我编的程序如下turtles-own [energy]" i* u4 m; N4 S& U
to setup, x% Z& S' c+ T5 k& U
clear-all w, @) [8 W8 b
setup-patches% o. I9 D" d& t
create-turtles 100# d; k! m3 |6 K7 |
do-plots. A, {) x l1 l- Q
ask turtles [ setxy random-xcor random-ycor ]
`' m& _; D7 `; n9 @& D5 u/ ~9 Jend
/ f% p( @1 B! ]1 h9 s! Ato go R% U+ [" j" Y
move-turtles
* S! b0 U2 c) `1 Q+ x+ v eat-grass
: Z0 L! P2 `/ O4 l reproduce
* o8 Y. D- G! ^ check-death
' M! I( G" v; A/ }2 I regrow-grass
" {7 r" u, Z2 L do-plots
H) x5 N0 L+ c, W7 u- _end
0 r6 M+ k2 J+ }0 p( Yto move-turtles
1 {& @9 m3 T5 o6 X7 \ ask turtles [
, e- a z9 Z( X i/ V( | right random 360
% F3 N5 q" w# X: D% l6 F forward 1: e. D. `* z" q$ k I4 E
set energy energy - 1
4 ?( E: F. S# E) c8 ~8 G ]( Q, @- e2 Q& a2 F
end) E/ Q) a1 h! |/ B) k) j! w5 A
to setup-patches" R4 t5 X: @1 ~6 H) T6 w
ask patches [ set pcolor green ]& g8 @2 W) C4 q7 Q% r7 E+ }
end8 j0 D2 L5 ~8 o; u' g0 w, f
to setup-turtles/ K4 R; S8 k/ B# u8 E# i, ?; M
create-turtles 100
8 m% `/ j* \2 L; U9 q, V3 ]5 I- H ask turtles [ setxy random-xcor random-ycor ]
* c: ]; v8 b, T9 m- A) l7 jend
3 y% X& U/ t" F" w3 u/ Fto eat-grass
/ X$ l5 f" `. g m$ S, o ask turtles [
L/ o* M, P! U4 L if pcolor = green [
3 n+ `/ K% J/ ? set pcolor black+ p$ M, e# r# S% B. ~
set energy (energy + 10)
2 Q% A2 e6 ~# F; T' j ]! J1 j+ o6 i1 U+ z
ifelse show-energy?
$ C6 d5 j* @$ Y% \ [ set label energy ]8 v! \2 P: K! f& r8 I7 F$ u/ R
[ set label "" ]
+ B2 s; O9 P( c* \ ], ]* b3 X9 t; } o o0 V
end
+ [( S( r, b+ L9 x: Eto reproduce
9 Q, p# _( h! _# n8 |4 c: j) Q ask turtles [
3 e* c" `4 N# B2 \- M) {. U if energy > 50 [- T4 u2 {% S# q7 E( r4 p8 c
set energy energy - 50
" K$ y; l* N e. @' i5 m$ Y hatch 1 [ set energy 50 ]0 u c" b1 d+ [9 `
]
$ G% }$ z4 X# A8 {# i ]
o# H3 T3 g. Y. Y) g5 Qend8 f- _2 a; C# ]3 P
to check-death4 @6 ~4 N. t* S, ]% W/ r
ask turtles [% n/ o* C% Q$ ] V" R
if energy <= 0 [ die ]" w) j7 ?1 |2 u$ C7 L" I
]% j& P1 P0 ?, N& w8 J; [4 q* {
end
/ S- a0 N6 `6 L }) b; [to regrow-grass
% H$ g$ Z% y' Z ask patches [' I! U2 y' s+ N* K! _2 k2 X
if random 100 < 3 [ set pcolor green ]9 U+ d u# s9 z
]
- j' H' ^; l0 e+ Z, vend" U4 F" U. w' G# E) F+ q
to do-plots+ ~( ~! {& s5 x: O6 o" f1 d& X3 W W4 q
set-current-plot "Totals"$ H( @1 b+ Z6 t! w
set-current-plot-pen "turtles"( q: u- G6 m4 E( L# G+ X2 e; r" C
plot count turtles
4 K D* H/ H+ r& ]) u L. a set-current-plot-pen "grass"& J9 e$ B) {' m* T; X
plot count patches with [pcolor = green]
, r6 O0 \2 T2 w9 k7 {' ?end
3 O. Y- `7 M. o% I2 c1 q0 H( V可是运行时提示no such plot: "Totals"
8 a" d- Q% K" }, xerror while observer running SET-CURRENT-PLOT
+ S, q( [$ ?: k5 x/ J9 x called by procedure DO-PLOTS
4 d) i4 B: e+ R called by procedure SETUP
$ Z4 W, O% {1 l6 d* o! T4 E called by 按钮 'setup'
( p A& U* w. G, _/ o: V& |7 n; M求大神解答啊 |