我编的程序如下turtles-own [energy]
- N9 t4 n9 z$ ?9 Uto setup( o! {' j$ W* O! n# a$ m. C
clear-all
4 |, S- M1 r. G" m' U- _+ X setup-patches
! c7 Z2 H, h& [0 V! B; w create-turtles 100
3 {5 u$ f. }' D1 g+ L& P; l% s8 e do-plots
' c2 s+ c7 x4 L3 Q ask turtles [ setxy random-xcor random-ycor ]
8 o( T( l# }2 P9 F+ iend* ` z$ O0 v$ }& X* l* A4 v& {6 ?3 K
to go
& Q1 b9 v. A6 |0 K" d# V6 d( O move-turtles3 d9 V6 Q' Z& u/ V6 q1 E4 L: b& |
eat-grass
P3 G3 a. S& g9 t7 k reproduce
7 ]( z _ T4 H* e3 w6 c check-death3 n% D9 w5 M F; t1 b
regrow-grass7 K# X3 @, h3 h" T4 o' Q
do-plots8 {: S: A5 x l' h4 K* }6 m
end/ Y3 L7 A4 Y, c, a
to move-turtles
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right random 360
^$ A4 q" E" s) R. O! X, m forward 1
2 k: x9 D Q& a) v9 G set energy energy - 1
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to setup-patches/ D1 b" L4 u' m+ P1 X3 Y9 t9 O& r
ask patches [ set pcolor green ]
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to setup-turtles
i% k# t f- I3 Z: p) F+ g create-turtles 1005 R' x: h. f9 P' D: e( j
ask turtles [ setxy random-xcor random-ycor ]
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to eat-grass- I0 X. m2 C3 d6 l9 D3 Z$ e7 {! f
ask turtles [ R J$ N7 ?; f7 F. w7 n6 f
if pcolor = green [- y2 M& I' F* c8 |$ v+ |/ j# x
set pcolor black/ e) [& [" X: m V9 C
set energy (energy + 10)7 A) M9 |; B2 h; Q
]+ A+ T$ r8 ~* [% b; _# m
ifelse show-energy?. G4 P2 @7 P1 E1 l5 U5 t
[ set label energy ]$ b1 U: x4 x9 u( g* ^) J# o8 u$ J
[ set label "" ]8 ~( B; |: ^7 O
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end4 l8 Y9 G5 {# a$ M' p. J
to reproduce
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1 B; I2 \: R1 @0 k# Y" x" w/ J if energy > 50 [ i, u; a" r% @- V% F& S1 i( n! E; M
set energy energy - 50
4 {+ V: v7 F; { hatch 1 [ set energy 50 ]
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- A* q7 R" l" _* Vend
+ ^! T+ y+ T$ K( V9 G' Yto check-death- Y1 K' ^# L) ?! o) O9 d
ask turtles [0 K d1 D! \; a' y+ H
if energy <= 0 [ die ]7 e/ ~( o/ F* k7 [
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end
% ^6 Y' W& b) O4 j5 v" K4 E, ito regrow-grass
8 ^8 H& r1 e! c3 [' f# F ask patches [, }& x8 R! [2 n/ y1 u( f
if random 100 < 3 [ set pcolor green ]
2 E1 b8 B/ H) Z/ @ ]
! C: L) l; v+ w+ V# w' _end
/ l% N7 V& r1 d" }8 k6 dto do-plots( u* g) f6 N8 ], l; q& J
set-current-plot "Totals"6 ^7 z* G! [# \! W% ^' _4 c) S
set-current-plot-pen "turtles"7 R4 F# F# s/ u8 K) g) B
plot count turtles8 p. Z0 r0 Y$ w* x1 z5 ~
set-current-plot-pen "grass"& ^7 p* s$ F, R7 n7 m
plot count patches with [pcolor = green]
4 l9 k5 S4 J% ]! j9 h6 g. uend
0 i2 e4 f; |1 q/ F% M: I可是运行时提示no such plot: "Totals"
8 w6 ^5 S( O9 J+ d5 h3 b. Yerror while observer running SET-CURRENT-PLOT4 g, ^+ M1 k8 P) Z, I' F$ A* f* i
called by procedure DO-PLOTS7 A# ~. u/ y7 h8 s! ]
called by procedure SETUP- g4 W$ o. R5 L$ A
called by 按钮 'setup'
" V2 k; f O% y9 o# t3 T求大神解答啊 |