我编的程序如下turtles-own [energy] Y9 D- u# t& N9 ~3 ]
to setup5 \) U' m, H" J& |
clear-all7 f0 k G% T7 n9 k
setup-patches* w; {# c9 p, S; A- X
create-turtles 100
- z& [! |" f9 |% I n& M0 E do-plots
3 M" z$ J8 s) H8 g8 f% T ask turtles [ setxy random-xcor random-ycor ]+ b- I3 s$ L3 |
end% r, J+ M$ F3 [% r: V
to go
* C$ r/ a. L2 x; f" h move-turtles
6 z% J8 e9 Z) w$ r; f eat-grass5 {. d+ |$ _2 w! ~! p) O
reproduce+ v9 ]$ I, X1 T1 F- w: M! L
check-death4 G: z$ v6 h$ J0 y
regrow-grass0 |& e% X3 c/ \1 w4 p
do-plots) V5 U* u7 A5 _! v$ g; q% ]- k7 B3 g9 B
end
. i5 x. Y5 q hto move-turtles( ?; i. P, G; p6 u
ask turtles [
H( z6 Q3 h4 K" f; n right random 3607 s2 O+ K( r+ ]9 j; C
forward 1
) u% Q- Z% k! J8 u) o( P/ a) g set energy energy - 18 o2 }# v1 u% e( i7 I
]8 q. w5 p/ @* I$ f+ y+ b9 g
end1 _' ~6 z, m1 Q9 r0 n4 c
to setup-patches
% H5 X9 D4 l. _; f# H% r ask patches [ set pcolor green ]
9 n0 m; g- ?3 [- iend5 |: }, Y' [9 r' d- ^- w2 m' L
to setup-turtles% r J2 p, y6 M' t! C K" b/ A
create-turtles 100
1 a, l0 e- }. _) l( [ ask turtles [ setxy random-xcor random-ycor ]0 a5 H5 g6 l. D! A) t/ T
end5 w1 b" `0 q) M( L
to eat-grass
) }; N. m5 J: ]5 a1 w( i& n8 z4 t ask turtles [
& }9 o$ ?$ `3 y! C8 h7 W; z if pcolor = green [+ y C' Q! R$ K4 k/ u: y& o; Z
set pcolor black5 o: K/ _! D7 \2 F
set energy (energy + 10)
. y; ^6 `% H3 g4 S4 M4 `3 p$ o' y2 { p ]0 [" d7 I# I6 a3 a0 d5 H
ifelse show-energy?
) l9 f/ T" Z6 B% t$ t [ set label energy ]
' S& J. @1 p, G/ k/ B) G2 \1 k [ set label "" ]
" N ?% ?+ t8 T6 f. k ]
; L) g* q, \& A3 L# }9 Uend% P' n. X {' s3 e
to reproduce
l0 R6 y% s( _4 a' h ask turtles [
9 U7 [9 E7 ?) f9 z8 F+ z$ C if energy > 50 [
* u9 K5 {! ]$ I' c" B7 h set energy energy - 50
: i# L$ s Y4 ], B0 N hatch 1 [ set energy 50 ]
9 c7 y5 H& G. b' O ]
( H, z2 U' D9 c6 J ]
8 d$ K7 J l2 K! z1 ^end
! R' R- N: ]) k6 y) Lto check-death& A5 y) Y( U; v9 p- U. H/ x0 Z
ask turtles [ w* W% H* \) d; D! _3 @
if energy <= 0 [ die ]# W& f& C- s- g6 o3 D2 C* o' O
]) c: d- Q! Q6 I' O# |' `' x
end6 U' d2 L: z4 Z# c% Y. L* x( ?) ?
to regrow-grass f- O2 i2 O6 W( s9 a; V
ask patches [
1 n% s& _0 c) Y! U% { if random 100 < 3 [ set pcolor green ]% N, E1 P) o/ |# X# s) b
]- E. K L) s9 d3 v U7 ~- T" z, h
end D" A* a2 B+ x* `9 a7 ~
to do-plots! n. d6 m0 H3 F# e- e u
set-current-plot "Totals"
5 i' p7 O( i8 q$ x O \ set-current-plot-pen "turtles"
$ G4 H9 N- u* a4 I5 Y2 G; G plot count turtles1 q0 g1 \6 B& V+ j1 e7 ]. n4 R
set-current-plot-pen "grass"' c) `( \4 k' j5 q5 o# W; r) M
plot count patches with [pcolor = green]
8 P( E- Z. s8 Z1 Cend5 a3 c% N" @( v* }. ^
可是运行时提示no such plot: "Totals"
5 N) A# E* ]7 `, L. Herror while observer running SET-CURRENT-PLOT
. h" G0 x' [. Y) a0 u6 I5 z# Z called by procedure DO-PLOTS
1 l7 B) c3 |: H$ A7 \+ m called by procedure SETUP' {. O; z, c9 U. L/ w
called by 按钮 'setup'
0 S8 |, H# z: p求大神解答啊 |