我编的程序如下turtles-own [energy]
0 T% C1 g g8 G" A1 m9 Tto setup
3 O: F0 G- J* D& D6 ^ clear-all
# O! B- S# j( [ setup-patches# e: N% ?# S9 i- k E0 s0 l7 {
create-turtles 1005 e* \0 @' F9 i$ ^# ~1 r
do-plots; F9 E- @- A) e1 V
ask turtles [ setxy random-xcor random-ycor ]8 F$ D, \. G% `; Q3 W
end% j1 G/ q9 B" G5 X: d8 N
to go% [3 w; L" B0 b2 R t' F
move-turtles
! W: o! b% y8 {& a' }8 C eat-grass) T1 k5 L- [4 ~# S" V" U# H( `
reproduce3 W0 w" Z5 ~! t) q0 Q
check-death# J) ]1 u+ x1 n+ j( b& ~# a
regrow-grass
/ G) d; G2 z K. |$ Z; o, l0 x do-plots8 c; n9 [8 ]3 C2 g! M/ W: B! m: G
end
( s1 c7 {; k4 p& \: B+ Zto move-turtles( K6 x7 Q3 H# f! X, e
ask turtles [' h7 W- `" I# W) K1 g) a
right random 360 q( U* f- I( o* X/ X" T9 x) w, Z
forward 1
& ]2 ]6 i9 C, b! k [ set energy energy - 1
/ _, D& ^7 I/ M, @5 ^' l! o ]& P' Y/ m# h. E7 C: v% r& k
end5 l3 h: L( o/ |+ v( x& Z* c$ d) H
to setup-patches+ h; w# M+ a) g5 Y5 Y
ask patches [ set pcolor green ]
* `8 \9 s/ Y4 S$ r. hend* m) j9 `( M3 u6 e# }( w" s
to setup-turtles5 Q5 f+ t6 C: x) I2 u3 g
create-turtles 1003 v& R& l/ g5 [# S
ask turtles [ setxy random-xcor random-ycor ]/ I6 z7 y' G, q( r- F" z% u
end7 H0 o: F' y. P3 W# F' z. \% e9 D! `
to eat-grass
$ Y! R: }" a7 F ask turtles [
/ v, `+ z# h M- C* H7 v if pcolor = green [
( K9 ?1 e6 {' E! J0 I$ r; X" M set pcolor black
- o9 q5 ~% q. @5 M' n5 n2 W* a8 l set energy (energy + 10)0 ~) } @. t+ u9 g& m
]
: @! F/ }" P$ T/ @9 o* s/ Q ifelse show-energy?# _8 x7 D; l' v2 z1 Z
[ set label energy ]
2 N8 i O( [. O: j. [ [ set label "" ]$ U7 j- e! |3 G, W. w
]* d, t6 k8 n- J5 Z2 Z9 }/ D9 U
end9 Y0 ~9 E: A/ D0 @
to reproduce
+ c; h3 P8 `- P6 ~( ]! r# W: Q- ] ask turtles [
" I: h5 C6 b1 ~/ ^6 d4 E if energy > 50 [
/ y% B5 x; Z# c$ r7 A7 f set energy energy - 508 a! s, w$ W' H, i. T+ v6 Q
hatch 1 [ set energy 50 ]! P( G4 w4 S) [: r: [
]7 d, V1 C1 G/ Y: Y- o- ^
]
; \" U$ w. @; h; `end& M* [8 B+ }( L5 H6 {* ?; o
to check-death
: o/ G) J) _! P: ], A: d ask turtles [2 E, j2 D! T$ L5 R
if energy <= 0 [ die ]& d6 `8 I% I% Q$ [. x6 c
]) e% J* V1 h" n. d8 b3 F
end
) v% l, Z# y1 E5 lto regrow-grass
$ e& B: ^; g! I% y ask patches [ ^7 m1 V6 p; g/ Q
if random 100 < 3 [ set pcolor green ] D6 k9 r" v7 r$ }" A. J# |) @
]
1 a: ~& n6 j. g6 O2 ]0 uend
$ k! B+ {, {+ ~( p& Lto do-plots/ @8 A% q5 V; j) _
set-current-plot "Totals"
! f6 n! A9 h' D& z% l# o" k set-current-plot-pen "turtles"0 Y4 G3 f0 z5 u4 [1 G: ?5 T
plot count turtles
. P R/ N6 r+ i" `2 h4 t7 ` set-current-plot-pen "grass"9 ?" d) o* Z$ ]' W0 T
plot count patches with [pcolor = green]* O! P8 p8 v. X0 i* t% k
end% }) i+ b4 Z9 G5 d# E
可是运行时提示no such plot: "Totals"8 ` J. W/ d: P" U7 } I% ?: ^- ~# H
error while observer running SET-CURRENT-PLOT
% n$ v; @& E0 }% R- n' I) h6 a- H called by procedure DO-PLOTS; B) _ K+ B+ P. M+ k
called by procedure SETUP
' d0 g) \0 J/ U" F# y called by 按钮 'setup'4 y1 _6 g$ X4 {& M/ j
求大神解答啊 |