我编的程序如下turtles-own [energy]
' e! t. a* @) j9 Q4 W' Gto setup
* |1 w! R& K9 u clear-all2 z- ~* G0 b+ F3 v. P. D
setup-patches
8 `2 d/ @ ^3 t5 `9 |4 w8 o create-turtles 100
8 t$ x7 J+ K7 x! N T1 m do-plots
* e ?4 d# D( i+ t& i8 a8 X" p ask turtles [ setxy random-xcor random-ycor ]6 U a* G" e3 _0 p
end
4 {# F* W; u- ^7 k4 \- X5 Q# Mto go* m/ g6 b" h, D4 E9 e* I% e7 Z8 W
move-turtles" n. k6 l9 c3 u* F) x
eat-grass5 t' |2 \% g% a5 I; K, [' i
reproduce
E6 p/ `, z4 N* E7 a o check-death) t R$ v& @ _' ]# x9 A& Q8 |
regrow-grass0 _6 N' p0 _4 E8 r6 X/ m6 {
do-plots! }6 H! |7 a6 A( B
end* E$ [2 B1 Z' p4 n1 Y- [' M
to move-turtles
- Q" ]% _3 R4 {( y! Q ask turtles [4 {# J; w# F- A d" a! |' c! b
right random 360( `" Z: ?% m y( i. b+ t" f( }
forward 12 c" A/ g3 u: W: K4 H
set energy energy - 1
% U) ^! c7 B9 H' Q: v ]( l# [5 h2 E- F7 [1 z: M/ w
end
L2 X. N/ `/ g3 `8 U1 a9 l( Lto setup-patches
O W+ x. i" Y ask patches [ set pcolor green ]
1 [4 x5 w! M2 [9 v/ e% i; mend& A% Y. _ q5 \: u; H; S
to setup-turtles" S+ ^( G+ i! x; K
create-turtles 100. ~6 X# C- L# f
ask turtles [ setxy random-xcor random-ycor ]
* @. ?8 \0 g( H" Dend
8 h$ j* V* `6 {% u% a4 \. J4 \to eat-grass, Z$ K2 e# ~ o" C
ask turtles [
# L* I; X4 a9 z, g0 V4 P4 ?# F O if pcolor = green [
?+ w0 J9 c: @ set pcolor black" Y4 G* b2 q. G: A5 [6 y; j( O" G' a5 ^
set energy (energy + 10)
4 m5 h$ ^8 N) a2 G+ y( ] ]
2 V! r% ?8 r/ B8 ^0 S6 d ifelse show-energy?" d) `- h8 }/ }6 E' Q7 Z! N
[ set label energy ]5 D! x% h8 i5 M$ G. a9 h: F( }
[ set label "" ]
- K/ G+ o8 W) j# P ]
/ Q* B* A6 X5 z9 j& Dend
) S: _% K e+ a, n3 Q5 Qto reproduce: W; O9 |0 ]2 O8 r+ t& W) t
ask turtles [
5 a t+ i0 T {5 |( R if energy > 50 [4 B" h% x# e$ M7 `* f3 f8 Y* w
set energy energy - 50
+ j( L- F! _+ {: R, O3 s hatch 1 [ set energy 50 ]
3 y6 R, L/ o7 W6 }+ f ]
6 n' Q0 J' o/ v, ?& ? ]+ {; t( M1 E- j4 P ^! W
end
. [* y3 E$ V* G, Jto check-death8 `8 g$ q: d9 L* ~2 @' `
ask turtles [
# [1 r6 |3 D7 E4 s1 x: | if energy <= 0 [ die ]
9 L. e+ Q7 B7 N9 B ]6 K. N% H r+ u1 c- m
end
5 A* J+ D4 {, X$ Y! z& X1 }& dto regrow-grass/ t% P% A" F2 n' L0 C& A
ask patches [2 B: \. K7 B, ?) Y
if random 100 < 3 [ set pcolor green ]/ T3 ^9 }( H" G2 j& \/ T+ K
]
% e5 k( |6 q p A% Rend, a5 Q2 G5 B, c# G7 t5 n* S# n
to do-plots4 K9 p- D$ Q, { l
set-current-plot "Totals"/ ` L0 S8 Y1 _# z
set-current-plot-pen "turtles"
3 R0 n4 c( s, J" ~ plot count turtles
# f2 K: ^3 j3 o. Z' P2 `8 N set-current-plot-pen "grass"
5 I3 A3 g1 m1 |+ e$ @ plot count patches with [pcolor = green]# n7 N) P% B1 J3 {7 o' Y: W
end% H/ g1 D$ N6 o! P' T, @5 I7 S
可是运行时提示no such plot: "Totals"
: g+ ?1 w8 a ?. |; perror while observer running SET-CURRENT-PLOT0 r2 L9 N5 `2 h% T/ y5 u: L6 I' k' |
called by procedure DO-PLOTS8 R- d7 @# g! J0 j2 V- q
called by procedure SETUP
3 `% L, k" j- C6 i9 C+ Y called by 按钮 'setup'3 G" ?5 ~' K$ I/ h: g- X& P
求大神解答啊 |