我编的程序如下turtles-own [energy]
9 x) |0 Z, W8 [4 `% f/ Q( l4 lto setup. M; C7 x i! V$ r3 A, `7 X
clear-all/ R/ ~$ U- K+ C3 [
setup-patches
4 e- f6 p. b. x7 h* | create-turtles 100
1 {7 |! w" M- X% {- V8 @* [: V do-plots3 U9 E3 L' d% v! l# u2 w* D- @
ask turtles [ setxy random-xcor random-ycor ]
1 m M' h0 R: [" O* {* jend
) q! E! O4 w/ J: x3 I: Pto go
e7 \$ G- H* w/ E/ r move-turtles
3 t( c5 I. ^. T$ }2 h! V eat-grass
$ {; j) U1 u2 X. {8 @3 \ reproduce
3 V" P) W, n0 @' j9 M- g- u' u check-death
6 y; f) k+ D! u! _7 n p) |# G regrow-grass
+ W; v+ w0 x3 v# S$ p* O4 B do-plots
; \4 L E6 F/ h/ i- \& a: Lend9 y) j+ m5 {- _
to move-turtles! u6 F" B/ L' D k' s
ask turtles [
" [' R" @! ~; t8 E# Q& r' _- b3 e right random 360
* e& h" C Y6 W$ r' f/ H) s. L forward 10 E0 [/ J8 N% e5 m: |; {( W/ o, \5 w
set energy energy - 1
1 w, M" ]2 s* [! c! I& T g( W& d& O ]- R6 c% t( L/ `* ]& I; U2 R
end3 |3 \8 V- l+ I8 n
to setup-patches
4 `) F; V% s7 k% W; U" Q ask patches [ set pcolor green ]$ s* T- t2 r# ]- p* b
end2 _: N7 ?( n: e7 S9 n/ _
to setup-turtles
6 B! c( n) s6 Y. b create-turtles 100 t* H: E' a; I% e& r" R, G& g
ask turtles [ setxy random-xcor random-ycor ]
+ c+ B8 ~- V; i+ U! Xend% ]8 d: p L; d1 c* V2 X; {5 D
to eat-grass( J* W% s3 ]8 x6 Z: u
ask turtles [" s2 h. m! c* w6 a* |+ r
if pcolor = green [7 c$ N6 |2 Q3 Z' ~ T
set pcolor black
; y8 E/ ^5 H3 L% r& Z set energy (energy + 10). o! D0 \! T# Q# t$ E \1 s' w
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ifelse show-energy?
- Y2 t6 y1 R: J. N [ set label energy ]
; Z: `# Q- z* b: J! L' L [ set label "" ]
+ ?+ b9 u5 V& @ ]
8 c( b; P$ g r$ _0 U/ X. Jend
4 d* z, A4 w% V& r' X7 N% Eto reproduce
; w, V& c0 A$ ]& o ask turtles [- [: o( _7 N$ p; ^0 W
if energy > 50 [- ]5 O) P! c1 `) S' \2 v% O
set energy energy - 50' T# v# R. q" k- F- D1 Q9 ?
hatch 1 [ set energy 50 ]
* l8 [1 t- R* n: z2 A# w ]: y# E' D7 K [
]
* G- r0 }/ o" x+ \) Qend
, I) R0 G* P) sto check-death
4 i% L4 A3 G2 d8 A; @9 W ask turtles [0 ~: M/ [0 H- y, ~- Q7 I
if energy <= 0 [ die ]
; f0 Q( y/ u3 }/ L/ b$ ? ]
5 I8 i( @; q' Dend' x+ a; i# c8 C4 m
to regrow-grass
" a! S& \( C" I) [ ask patches [7 F) p" D* x- R
if random 100 < 3 [ set pcolor green ]0 Q3 V+ N# @3 a& M
]
. i5 p! e% b. eend- m( n( R# U4 E0 L
to do-plots
; p) A; ?. I3 g& \- l: t( B set-current-plot "Totals" `4 Q4 Z1 H. K2 o) X8 [/ P0 j8 z
set-current-plot-pen "turtles"2 G- c' o, b6 B' h9 g
plot count turtles/ @+ ]2 T, T9 d6 f5 Y; T5 C+ X- a
set-current-plot-pen "grass"
; O" s$ `! }3 b( \) B% ]* h& ? plot count patches with [pcolor = green]+ t* ? |2 s: w* l# I9 l
end
7 `8 U: j8 {- M) b0 j可是运行时提示no such plot: "Totals"
% H. m; m, H- J1 x- d# kerror while observer running SET-CURRENT-PLOT
9 r5 F2 \) G' I0 A/ l, m# F called by procedure DO-PLOTS# {- I' q: L% d7 ~
called by procedure SETUP
F* E' h" E9 E0 ?' S called by 按钮 'setup'
; V4 E6 b: x0 X. v. U m4 \求大神解答啊 |