我编的程序如下turtles-own [energy]
$ \) q( Q" R0 b! c Y m* Lto setup3 P9 R: z( x; u1 @! p2 F, G: G
clear-all( v4 J! M* _) C# W' D1 C
setup-patches* f) g7 A3 p' e4 O) V
create-turtles 100
* I* C3 k: o; H) X% U do-plots. m$ P3 o* r" R8 J# M- L
ask turtles [ setxy random-xcor random-ycor ]2 _$ D5 g* @- f: H
end M9 K6 O7 G' S# ^$ @
to go7 }5 b) _1 L/ n# n
move-turtles
2 |: L- K; O; P9 ^( F5 L" b, \ k; O eat-grass
% G) i: V/ _( p. \5 U0 X0 ~+ ^ reproduce
3 y- J- N1 b, d! g& j check-death
# V- }& [+ A+ I( \% H# A regrow-grass
( U8 T3 @( `$ Z8 \. k; X do-plots1 \# z, ]& D$ X, l: M# N! x
end
: u9 a0 s8 {9 _7 Hto move-turtles o, y6 W/ N; X# |" M' V
ask turtles [2 T/ E! r1 }: M! t
right random 360
; o" r+ L, v% ? forward 1' C C% O7 X8 R& c7 c. N7 F
set energy energy - 17 O. a0 z+ ]$ Z" _3 O, N
]1 I, P3 D$ x* }* g, b
end) \9 X7 U( Q+ s
to setup-patches
$ q6 U4 M2 n5 C1 e! s. M7 C ask patches [ set pcolor green ]
/ d. L: ^, b+ v! |, v3 Jend
% L# q: Q1 Y* y8 \/ [) r q; Hto setup-turtles
4 a$ K% K+ y4 \" I8 I% Q! k% Y create-turtles 1001 g' r2 `( ` {2 J& O
ask turtles [ setxy random-xcor random-ycor ]
- x" t9 U3 Y ~7 s% q1 zend
; \) n; U* W3 X" mto eat-grass' p+ O3 U1 U# X+ z
ask turtles [# ] o' y9 ~% z @* z8 ^
if pcolor = green [4 c9 ^* D5 O/ P
set pcolor black- o H! m- t6 T) r$ S
set energy (energy + 10)$ x/ J# t# r8 H( M3 N/ R
]; W' h' B" h" U- x
ifelse show-energy?3 S1 \5 r5 V" [8 u- T$ f, g& p
[ set label energy ]$ P2 I! s! {$ y0 t5 K
[ set label "" ]
7 G& q3 z, W3 y7 D- m% t ]
* q* Q( `- A* P+ gend5 S& k) i T* `$ n
to reproduce
# y& i: z4 v. n6 O4 i ask turtles [
, W4 h. g; X$ J9 O) X. O if energy > 50 [' H) _6 }8 i0 B
set energy energy - 50
( b J( O/ ?9 L! l; h hatch 1 [ set energy 50 ]/ A2 P, \* N# [0 N9 y( c
]
3 \$ k% h+ G2 _. y9 p( d ]
2 W0 \5 `1 h- w) iend7 y) g) O n1 a) F" |: A
to check-death
' i' x. k- R) j" A" _2 W- I5 A ask turtles [3 @* e8 m# G* H
if energy <= 0 [ die ]
" Y _! Z N6 \* F. i2 X3 x* i ]9 [6 F" c8 i! _. p- M
end
' N% U8 C. A) x' }6 rto regrow-grass
9 W5 t6 M* _5 \# B ask patches [
4 N; J, G! R( d+ | if random 100 < 3 [ set pcolor green ]
& x F, G) I) e7 u2 s# S1 } ]
1 D/ u' n; V; w, cend
5 T4 a. m$ i3 I% B$ ]9 Wto do-plots
$ T* x$ V+ N9 k6 l1 o# ^+ Q set-current-plot "Totals"8 m: ?5 ]! W9 n) b2 K, h! B g! G
set-current-plot-pen "turtles"* V6 O$ J5 Q" N/ J' g5 j
plot count turtles
2 I8 s8 P7 h. y( j2 f: J) N6 u* D set-current-plot-pen "grass"
3 [- U4 c' _ ^ E$ H _1 J plot count patches with [pcolor = green]
% e' P9 z) \0 m9 Mend
2 P) g v3 f6 V可是运行时提示no such plot: "Totals") u1 `7 g% t1 }0 Z
error while observer running SET-CURRENT-PLOT6 T/ R; K* P0 l$ u, m. }
called by procedure DO-PLOTS
8 | P9 w3 D; `2 m, Z, d called by procedure SETUP
. _( |( v) I" H! ?8 B4 I called by 按钮 'setup'
( D+ Q/ p2 W0 h8 c求大神解答啊 |