我编的程序如下turtles-own [energy]
# D$ {/ [7 d0 f5 {1 G# Rto setup
" `2 U) T9 _4 b* ^ clear-all. \- Z. E v3 [; l: ?/ ]- U0 \; a3 B
setup-patches
$ o: F% H2 a& \" g5 o/ g create-turtles 100) n5 S# @0 C% @3 p8 l! N
do-plots
2 p. y5 ]8 P7 v$ R" }% f4 J ask turtles [ setxy random-xcor random-ycor ]/ ~2 Y9 Z' Y- a1 m- r
end
E9 g9 E V, v+ E. N* Cto go2 T& m( t* T# C# M' H2 o4 e7 s3 N- S
move-turtles: A9 a, y$ {1 ~1 u& E* j6 T- \
eat-grass, D. c9 Q( f9 h! I
reproduce" y- A' D) h6 ]
check-death; f! J, @! Z& ^7 f8 x
regrow-grass
9 H2 s$ t+ [- s do-plots+ v' N y+ c" ^$ H- F
end
4 q! u3 i5 @/ Oto move-turtles- y }; o! p, l0 S W0 W
ask turtles [
' ~/ q/ u# v+ H; r5 x right random 3606 Z! p# k1 p% B* p' ]2 j* Q3 |
forward 1/ g w3 X* b: {. h) q, d: k
set energy energy - 17 n* B% s9 S$ D2 r! {& C0 Q- E
]1 n6 r8 ?0 L( ~; T) h% W/ l- O' \' j
end! P; d' x5 r2 i8 P5 ]) x
to setup-patches
* A! E- r F+ z1 c8 b! v" p ask patches [ set pcolor green ]
+ J% Q& t M$ Q( S: {end
_8 D' W' n6 o2 V& tto setup-turtles& s9 z# [$ b. |5 V) u0 Z
create-turtles 100
4 X; U( e2 Z' s ask turtles [ setxy random-xcor random-ycor ]
( B# i2 c2 k5 I& E! gend+ R8 _/ F! s0 j: P. P* q
to eat-grass: b% Q8 X$ V: w, P: H
ask turtles [
7 W+ M- a4 `* w7 l' h if pcolor = green [
5 x9 a* V( _7 H4 _" u4 a' P set pcolor black
A' I, P- `1 g set energy (energy + 10)4 F% w5 [& \6 K& `$ P, _$ |9 B
]
# ?) y& u1 N5 c2 O X1 \ ifelse show-energy?2 {# c" X& v) ?3 U Y0 n. x& D( u
[ set label energy ]
) |) _' q2 \5 @5 F [ set label "" ]
# J+ N5 p1 F3 t* m ]
9 @3 |6 B; ^( M; M0 n0 {' G# aend* ~1 y9 S6 G0 G; E* ?
to reproduce
8 e& G2 J# I/ t) m ask turtles [2 O- a4 y# n& r2 a3 p
if energy > 50 [! I( x: x1 G" h2 \1 l. |( w" \
set energy energy - 502 Q4 n) G0 L0 n0 v$ @
hatch 1 [ set energy 50 ]
3 m1 j- ?8 ]9 N* \ c" ?, E ]
9 N: Z# T( ~" @/ d) [ ]
. X3 @- D2 n6 _. P+ g/ E# c8 Dend
! ]5 M" e$ X# Q& x4 c* cto check-death# U _# l6 b. A7 ~& w$ A
ask turtles [6 }% _6 K/ h* k; x; q) p
if energy <= 0 [ die ]
" J7 N; [9 `* Q9 K2 e) E- | ], p, f1 t2 P3 h8 Z% S
end0 m' K- @, l/ o9 ~
to regrow-grass6 y) M: `5 @" K6 z" q
ask patches [' L% e9 M% T5 N. \
if random 100 < 3 [ set pcolor green ]8 g: ^' M7 ]+ {8 F
]( F1 Q3 W7 U& G
end
( v: f( x. z# B2 ~+ Bto do-plots
8 I: e6 l9 v, |' C) K2 F# E0 H0 u set-current-plot "Totals"
2 P& q( O) m5 ~6 |0 ^8 Z& h3 b! z, z t set-current-plot-pen "turtles"/ T7 c2 A$ f% p3 h
plot count turtles
3 O x. C9 `1 B9 y! R5 L set-current-plot-pen "grass"
% i+ M7 A" H' _1 V! b9 Y plot count patches with [pcolor = green]- K* s% b: f3 e( M1 R! h$ a
end
& a4 ~% w3 N6 z0 C; \) g8 U' ?/ O$ l3 g可是运行时提示no such plot: "Totals"( a; c. x$ e! P' Q: [" r' y4 H
error while observer running SET-CURRENT-PLOT3 N+ K) P- ?, H$ p) j
called by procedure DO-PLOTS
3 F f) ^" K( N* C7 f, m* I! L3 x called by procedure SETUP
9 G' e5 x8 j5 y [. p- ^/ w5 x called by 按钮 'setup') Y8 f/ F0 w. q4 F+ m
求大神解答啊 |