我编的程序如下turtles-own [energy]
) u8 D! m y9 G9 k X: }to setup
* q5 ]6 s: _: ~; |! _* T A; i2 O) L clear-all+ C& F/ I4 g* M
setup-patches) ^$ ~( U4 O$ @$ M
create-turtles 100
7 G4 o5 i+ J* D" f do-plots7 M: S; U, I7 Y5 P9 h" f
ask turtles [ setxy random-xcor random-ycor ]
' [0 ]1 G. X0 S; f1 Kend
" j- l P* ]$ y8 x* r& B+ F, kto go
: o9 o* C* @1 R& @! ~/ f. L move-turtles3 W& h Y. q; j+ U$ l
eat-grass/ [/ K0 H+ L; m
reproduce5 ^, k; A1 \$ F# c
check-death
. M. K( R4 F |3 E v& q$ ^/ J regrow-grass
( C/ E% C) |0 i* i do-plots
" a5 z# D# \: ?0 ]" lend0 S# F. }( g' v' [. J0 P6 W: `7 L* w& w
to move-turtles
2 ?; }3 s" Q7 k2 D) Z, B ask turtles [! W4 D6 h& g) x9 ~) \, s) I
right random 3603 T* q0 R! D! \# m& t
forward 1; m3 b5 W8 f7 N% Q
set energy energy - 1
& [. R. i Y3 k7 S) h6 J: l ]0 y" t$ f& F" B }
end9 B# l4 R1 j, P; ^" A- }' F
to setup-patches/ {' ?& D+ |) v! j
ask patches [ set pcolor green ]0 z# n4 O6 b( W1 s e r; D* F
end1 f8 K0 n4 S) Q: o
to setup-turtles) h9 [. |8 I# K3 X0 b' U
create-turtles 100) y" H. _: o0 _7 z0 }
ask turtles [ setxy random-xcor random-ycor ]
: d& O, r7 Q6 _6 j% n4 aend
& C* c/ @- _$ P: h2 zto eat-grass$ L* O( X: M/ ?- @- c; }. w; ]
ask turtles [
2 ]8 m5 z8 c' r; b3 Z5 |# ]) k if pcolor = green [* Z8 D4 E, z" V" k/ U
set pcolor black
9 e( S* Q5 N9 D5 `3 g+ _0 I set energy (energy + 10)
9 K9 z5 N' K! I2 b6 b# j ]5 V2 D0 M, u$ {; f b
ifelse show-energy?4 J3 J3 s6 ^; T5 |$ t+ {
[ set label energy ]
. {# ?5 R6 X/ A8 d) R/ O [ set label "" ]
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end
% s1 W5 \* s+ A8 p0 fto reproduce
7 z& P! Y' q7 s# }" n/ q ask turtles [: M! `: m3 O7 L
if energy > 50 [5 I& B6 ]) h+ H: ^
set energy energy - 50% e6 i$ ?0 Z7 F" r! Y# ?
hatch 1 [ set energy 50 ]) G- _2 u5 j1 l6 y/ W6 w2 P
]2 s% A( e" y( T3 L M8 N6 _, j
]
8 l5 B l( x! T& M+ K9 U: Nend1 }& m6 M+ L! j
to check-death4 c% y6 Q* L" l8 R1 f |
ask turtles [) r/ |6 d7 |8 r& V2 a$ U1 m) f
if energy <= 0 [ die ]4 A1 q1 I0 B# N$ W K* R7 U* j
]- G; i1 V1 t9 }) o
end- Z2 q9 N4 w5 r9 x) d! _2 U
to regrow-grass
4 S% ]9 N( T& _2 v! j; @ ask patches [
) a2 A4 n2 d4 J1 K8 v0 \# W if random 100 < 3 [ set pcolor green ]+ z* {& s' s, n
]
3 R; \$ m; c+ c# h g. p5 eend
2 l8 @# d, k; ^5 X j9 ]' i' Rto do-plots- B) [3 W1 N, i: J) Z9 {
set-current-plot "Totals"
6 A) e& ]) ?* L7 q0 P0 d# @) Y( j set-current-plot-pen "turtles"
( f4 o0 B: Z; J3 n1 m plot count turtles
h: p8 `; b9 [6 z set-current-plot-pen "grass"
* _/ ]7 h$ @' b& ]. P) R q plot count patches with [pcolor = green]
p) f( x" F7 L0 |# {end& Y+ d. {# V0 V' ?% k
可是运行时提示no such plot: "Totals"
& M9 m; X4 H `* f+ [9 E$ Merror while observer running SET-CURRENT-PLOT
9 M$ q+ Z4 W' [! o) I' b! d$ n called by procedure DO-PLOTS
5 z8 X9 j9 f8 h( V' g7 O, x. F called by procedure SETUP) C) Y+ k: }+ W, y9 n
called by 按钮 'setup'
' q7 y2 Q' b2 |3 b! f/ a求大神解答啊 |