我编的程序如下turtles-own [energy]
( Y, B1 E2 R( Dto setup
/ c2 S4 w8 A( W4 \; t clear-all
' p/ J3 i' C" Z0 W. Z setup-patches
; g8 G! H# K7 b W3 z9 M create-turtles 100
+ c, x8 }3 _ F( H- T do-plots$ C; e# t% N6 v; r# e
ask turtles [ setxy random-xcor random-ycor ]
7 ~* b% p' _, G" F# i" K: hend7 G! w. E& m9 [ |. O+ u0 S
to go
3 F- b' D5 X+ T0 v move-turtles
8 ]: n/ {* v" {% ` eat-grass5 `0 h4 S- q8 Q+ g
reproduce
7 Z' @/ s% v( |& c check-death% G0 l7 F% W0 {) _& j
regrow-grass! G" U) I" _5 D- n4 A4 n8 Q K
do-plots
2 Z9 M$ G" {. }- g3 E) h! |end1 Z4 K" U! m8 p/ @2 P# |
to move-turtles% K/ Q1 J T0 t9 J, b6 E0 ?& c
ask turtles [
2 h& i/ k7 Z$ q, X right random 360
: D5 `" K+ W$ q4 a forward 1
|* L5 W& u3 d set energy energy - 1' L$ F" `/ r' J" q
]
# [4 Z8 f& G, o2 t+ ] o/ G0 Yend2 t& Z5 {3 e8 Q ~( J6 L3 U
to setup-patches4 I7 ?7 A! n$ k0 W0 ^) P4 h
ask patches [ set pcolor green ]% K1 p/ y3 z# X+ S6 s& X
end
, H0 z1 c8 }, S. e0 t2 Lto setup-turtles
1 i) l B' P5 v+ N& i create-turtles 100" ^5 z& d5 Z; n
ask turtles [ setxy random-xcor random-ycor ]
$ f# H" e) Y1 X0 f' gend
" v% A, r' a8 a3 u4 F3 d4 T7 B! Lto eat-grass* D# g* U5 ~2 Q
ask turtles [. J( f) ]+ j P) T3 V+ f& ~. M9 s0 A
if pcolor = green [1 O$ p; O# H* A+ o. B% o4 Y& T
set pcolor black& v8 F* e9 s6 _' v6 N, V; s k! v
set energy (energy + 10), \! K" H$ [" p2 q/ P/ g3 k
]
h! a2 m8 ?- [4 {) n, y ifelse show-energy?, m: D& K0 W' D |
[ set label energy ]0 q8 B$ t+ F& ?/ v
[ set label "" ]
% s- p3 ?" g8 J3 H% F; Q ]
1 y6 d& C0 \8 x0 [+ u+ B6 K% eend
& L1 F/ f. \7 D; Xto reproduce
; _. [3 J# E8 B2 g8 G2 D3 ~& ^ ask turtles [9 R6 b. ~4 A7 F) }4 Y4 q( X
if energy > 50 [
- S* O d, T$ v+ C( t set energy energy - 50
# q5 W/ r4 j8 y hatch 1 [ set energy 50 ]" C0 ^: G2 U1 h! W
]0 N8 z2 ]$ `; s! a$ F, w; F
]$ R% ]+ U5 Z8 g1 ~
end( [! m6 A. d Z) U
to check-death
# {/ p% R: Z6 s2 W- W" [ ask turtles [$ b* `: ?& ^7 T8 U( \0 U- x" H
if energy <= 0 [ die ]
/ E% i3 a) X: y ]* z/ d% d8 z# `) v5 g4 l: U% Y
end3 X6 s# m5 [# V# ~! }
to regrow-grass1 d N& ~0 o" n% [
ask patches [- r: `1 s: |* L+ i0 C5 A7 {4 O
if random 100 < 3 [ set pcolor green ]* {, ]. l2 {, Z0 O' s0 z$ m
]
3 t( w9 |/ X$ k/ N7 wend
1 d$ M- k5 U4 s$ T0 ^to do-plots& L {3 E4 |7 J$ v9 S( \, k
set-current-plot "Totals"5 A0 s# l/ C5 B% q& c) ^
set-current-plot-pen "turtles"
) H2 G6 w2 P6 W- p( c: E+ } plot count turtles. W C- k! V8 ~! W4 k3 r
set-current-plot-pen "grass"7 O/ M# Z% e$ s% ]
plot count patches with [pcolor = green]
1 b1 E' b! W$ m3 K* h9 }, k- V7 Iend- [1 h# _9 _. k! F; ~' `
可是运行时提示no such plot: "Totals"
# V3 ]4 Q# M# X& T9 V! A A5 berror while observer running SET-CURRENT-PLOT
) B' p7 ]1 d" y6 R+ i$ X called by procedure DO-PLOTS( i* C' d0 K% T+ y
called by procedure SETUP8 {* [+ \9 s: e3 k& L7 t
called by 按钮 'setup'' d5 x$ g8 C E, @ C( v
求大神解答啊 |