我编的程序如下turtles-own [energy]
4 r3 Z! g; S; ^' G( Uto setup
3 j, U; c8 z) d1 o: Z! e clear-all. Q1 ]$ U m1 u9 |4 R2 _
setup-patches F2 ~9 }4 d+ @% {% }/ D* Q3 u
create-turtles 100
* ~4 O# [6 q* Z7 R- ] do-plots5 E6 ?; H" u q
ask turtles [ setxy random-xcor random-ycor ]
. K4 Z5 f' V3 F/ Y7 H' R9 p$ [4 T, Vend& G8 r4 d5 V' c- X9 K8 J
to go: N! ]- n! \3 T# Z
move-turtles
$ L. E q5 C( ~6 G6 [ eat-grass( S2 Y- N$ j6 C
reproduce
8 ~8 o5 l$ _+ _6 o check-death" ?' s: x7 N( [/ x2 \: I; e
regrow-grass
/ K/ t! y% ]& m" d' Q- f: @0 \8 n' r do-plots
6 {, C' t$ l8 r: }' Mend
/ |# I; B6 N- y/ B$ Eto move-turtles
) \/ a) N% i5 A8 ] ask turtles [
. t5 B2 l& G: a ]) \ right random 360* S4 X6 P) X9 q: u
forward 1
( G0 t: ?- M) i: q# M# L) y set energy energy - 1' ?0 a. v- G3 M& W3 x# X
]
5 N- y- V0 y( Y& n" oend0 h0 N# o& y9 B q& [9 v. h& C
to setup-patches
) t) ]* M9 I9 m- Q5 D5 s5 V& s ask patches [ set pcolor green ]$ K/ i. ?1 K+ {; S* H+ }
end* P7 o9 P- }/ I0 u t6 C; b" ^( [
to setup-turtles
: O8 V& s& |2 ]1 T* U) O create-turtles 100
! M, l; v% ~+ Y# O1 U& j3 e ask turtles [ setxy random-xcor random-ycor ]
$ z3 _1 @" \4 v0 vend
X( a; m x- W; dto eat-grass
; B+ @% v; |) o7 S: F/ V: B; y ask turtles [4 {! h' L* T X, k5 H: J
if pcolor = green [
& N! E& \! q! R/ E1 { set pcolor black, N' V6 f' t) o1 [: R
set energy (energy + 10)6 Q a8 w, V; @* y
]
- O5 o! t+ b- \; M9 U ifelse show-energy?9 G4 w9 I% R0 K
[ set label energy ]
- y( d% [. O+ Y [ set label "" ]
1 o7 @( v: ^1 _ ]
7 t+ F. T; x/ n+ Yend
: n4 G. Z, O( D$ [6 b; Yto reproduce
8 k X7 W6 J- M; c ask turtles [
+ E: j5 `, Q& X; l! j if energy > 50 [1 u0 u: A/ ~; [. E' I1 m
set energy energy - 50
# f/ ^+ k; q: V5 k& O' t/ R4 m hatch 1 [ set energy 50 ]. C6 e. t7 O9 m/ E
]. N( B& `- @8 w# k1 R5 T
]5 S0 J+ j. y# X. j1 m6 U* t: h
end
" R3 h. C2 a% v+ C$ {6 qto check-death2 S8 v0 S/ P* }' c$ q7 t- B- J" n, k
ask turtles [
) r4 o# ?$ C }( k if energy <= 0 [ die ]
1 D7 _( C/ y2 Q% F4 z1 s ]
' [* {3 q& y6 c5 S" w3 ~- fend* o9 B+ d+ m) u. f+ d7 g4 A% q, q" u
to regrow-grass
; r4 K# p* u7 Y+ G+ m1 l( j' n6 f ask patches [
4 D3 B/ @$ Z: y6 G" B if random 100 < 3 [ set pcolor green ]. |. d: H" a# G ?* k; ]) Q/ P
]
7 t+ r# N/ b Q- T( eend
/ Y1 S2 h) \' S' Oto do-plots9 r% e- p2 t- P4 P1 V
set-current-plot "Totals"
1 ^ c l- v2 N8 V# |! F( ^4 B set-current-plot-pen "turtles"
8 t2 U6 t6 J( w' }+ g plot count turtles& J9 C; u2 u0 ~4 e6 k) Z( X
set-current-plot-pen "grass"
8 t7 p9 \& @9 q+ S. V plot count patches with [pcolor = green]
4 d8 x- k% U" h( z7 d+ ?7 [end
1 p- h1 _8 s2 O& w) |4 L可是运行时提示no such plot: "Totals"0 ?; y3 h6 t3 j: B+ `
error while observer running SET-CURRENT-PLOT8 G# D* G2 O- G3 I( i, ?
called by procedure DO-PLOTS( y6 m9 t3 }; A# g, N
called by procedure SETUP3 G3 Y+ _5 l4 `
called by 按钮 'setup'/ O% g! t6 d9 c7 I) }6 p
求大神解答啊 |