我编的程序如下turtles-own [energy]
& O4 c; c' R0 S2 n, Pto setup
7 N' }7 V4 }$ F! X clear-all
2 L0 @" A2 C; g9 X3 t2 R- ? setup-patches
7 c) k# q# d2 w% f s3 O create-turtles 100
; a) R' W' p! l/ t/ B4 _ do-plots
5 |7 z) V; V, U& ~7 H; C ask turtles [ setxy random-xcor random-ycor ]
% k/ ^ t- w2 x2 T6 |4 }end
% y7 ~+ f* k! oto go6 A1 `3 Y+ C0 b" R8 I( ?* y9 Q
move-turtles6 ]7 k; `; w8 Z! d* q# b9 @4 c t
eat-grass
, n( q6 `* u+ w" S% f# M: A" ? reproduce
; ?$ p, A" ^! U check-death2 q# r: B! x2 h
regrow-grass* A( x1 }2 W e4 P/ i7 l6 ^
do-plots
+ ^. ?" z' I8 |: _7 ?" O. jend
0 [1 _/ a4 ~# Tto move-turtles5 d) c- V7 I9 _% g" s! ^
ask turtles [7 {7 h8 J8 {1 e/ x7 j
right random 3602 k, B+ T6 R8 _
forward 1
3 }5 q9 E% Q. K T ~+ N set energy energy - 1, o3 O# h* i1 V
]
: b6 t+ d* c( ?" Y/ b9 B# kend' _! p; [$ K# N5 {: M/ A/ c) A
to setup-patches
. X7 s- H( A8 w/ K0 s' K) { ask patches [ set pcolor green ]2 W3 E1 a/ H7 _
end
1 I) ]( e5 d% \) ]to setup-turtles
9 v& K! K2 ?/ \" f create-turtles 100
# D" w5 I! |% j6 C1 L( g, ] ask turtles [ setxy random-xcor random-ycor ]
% h% t! c- s4 c- a, p. @( A/ Send2 X2 E$ _& J% i' e8 G' e$ N6 Q
to eat-grass( |2 ~2 V2 ^% c
ask turtles [
8 W, y3 p( D) D' B( t. G, | if pcolor = green [2 Z1 p. _( T+ Z& V% j: v( ^8 {3 g
set pcolor black% h& u" W. s. e6 B0 t3 K; V2 o
set energy (energy + 10)
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ifelse show-energy?
/ J. G2 e# Y k ]; S( ?; }0 S [ set label energy ]& t4 ?: t/ @* s5 s
[ set label "" ]
% l: ]/ J. O+ k& c% o0 ^ ]
; V6 @" c6 V& Q" h( o3 Q% G1 Iend
4 V8 s1 W' o9 ^; Nto reproduce! p' i# E* A9 {0 `
ask turtles [
# }6 H. j& b- F if energy > 50 [$ Y% B4 j' H0 @: N
set energy energy - 50
( [2 j5 Q- s( p" J hatch 1 [ set energy 50 ]
8 o2 O; s' D( X! Y; y, t% j ]
- B2 N! g1 S' D; A ]
% h! y" a U; E7 M, d5 Eend
' S; ~5 d# F/ J' m# z4 T& {) f: Xto check-death
! U6 h3 h' g) \% x, R ask turtles [
0 ^8 S$ K! w3 \4 J7 { if energy <= 0 [ die ]7 s5 @5 z2 Z6 x9 h
]
' k! y/ Q0 p; t1 b. z' Cend9 U" [1 F L* Q% c. W: X2 J
to regrow-grass" }# s& \# `3 U {% ~5 }% S
ask patches [) j* B0 A4 X5 f; d, |" Q8 W
if random 100 < 3 [ set pcolor green ]
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end& h$ m7 I% }/ m, j7 d9 ]
to do-plots1 z% ^8 A% _; c9 a5 C( U
set-current-plot "Totals"2 j) f# k6 G8 j) y6 m2 M/ E9 G
set-current-plot-pen "turtles": l) C* i) d0 n! `) I
plot count turtles
F6 }* z5 g9 V" t: u& L$ u set-current-plot-pen "grass"
1 V8 F6 N; r# a( ~+ x* t plot count patches with [pcolor = green]
* U+ v' H( I) V; X$ Vend
8 v% I9 ^3 F' s1 X# I b# P可是运行时提示no such plot: "Totals"; z2 g- n' h' X+ q7 A( w
error while observer running SET-CURRENT-PLOT
- U* r5 o& X9 J called by procedure DO-PLOTS
' [- Z: F6 k# a& w3 b$ R% |* F called by procedure SETUP$ `8 S5 U% k+ M( m" k
called by 按钮 'setup'0 n4 H+ s- h: n, I
求大神解答啊 |