我编的程序如下turtles-own [energy]/ z& U0 c( W: Y* L# [, N8 l
to setup2 V5 a3 f( U: b
clear-all
% m' }1 G2 `2 @+ D* K# o. @ setup-patches
- ~6 V8 }4 K ^* K5 [. g create-turtles 100
$ X/ Z4 H* G5 ]$ c do-plots! t) [2 G& X7 M
ask turtles [ setxy random-xcor random-ycor ]# m1 W/ H( \$ s% ?. s
end
2 ~; A( k+ ^6 M2 C, ^to go
4 B7 C7 z3 \$ Q) x! E# n move-turtles- ~- u: Y) _7 z$ [5 T$ B
eat-grass G" E) p P+ Z; D7 R7 Q# d$ [
reproduce0 b1 T) c- y$ v1 o$ F8 H
check-death
! Z# \7 d" A1 c5 u7 x8 ^+ O* O9 j regrow-grass
0 f$ b; l1 W0 q0 L) z do-plots
& }# c6 m4 G. H1 c; `6 ^; K' send9 Y$ j. e/ _2 N5 C/ ~ W* ~
to move-turtles, X$ W/ t9 \1 a1 x" M
ask turtles [
: O( O1 @$ G2 V7 H) h- u6 J right random 3609 q! ?) N. B! a& Q
forward 1
& E6 C0 ~* I _# ] set energy energy - 1
* K5 }. `# v1 F! t1 g ]" [7 C' j( A& G& e
end
* R" f1 w0 F7 qto setup-patches
% w/ b% |8 g5 w, R ask patches [ set pcolor green ]
" v ~9 W! `8 q) C7 oend
. c, c3 m, r' O: D8 @to setup-turtles
8 V4 S- y, g2 m @# P7 f create-turtles 100
4 o* v2 \, q- K' I" R( i ask turtles [ setxy random-xcor random-ycor ]
; |- Y# e% x% C, ^9 H; k1 `. e5 K! Send
, i- ^& ?" g7 [" h+ Dto eat-grass2 k( h% U& Q% P
ask turtles [
# s2 _& z5 O+ ^1 v/ P# ~; g& g if pcolor = green [1 p2 \: L' q9 b# |$ J$ m& o
set pcolor black
- {& X! |; G! y, ]( N1 T9 ^ set energy (energy + 10)+ o" `4 M( S) A
]
# l/ s7 Q, `% I5 q2 l ifelse show-energy?
2 J# G3 q& X6 ?3 O* t0 |6 v [ set label energy ]7 X$ Y( l$ k6 m5 s/ O1 y/ C! x
[ set label "" ]
7 h7 |' V5 s- y! e8 | ]3 Q* E2 ]5 i, i1 j) b
end' {) k, v5 R4 e7 ^" H5 {
to reproduce
2 Z6 b* Y$ w2 \& z: R, K ask turtles [' k" l5 a8 K9 Z4 f. _
if energy > 50 [
# X7 d v' Q3 c set energy energy - 50
0 {8 b; u, m/ V' q8 @ hatch 1 [ set energy 50 ]+ Y& L `1 F2 v% [
]
/ c" h: f: f7 ?1 l3 g' x4 K ]' n/ x8 F$ R [( U( L3 _
end
7 y- ]8 {* q* `$ I, i( E% _9 S& Tto check-death
( A$ _3 e5 Z8 s/ I ask turtles [) B! H7 h- U$ w
if energy <= 0 [ die ]9 v, [8 n& g4 S; u! U
]
! a, D0 d7 ]. y5 E7 cend
: A3 Q( ?+ g9 Yto regrow-grass
- B6 @& Y! W, V% `" f9 v9 } ask patches [
1 N+ n D. l# `( u5 m if random 100 < 3 [ set pcolor green ]; |# j; ^4 f( ?, B! I
]
! n* n( O2 J4 V6 O3 zend6 [- N* F: J* K+ i5 r5 \4 x
to do-plots
5 Y0 z' m- z. L. c/ C7 W, a set-current-plot "Totals"( H/ ?2 f" j1 b% x$ r5 x
set-current-plot-pen "turtles"
?# ~5 Z2 O. [+ ~9 C9 N plot count turtles1 L$ t8 V6 q+ _1 J0 P; b) m" N
set-current-plot-pen "grass"6 s" w8 l$ Q! X6 t3 D
plot count patches with [pcolor = green]
8 Y g3 [2 P. M5 \5 ~end& Z1 X- P! `* u
可是运行时提示no such plot: "Totals"
6 y w4 [* v7 E' serror while observer running SET-CURRENT-PLOT
, t( ?: P" g' U: c8 ~ called by procedure DO-PLOTS, g7 G( o; Z9 Z" a3 y
called by procedure SETUP& a! C7 [4 K8 _: v/ Q
called by 按钮 'setup'% T5 v% o( X+ a+ ^/ U6 v
求大神解答啊 |