我编的程序如下turtles-own [energy]
- @2 ^# u; V& b6 J2 K% C- b5 oto setup, z7 h5 A5 j8 N1 x: {4 A- a
clear-all5 L7 I/ ?$ x( K j
setup-patches
+ b* N$ Z/ `3 \8 a/ o. e5 | create-turtles 1006 K) i. l2 ?& s$ y" G5 v! \
do-plots) p* l2 p: B! D, A( x
ask turtles [ setxy random-xcor random-ycor ]% k- L! ~& @% }' C- `' P
end; m7 c. |1 J w+ D% q0 T9 {6 A
to go, A0 R! ^" n( A' z
move-turtles
! N( s2 ]" A4 h3 c: m% \ eat-grass
$ e, l8 {) e% I9 |" C- D reproduce
- ~, n3 _) y( t check-death" ]7 J, q8 V7 i d1 X3 B6 F: X+ }( x
regrow-grass
4 v. J3 C, k0 v/ U5 U+ z" ^6 | do-plots
$ b1 w+ ^! k: d) ~* Qend
) C" [$ p! s. ?. { O2 }! mto move-turtles, p6 ~# Y+ j: U. h4 m+ n
ask turtles [
. z$ a6 q, `( Y right random 360
( E3 y9 G, e0 s; s! D3 F1 g/ {* i, t% K1 F forward 1. @ _% `2 q% _) x; j: ?+ l" I
set energy energy - 1
& t, H/ u- q; o ]9 u! d; g* I- s0 v" r
end' x N6 d8 m9 m2 ^) g
to setup-patches& ^- L) h; X8 i2 y. X
ask patches [ set pcolor green ]" R- P$ E" { Y- x" Y5 \
end
+ ?( N8 s9 w) y! E! u; l" {to setup-turtles
1 T4 ~3 N, T1 H# s& ~. P create-turtles 1003 p5 O4 M9 r7 z5 @3 n
ask turtles [ setxy random-xcor random-ycor ]9 X) u: H5 `# W: _) h3 Q, v0 w
end0 D6 {- `, _' c7 B+ z9 y! Q
to eat-grass" {7 J+ w L% I6 r6 s$ I
ask turtles [
% O% `, p7 j% ?- |4 P3 _; J# G, c if pcolor = green [
$ o; K1 l' F8 }5 O8 J3 x+ I set pcolor black" J @. E/ ^& A" u- ~
set energy (energy + 10)3 \. G) ?0 Y6 f$ w% S8 z
]" f; @! n3 w( |5 U( @
ifelse show-energy?8 n! w/ W+ l1 N: N1 j
[ set label energy ]: S& t" r; f- O8 p) k( }2 t- b
[ set label "" ]
5 v$ v( z5 q( ~7 C5 e# e ]# b# T6 R0 o9 S! y# }6 g
end0 D1 {( n% v8 F$ L* O
to reproduce K8 D0 ^7 X) u4 Z- @& R- H
ask turtles [" H5 [$ [, B0 N7 z" Q" y* n
if energy > 50 [
$ z4 c p( E# x, _9 L set energy energy - 50* i+ Z- S, b. J8 ~
hatch 1 [ set energy 50 ]
; m+ i* n" ? p6 X ]/ k/ S, y4 S, u
]
' ~1 a c# a" X- z/ J+ s- cend& Q# Z, v, c; Z; i) C) J
to check-death, L' W" u. M; a" `: f: U$ z( r
ask turtles [' f$ |: h8 k }5 W, m0 ?
if energy <= 0 [ die ]' g& S4 O3 S" {6 E7 b
]
5 h* ~- ], h9 V& i& B. S: z8 H+ T- vend) y5 C: @9 Y3 M/ D
to regrow-grass
1 ], n2 l% \+ p+ u5 X4 [% E A ask patches [; A% {. U+ C3 l
if random 100 < 3 [ set pcolor green ]5 Y3 e8 f! V: {
]7 J1 k: m( S3 f( ^% s
end
5 @$ W3 d' ~5 c, h) Lto do-plots
" J! x: T2 x" _9 l1 j3 [( f2 N2 k% p set-current-plot "Totals"% |5 r1 ]( ?7 ]! L8 @
set-current-plot-pen "turtles"1 f) P8 E8 o( q; E3 h' w
plot count turtles
' m, F! b1 W' p set-current-plot-pen "grass"; T7 S# A+ ^. o. i6 H. ^1 V7 \
plot count patches with [pcolor = green]3 ]1 m# n$ [. h8 ~
end
; D3 \& [- K, Y+ Y2 s可是运行时提示no such plot: "Totals"& z! o+ i* [/ u: x( M) G7 _
error while observer running SET-CURRENT-PLOT% R) c" V0 ~* }! P; \/ q
called by procedure DO-PLOTS5 L$ B; S! |$ m) S8 H$ I2 E
called by procedure SETUP; ^# \" X6 E3 R g& w$ y* E4 b
called by 按钮 'setup'2 @$ z+ z" N, @- b& }* z) u
求大神解答啊 |