我编的程序如下turtles-own [energy]# g: w; \7 L* F
to setup( {6 d" k0 G1 W% i7 T1 q
clear-all+ I& r. @. N5 `3 B
setup-patches, N6 c' x8 d% ?5 `! I; C( U! o
create-turtles 100" O& s d3 [: U$ D, [7 M
do-plots' e8 l6 k# ?. e5 o- n6 k. W
ask turtles [ setxy random-xcor random-ycor ]
2 l1 y4 v- V; l. g0 A9 cend
: `( o* H: ?4 O. t3 rto go
- d# J8 {! m# d9 _/ }: W4 H; M" [( Z move-turtles+ S1 R$ y( f& }' p& {# a& h3 f$ Y
eat-grass
+ @- o# D" o6 i. A" ^ reproduce& m" o7 c! N S- F, @$ C
check-death" o7 J* w" t n6 {# }5 [. C! a
regrow-grass8 S9 Z w- [+ z& _; `
do-plots
3 T8 G" Z; c( Fend y" w& f/ x4 L+ ~# ]0 B8 I; w) x% V
to move-turtles
6 r. u( G, C0 a+ v ask turtles [
0 r( W1 }1 p3 H right random 360
3 k$ I1 R* {; z D0 c forward 1
( {7 [$ |+ Y" ?( `' [* j5 h$ c set energy energy - 1
0 N) K, F5 @- {* g1 X z* k/ ~ ]
& G0 D v$ v" |end
: u+ Q3 w3 I' e! i# x+ i2 bto setup-patches( J$ U/ i2 n* q8 G
ask patches [ set pcolor green ]
$ J6 ]; o. q0 m: e6 nend8 ~& M% e! h6 s ^, B
to setup-turtles
, {5 P5 G u/ B, Q! U H create-turtles 1006 V1 {! d- e1 d% k7 h0 M5 U, q+ i$ _
ask turtles [ setxy random-xcor random-ycor ]
- Z6 R3 {9 ^' F _0 \end! [! U ^8 \/ \& B
to eat-grass
9 X! k) b8 L- U n/ _6 C ask turtles [3 L* a. ]0 V V8 C+ W' t( H; s; }* D m
if pcolor = green [7 r$ R1 U0 r5 ~6 R' b
set pcolor black
3 b% h/ i* k5 e* A6 K2 L! K1 L set energy (energy + 10)( H6 T1 f3 \6 C9 f" I
]
/ l4 I" h/ z7 x) m N2 e$ q ifelse show-energy?
& @! F8 m8 s9 D7 ]$ |& J( w [ set label energy ]
' R5 U( u; ] ~' \& B1 M [ set label "" ]- Z' q* s' g/ ?) B! w8 V+ o
]* [1 |) g$ e6 ]' L% m
end
" [; c! ?2 [; O( D$ z" B9 kto reproduce
7 }% O0 g& `9 a% X# L3 f ask turtles [
5 f- |& }+ p4 _5 A* m; w if energy > 50 [" @/ ~$ b( j2 m2 J8 {) _; n# ]7 W
set energy energy - 503 q. I7 |1 P, L) E
hatch 1 [ set energy 50 ]5 K) [) r2 y$ ^8 N* T
]8 H) ]# U# o$ E2 g5 p9 M9 v0 E: n0 @
]
. h$ C- R% A5 h6 D" K( |+ f B: y* |end
( s1 y; K2 U! n: Y5 u3 uto check-death0 `/ V: a, H2 p2 t$ e d6 l" ^
ask turtles [
& k) [8 H3 G+ d! g' v# J if energy <= 0 [ die ]/ w5 ~* g+ ~9 f8 p& n0 j
]
a/ O; p9 X2 X6 `! @- mend: E7 K0 O7 t1 r( Z. D, |
to regrow-grass6 P$ F% }/ U5 C b" F! \' e
ask patches [' y+ l$ D) u4 S$ d
if random 100 < 3 [ set pcolor green ]+ n2 ~/ f) m0 T$ o
]
% g. E. m, j* l7 E% d: h9 pend8 r8 o1 l7 I2 X' t4 e
to do-plots
$ D4 s3 z8 e% T2 R5 K) C set-current-plot "Totals"/ T" _( @/ z( K% K; g
set-current-plot-pen "turtles"3 b# O. u5 g' M
plot count turtles
! O" y* g- Q$ k# w6 g) m( ` set-current-plot-pen "grass"
1 H0 `: p) U2 x plot count patches with [pcolor = green]! W0 W) I6 }" B. `# K" l1 K' c
end
0 f/ K! I& y' o可是运行时提示no such plot: "Totals"
& F' a. m% [( `3 X0 U6 l7 Berror while observer running SET-CURRENT-PLOT" v: v# r6 F z, k
called by procedure DO-PLOTS
' Z0 r- m4 u( P5 w! k0 H/ `: N, U called by procedure SETUP
- _5 f( [7 S% b* G called by 按钮 'setup'
; M9 Z1 [+ u, R求大神解答啊 |