我编的程序如下turtles-own [energy]
) _, W7 Z7 c0 I: r7 Z, E# F9 }( @to setup$ i- J( l8 D: u! x# C8 ?% t
clear-all) p2 }4 u+ y* j* d; O: G% @4 i1 f
setup-patches7 T$ e ~$ ^7 L! d" ?" i
create-turtles 100
2 n% e& e- }$ _: f do-plots1 T' c* @- e* c0 M0 O6 W o
ask turtles [ setxy random-xcor random-ycor ]
/ y/ e [! [7 [end) Z* ]- E8 D1 @2 R. b. a
to go
' c- z' E5 B5 c* s6 D! u3 P move-turtles
$ u8 M; ]; f2 g eat-grass
! P: I! R* z9 B: n7 s4 P b5 B reproduce7 b5 x, B, j, z9 b0 M
check-death
2 v' h |8 Y' d$ R1 q3 Y9 j regrow-grass0 p7 ^0 b0 ~0 P( N7 M1 A. B4 \! _
do-plots* r- P. y) ~" b( Z; x& D
end% g& n; v: a6 ? R4 Y
to move-turtles
: i4 ~" F4 l" a7 F2 h ask turtles [
F r1 g, W' R7 W9 ?/ F, J right random 3607 @; _& z' o- t0 j1 s
forward 1
# f8 D7 c, K. h" P9 m2 u+ @( [ set energy energy - 1
; ]3 U% }* g {' z, [6 ~ ]
6 G0 o; q _! @9 R! Zend
( u# r% l$ J) cto setup-patches' _' K& w# c. t& A" [
ask patches [ set pcolor green ]
& U, |* N% Y; r, |4 E5 Tend+ W: f( u6 I1 _7 v2 v% X
to setup-turtles
8 D6 B! w% C) h _7 }' B create-turtles 100
1 f/ z- W' b% k, J$ @ ask turtles [ setxy random-xcor random-ycor ]2 U' B) e! d1 ?4 k8 i' [ n1 O
end
4 w$ ^) s/ z7 B" f$ T' e* C8 D: vto eat-grass7 j% c6 U: b+ z" M8 ]* X5 K/ L
ask turtles [
) Z$ f6 ^# @3 v# M+ W if pcolor = green [* u; z( J$ ?$ P+ P0 |- G5 J
set pcolor black
/ S! W- x" L$ C! x [/ H2 T set energy (energy + 10)
! f7 ~4 X9 P9 }# o" t' k) ` ]
3 Z/ }/ r6 g, W+ R5 _. K( O ifelse show-energy?3 U0 o4 n3 e2 e5 F' Z/ C7 z" {
[ set label energy ]! o8 K7 T: w0 S! d5 t
[ set label "" ]) m" H; b' o. }* x7 T, {
]0 n" T( j4 H1 J$ Z% j
end
% z) e( Q8 E0 b- y- xto reproduce
) E$ R" T/ N0 \ ask turtles [
& |3 A5 y6 R( c4 x/ P | if energy > 50 [7 |4 a& `' }( O# m4 Y! ]% {3 T3 Z
set energy energy - 50
3 n; t9 [6 P+ I2 B# g1 [ hatch 1 [ set energy 50 ]# K7 C/ H! D& J
]
) h5 P+ j: ?, V3 i# D z ]- U7 v5 [, i% q5 G
end
. p4 U: s1 g: s7 Dto check-death* \0 _/ m2 ?) i" [, {- m
ask turtles [
) f5 B; D% t; y if energy <= 0 [ die ]5 O" ?/ w& p# ]+ o( D
]
8 v: C- n$ U) g/ B+ jend
# j ~+ {( J8 y+ n2 tto regrow-grass, z6 y. y4 P/ r5 I1 M
ask patches [9 n/ Z) B- c' ~
if random 100 < 3 [ set pcolor green ]+ X5 I' G+ Q% W% b" Y
]
9 f( [; v4 Y; v9 pend2 M) | v) a: Q" g0 K
to do-plots
9 Q4 a% q+ d2 q O set-current-plot "Totals"
: ]# m& `5 u% F set-current-plot-pen "turtles", V2 i6 p' s3 ~0 w( O* f
plot count turtles
& A' H. J% q4 {5 `' o- I set-current-plot-pen "grass"
9 D$ }/ O" \. E5 V } plot count patches with [pcolor = green]( I! o/ S: h/ u& m8 D
end# f" G* R0 G: y* \+ {
可是运行时提示no such plot: "Totals". w/ l a F9 @7 a6 c: N Z
error while observer running SET-CURRENT-PLOT! A' P! R6 ^* W% V* Q
called by procedure DO-PLOTS% s6 X1 E3 e, H( a! t
called by procedure SETUP3 B @* F2 _ @# [' R
called by 按钮 'setup'
) Y! T, k5 V L# h3 \4 f( Q求大神解答啊 |