我编的程序如下turtles-own [energy]
# g1 y- A% Z/ q5 Z& X' h4 [to setup
' ]* _. E# X, p! ~" K, g clear-all
( V% o: }) L1 H4 d setup-patches; T" F* e/ Y: r- I6 n; Q: \& L/ l
create-turtles 1007 ]- a# `+ c" B: v
do-plots) A, @6 g3 u4 {& V
ask turtles [ setxy random-xcor random-ycor ]
* @2 M% N% U( zend2 D4 q0 N/ O+ k0 z
to go
% P! A' ]0 t( h8 P9 x) z move-turtles
4 K$ n) H0 @! p5 f+ X$ _3 P eat-grass
6 n5 o }+ u0 i+ H* d9 W reproduce
& e7 g+ \: a. E' n, E check-death6 E( ?' v2 O- J4 s
regrow-grass
2 a! Z! H" H5 G7 B3 @! i do-plots
: l# x( M0 s3 ~- x$ G$ Dend4 o4 U X2 b5 ^; K; ^% V2 W5 ~
to move-turtles4 g- O- _# J. b) V4 U, B1 {
ask turtles [3 M& W* q9 S, k9 h* U6 i
right random 360* Q4 w7 O9 s5 ?6 p5 @+ L
forward 1* C3 \# t0 s3 M) @: Q0 g% ^
set energy energy - 1
3 ^& s x* B6 H V$ ? O ]8 Z% ?. Y- f7 A8 S |
end4 R/ h; ?" U* U- Y7 @2 C
to setup-patches
" w" Q p/ S4 R, N4 V" W5 h ask patches [ set pcolor green ]* N Q2 e$ Y9 X+ W
end
% c5 O6 j" l+ t. fto setup-turtles
( w7 j" [7 d t" A$ s create-turtles 100/ l4 f& _& W& R/ i7 ^
ask turtles [ setxy random-xcor random-ycor ]+ `2 p$ l( |" g; J) C8 A
end
6 i' y) N7 } _9 W- R, |to eat-grass& M: q; o6 r4 `3 ^9 K0 ^( A
ask turtles [/ o1 \0 @% a( `6 {
if pcolor = green [
: S& _$ `8 @/ I! ~$ k0 q( W set pcolor black* Y$ \: V$ ~" b2 H
set energy (energy + 10)
9 I* M# @- }7 P1 v9 \; @- q7 T ], y# ^/ y. |' V7 X8 S( Q( L; m
ifelse show-energy?2 z* Q0 Q. ~4 t6 k3 X/ t; D
[ set label energy ]
- v- i9 ~, ], p& N6 i [ set label "" ]
6 \; N: N: V& R$ k ]
6 V# `% o' e/ O. {- V8 eend
0 J3 J% _ ?! P- kto reproduce
6 u0 M, {) V' E4 C, @! M# f ask turtles [
( l6 k# B" D5 p- i9 K1 y if energy > 50 [1 u; C* S( ^' k* w% g
set energy energy - 50
+ @# }% g/ ^4 v) ~1 h; ^& y hatch 1 [ set energy 50 ]+ s4 O' g: v# T Z' {! h
]
* m; ~+ r( G. f6 ^! A! |" S ]
5 S% `+ ~5 Q ^) cend. {: |: w6 M. m! `. z4 U
to check-death8 q: P- j6 T5 f' R9 y
ask turtles [
/ Z# z% E @- K8 N ` if energy <= 0 [ die ]
" a* `2 } o k7 c2 c. O ]2 b2 B4 }5 {# P# [
end
8 X- _( o7 D1 I$ T. Y( Y S7 xto regrow-grass
4 s- [; u$ B' p0 M) Y% h, ~ ask patches [
: O) A3 e; z# v9 U if random 100 < 3 [ set pcolor green ]# D* g7 M& ^1 K5 @5 b# v
]( B2 v1 M% J. |7 @: l
end
" Z" ^4 y& t" v7 z: H) t* R uto do-plots9 c9 \5 h. p! y: d$ t4 \% V
set-current-plot "Totals"+ v% e: c. P, |: C
set-current-plot-pen "turtles"6 _7 y7 x6 x, R% w* ^
plot count turtles6 |' x; ~! g7 E* d
set-current-plot-pen "grass"
& K2 k) W2 a. j4 L8 T: k, ? plot count patches with [pcolor = green]
& k; W5 f$ w" w/ Uend
) [. l1 w# R3 }可是运行时提示no such plot: "Totals"
4 O: [6 b: W! ]0 ~) X: ierror while observer running SET-CURRENT-PLOT* R( q4 k( k# t. }* b
called by procedure DO-PLOTS2 H2 P0 y: S7 Z/ q1 Q: D
called by procedure SETUP$ t4 b5 A& D% T& k3 i3 x
called by 按钮 'setup' `6 F. [+ v+ ^% S7 S4 Q# d
求大神解答啊 |