我编的程序如下turtles-own [energy]
- e: `4 O% o; M* k' Tto setup
4 }$ p/ t E$ n clear-all9 Z7 o9 r) `: x$ d- ~. ?5 p/ q' W
setup-patches
9 w. N. y5 q% t- d5 w' ? create-turtles 100& K! ~1 t- N1 V+ z3 S" f$ n
do-plots: F: S& K9 F. k' r& G* L
ask turtles [ setxy random-xcor random-ycor ]9 G& ?. O8 N* v0 Y k$ B
end4 A% ~* v6 t4 G4 ~4 r. I. u
to go
- \9 Y9 @( l" b( P! |& h1 Y move-turtles. F6 o7 c- X {" o1 H" u
eat-grass) b- T. _; Y G2 m) E" g
reproduce2 y z9 n7 {- g
check-death
0 p$ y* I, e; X regrow-grass
' Y) \. G) f7 `* H- b5 n3 ? do-plots
" C/ ~' s! F; ?0 ~: Gend
1 H$ I9 @8 `) D3 [ u P9 `' j# Z/ j) hto move-turtles+ w8 y/ h. s/ {/ [* n
ask turtles [4 _; u) V: M# u/ K0 f# P2 ^8 C9 y
right random 3605 }2 E( h: N( p# h# Q1 |
forward 16 U+ I! h3 W5 F' K" r# b
set energy energy - 1
% d( k! e, ]; k: D$ F6 ? ]
8 O+ {* ~; j5 y" h% ]end6 e% y/ a) p7 m( t. x6 _- C! O
to setup-patches- a/ P" M9 }8 T$ W; ^
ask patches [ set pcolor green ]8 y8 d8 x3 n8 ?$ S% ]7 F
end
' ?- m. Y; |9 z1 oto setup-turtles
, ?5 m# l, f3 Z/ e7 F create-turtles 100
' D5 o2 F: D) i/ t8 n, X& F ask turtles [ setxy random-xcor random-ycor ]% E& g- R% t. q; L9 P# W; q J0 x" t
end' x+ J2 i' K8 _+ E$ K
to eat-grass
5 x& L* f8 J f8 P/ M, x: x ask turtles [
W) i* P! x+ ]: W2 |; H7 o if pcolor = green [' V8 S2 W( B1 c0 s
set pcolor black4 G8 p/ q3 h$ H2 `7 j
set energy (energy + 10), P: B, U2 o1 [3 `: c o9 r8 l8 P
]
! V7 D/ U. Q; b ifelse show-energy?
2 [8 W3 m% v: U! y) k0 t- ^8 d [ set label energy ]/ D3 z2 T& @* m* s6 v( N) _
[ set label "" ]
- [* d; A8 V" ` ]
?: G1 z/ I) Mend
2 B. z# [3 j) ^8 bto reproduce
2 L. `5 g9 `: r! s p( n ask turtles [
& I/ R) O/ u4 M if energy > 50 [% F4 w1 Q5 K5 P! |: M' }, F1 b
set energy energy - 50+ N8 y0 {3 b1 H. Q
hatch 1 [ set energy 50 ]9 a: c6 w" G. Q" j* g
]
2 A8 u( }6 h0 P9 G! R; s* I ]- M. y* H( B# s& y
end2 }! c2 f' }/ n0 C, l
to check-death
: ]2 y3 w0 w* |, L7 m; Z ask turtles [$ y3 ~& r! j% [5 d+ K. a
if energy <= 0 [ die ]: b5 y, N. t, g) Q. r% e+ Q
]
# M1 ? _, V+ P0 l! W- Y7 \end
( O; Y' W; S+ j. f( w% Oto regrow-grass; m! g6 e3 k; M) w' n
ask patches [
6 ~( U0 F4 P5 D' ~ T if random 100 < 3 [ set pcolor green ]; r& f- }% M9 [5 S' Y' W6 u
]
. \" N; |5 ]# B. oend/ L3 X; x- z. y* T0 l
to do-plots) s( T2 U; d* h. x
set-current-plot "Totals"0 ] F9 O l% B6 i& f, G, e' l
set-current-plot-pen "turtles"
6 ]1 f6 @0 J% r plot count turtles
8 j: I) f6 Z* _$ X set-current-plot-pen "grass"
' m5 K# _' S3 p" g) g' s$ ?" S plot count patches with [pcolor = green]
6 J% J. Q( ^# N2 rend
" A# Z7 r& g) |" m可是运行时提示no such plot: "Totals"
, I/ n% X0 Q" U- j5 verror while observer running SET-CURRENT-PLOT9 P; j8 ]9 V+ K% L7 t$ S7 W7 e9 |" }9 S
called by procedure DO-PLOTS* y4 k& [+ A& c S$ y Y- w
called by procedure SETUP
3 d' A5 Y% y( c* d0 c E called by 按钮 'setup'
* G# K8 U: C3 v- `% O. V8 H求大神解答啊 |