
end7 C. ?2 L, g+ J3 R% r' \; \: P+ o
to regrow-grass
' z/ f9 O3 k5 A3 N; ` M# t ask patches [- h+ d, [" J- Q! n- P8 o# t
if random 100 < 3 [ set pcolor green ]" B- Z% e+ J# m3 L8 e$ p: i3 I
]- U3 {! Q' `' |; v7 e4 V
end
$ U. H0 J: T6 r [0 Ito do-plots9 X2 V1 B3 M/ e$ A: ]: D5 e
set-current-plot "Totals"
+ M1 K# N, X7 L; f, ?8 c set-current-plot-pen "turtles"
% ^) c s- {2 E+ d8 [8 p' N plot count turtles
) h! b6 A3 w$ y y* q q& q set-current-plot-pen "grass"
' N4 E5 V; p4 V, N1 `3 x3 S2 f plot count patches with [pcolor = green]
1 z, \6 Q# M T* ^. Aend; v D, t5 ^- D
可是运行时提示no such plot: "Totals"
! H, s# L, G8 derror while observer running SET-CURRENT-PLOT! ^: W5 d/ D0 {
called by procedure DO-PLOTS* w. R# |& [$ o; ?. f
called by procedure SETUP C) N n9 z/ I- o' ?
called by 按钮 'setup'$ ]$ d/ f6 `- Y' w, Q) C4 r
求大神解答啊 |