我编的程序如下turtles-own [energy]
4 [$ e$ K! ]. Y, Qto setup
5 Q- R1 _- ^ E' K# y clear-all! B c7 [1 c3 e* k- V1 h
setup-patches0 W% ^, @" z* p
create-turtles 100
- e9 C2 {/ @7 k1 I1 @% n9 ~ do-plots
5 X! k8 O2 J- L9 V9 i1 D ask turtles [ setxy random-xcor random-ycor ]) f8 v/ ?+ S8 x" _+ x( l
end7 c( z* g/ [0 }( w4 D' F2 v
to go& H! }: |8 x M
move-turtles
3 P6 y% V& S4 e8 P; n) j. ? eat-grass# u# L+ g$ I! A! S/ Y% P6 o' ~. e& c* q
reproduce
, T1 k. L6 u l; m check-death
+ h* }' N; p7 Y6 J3 a7 S" h regrow-grass* D2 {& }' r1 Z8 b' R6 `
do-plots
& a& e; L+ \( e2 `) c/ Eend0 B; Y- L1 R( D$ |- ?9 k* c
to move-turtles
; Q8 I/ n' V4 r0 U! C! o ask turtles [' o; V0 ~- ?3 {+ l7 C
right random 360
/ s. U5 X+ ?/ e# i) K forward 1
) t* o8 b$ e1 ]7 _) s! B$ k j set energy energy - 1: h- g; v- |4 S' _ I. ?, |5 R
]
$ m4 G" ^/ D& O G9 a6 Mend
7 z, D' L, F" o; B8 eto setup-patches) ~0 E* _) d, I3 d$ Z- T
ask patches [ set pcolor green ]1 I, B3 D& k% n+ B/ m/ Z" ?. U
end
& G0 Y$ \8 @& e1 h( Lto setup-turtles: { V5 @% J7 k$ n
create-turtles 1005 e+ A+ I$ W* L- B4 a. D
ask turtles [ setxy random-xcor random-ycor ]4 {, O0 h m- q/ d B j
end( f3 l8 \6 ^/ A8 O# a! F% D
to eat-grass) }) H2 f) n8 a+ l( M
ask turtles [' ?# N# [( V+ c+ T
if pcolor = green [
( R( r5 p8 b" }) c7 M: i set pcolor black* j0 K5 o/ ]0 Z8 d* f+ U/ Q
set energy (energy + 10)
2 | V; J+ t" N; v) U ]
' f; X5 f% J* z! H( W8 N; w ] o! e ifelse show-energy?; J# `7 H) V7 R/ G+ U& v* ~# D
[ set label energy ]
1 |" L& Z0 a6 Q0 r, w. N [ set label "" ]
5 y4 O, `0 Q* Y ]4 n& n6 ]5 Q& L8 e5 S
end
2 K! Z' M$ a# ^# h5 H2 Pto reproduce" s3 t/ W( _" Z* U* P
ask turtles [
. m/ P% G% E3 F8 O u+ R, y" {9 O8 K" M if energy > 50 [
; S% o1 N- S+ j. @7 {5 i set energy energy - 50
: R* ]# L4 R, q! ^( D* V hatch 1 [ set energy 50 ]1 C# t% m7 E, Q: L- W9 G
], A9 c; u k# w0 x9 I
]
( F9 b# F& F- Y8 cend
* @% k, O) e' g3 I! W/ b' \to check-death+ I% W# I, F2 N5 S. h* e3 N
ask turtles [
: G. L+ ?6 p3 [8 [, o if energy <= 0 [ die ]4 O) y6 Q3 p( c3 B$ k6 K
]( I3 z2 r( g' {7 _; m2 \ Y: ^
end; \" V' I2 U- C# R- c- u
to regrow-grass: x* J$ F3 D9 I! q' w; _
ask patches [# g/ T& d5 Y& A% O. `" b. R1 i
if random 100 < 3 [ set pcolor green ]
8 t0 y, V' U; L5 c/ p4 x7 F ]
. E( E$ a. T! i- @: L/ Cend
# F' t! s c: `7 u L' B7 a9 Bto do-plots8 P( r% ^& d, y/ B
set-current-plot "Totals"
1 I0 U9 @ ]2 I+ B- p. \' G+ } set-current-plot-pen "turtles"
! C/ M! r! g1 x( ]+ N plot count turtles
: j- W5 T# x4 L7 u5 { set-current-plot-pen "grass"; y* Z" S3 l6 X7 `
plot count patches with [pcolor = green]1 b- m% e D/ {/ E( ?. b% q0 q
end
$ ~( E, u, ^, x: k c可是运行时提示no such plot: "Totals"
7 h4 L5 e& ]0 x) ierror while observer running SET-CURRENT-PLOT
0 Z! i# Q$ D. c% j' C' h& b5 j called by procedure DO-PLOTS
6 \9 c; S6 R0 \2 H, a/ X& b called by procedure SETUP. E0 i" L0 a B" w+ X2 l
called by 按钮 'setup'
G/ \& q2 A/ A, e& ]8 x, A. p求大神解答啊 |