我编的程序如下turtles-own [energy]
* f: M% Z+ B3 F7 j8 e7 W8 vto setup
0 M; c( |) @8 |* u! ^* U5 Z8 j1 X clear-all2 m+ V! K/ S2 y& _. ~! V3 i9 N! [5 g
setup-patches n# W. e: b7 [6 G" D
create-turtles 100
4 {. z* H- [5 f do-plots
7 Y) q5 ]7 c0 K5 i ask turtles [ setxy random-xcor random-ycor ]
2 l5 v O1 C- C8 ^' kend
" s& Y9 M; [6 s8 Z% j# Ito go
, G# I1 x$ x) R2 W move-turtles. a2 b; b- b& p; ` Z4 F$ ^
eat-grass) K; i# x( I+ q* B+ ~
reproduce4 m2 u! a2 P K4 o! a- V% \
check-death$ K3 E6 F; s% F7 G1 Q9 n2 \6 t
regrow-grass
, ?3 h" @! Q X8 a# j do-plots
* t8 m% D' A: D; ?$ i2 send
1 B& K! B/ Z7 T, `7 e8 b W6 Kto move-turtles
' [* z8 R9 h) H% v/ }" D$ f ask turtles [5 P) W Y2 f3 c5 D% [0 E0 [
right random 360
/ m. A4 t2 [. r# T! C; ? forward 1
6 k1 O# u/ N' Q1 d set energy energy - 1
9 C5 `% X' w2 X9 u* {7 P ]) A& M; x7 I+ R x$ }
end
8 x D$ a, I Z& `- X! Kto setup-patches
: ]7 z; ~6 {2 k! w0 j ask patches [ set pcolor green ]
5 P1 x# F9 C( k; R. J8 gend
8 A; O, _$ E. V4 V& jto setup-turtles
/ s3 v9 f# a9 g3 W: e create-turtles 100+ J. I6 G; h( [9 {
ask turtles [ setxy random-xcor random-ycor ]
1 Q" F" ~( p! J3 @3 I+ Q$ u+ Pend S# D: X3 y4 z l
to eat-grass
) v, u" r! {, A; A* c. ~ ask turtles [( U$ f' M# Q/ A& [2 @$ c
if pcolor = green [9 D2 s& F# @. Z9 g6 r0 o
set pcolor black% `+ r3 Z# W! ~$ r% \; t9 y5 }
set energy (energy + 10)
8 l5 O, V; Q1 y! b5 _/ y ]4 Y7 X2 \: n: j
ifelse show-energy?
: z3 J* u3 L5 B. E0 ^' g4 z9 O [ set label energy ]
& C _% F8 C4 D0 o( o8 C3 ]; F5 i [ set label "" ]
6 B A a9 B' ^" k/ J! w( D; g ]* y: n! u& d# j; b5 G( `- ^: D
end
; u/ |- T( h8 d" K# y5 L/ gto reproduce$ \& k* C3 T" o/ {7 v f- P) I
ask turtles [
7 e+ X# h( d8 f A$ p if energy > 50 [
. Z+ J! B! r9 N& E$ e set energy energy - 50: t N9 G' n% p7 U6 u
hatch 1 [ set energy 50 ]
2 D# X2 O: L' J3 k; M3 _/ w2 h ]
5 A }$ ~9 r; s( _ ]- I. q0 A6 W. p
end
. `) V1 F. y( S& @. Gto check-death, J+ f/ N! Z% X2 O. G0 F* d- c g7 v
ask turtles [, k5 ^" ]7 h( x5 e5 b: A5 E
if energy <= 0 [ die ]- w" M' h% L6 g8 ?& e5 r% R
]
9 z+ L' c- s1 |% f5 U* [1 v; qend' U; w7 d+ P* s& ] B+ K1 P2 _
to regrow-grass
( x3 M4 j( e' x. G ask patches [7 a: c9 H# [( f$ I6 V' k
if random 100 < 3 [ set pcolor green ]6 y6 n5 B M$ Y7 L+ p! _( T/ K
]
8 `" |) F; D5 ^2 ~0 {7 y) | gend
1 w% C1 j+ v) Lto do-plots
6 a) H9 |" m, F% n X0 B! G" V set-current-plot "Totals"
6 B3 T8 a/ Q) r& Q+ I" k set-current-plot-pen "turtles"
* W) G& v! f7 C. W plot count turtles
: }) e2 y g7 t, I' t) i3 o! X set-current-plot-pen "grass"8 p1 p! N: d, v* }3 O' f& j) Y
plot count patches with [pcolor = green]
! h- G4 V& P3 R4 I- {0 fend2 d" |" J0 }6 Q- W& y6 M
可是运行时提示no such plot: "Totals"
$ o: o2 }4 O9 I* ]4 Y! Kerror while observer running SET-CURRENT-PLOT
% ^. z8 I8 ]+ Y, `* W5 ^) R4 w; X called by procedure DO-PLOTS
- J% E( q" a2 [% |5 \2 j called by procedure SETUP7 ?) R- x' I# b) g3 n) C0 G
called by 按钮 'setup'! Q2 Z9 f9 j- {! M
求大神解答啊 |