我编的程序如下turtles-own [energy]7 K/ Q8 m' I' u' p* w1 d+ ?
to setup
* \1 M) E/ W& ]. J clear-all& L5 A( H0 [/ s! [: X {
setup-patches2 P8 P; U. h* ^* g8 d% p
create-turtles 100' ?' z8 R& q4 h ~1 o& l2 `/ K- F
do-plots. f" @* N/ H9 L$ I: V K
ask turtles [ setxy random-xcor random-ycor ]* o, i7 ?2 s) L
end$ w" i/ X [4 s" {; h @5 D& @8 C
to go# K; C7 L3 C. g! j1 P* z" }
move-turtles
; D) g: X" X! |* H eat-grass
4 _! b$ W0 o) t! U Y reproduce
7 A6 y0 ^1 @$ {! e; W" T' S& ` check-death. C" N- J2 v0 p
regrow-grass
" I- J1 N7 w) }1 {' O4 } do-plots
* b, ^1 h1 M. Y2 }end/ B8 \; [2 @0 S' J
to move-turtles
* x. u6 t' U$ M- s0 A) w) c ask turtles [
2 L' d6 K: m% [7 I) Y' H right random 3603 n- \: T# w: m& }) J9 _. `
forward 1" o* o, f0 p4 L7 {% }
set energy energy - 1
; Y$ q6 S* E5 v8 E ]
$ [; x p% m: O0 q9 j2 h% aend
! a. S( A3 X0 O$ c3 M: Cto setup-patches
( ~, e: h0 ?* k ask patches [ set pcolor green ]
) x! j, \, A0 [end3 S3 a5 s- R4 ?. P
to setup-turtles
* d! R' e# [- @: w: y create-turtles 100( v0 I; b- [6 G! l/ r2 w. s- Q
ask turtles [ setxy random-xcor random-ycor ]
7 Y2 l4 c0 p0 \; z2 }- Cend C* p( @& x/ n" w
to eat-grass
9 S3 H2 x1 i9 X$ @+ G& T" u0 N ask turtles [
2 |* q# E k* g: z! q4 B if pcolor = green [7 J, R4 f* R% |: E$ e
set pcolor black
, H4 ] r/ f" d1 \( C6 O! | set energy (energy + 10)& m) W! T" q# Z% c( {# w, w I
]1 X3 S: F# l* g# p
ifelse show-energy?- M3 w1 h7 w4 r1 O8 e5 C: l9 @5 }
[ set label energy ]
: h1 a2 p, c- D3 C( p' t [ set label "" ]9 f2 I) q3 _, |* l3 k
]: b. P* U. M7 F( m
end
& V, h- W2 U: X2 C+ _to reproduce
# B3 a+ N# P3 k* F# Z# c( q3 q1 C ask turtles [! X$ D8 \5 D$ O$ `. A* ^1 m. l3 J% O/ `+ v
if energy > 50 [: X! F& F, T& M# A, {
set energy energy - 50
; K8 S( a! d, K& f hatch 1 [ set energy 50 ]& t0 n5 x' ]- }1 T8 d, v, L
]
; ~! j/ O8 c5 _$ b' O S( t ]
0 x5 ?' h# {, V( c+ M+ B* }2 U1 x% Iend
& T& \& Y2 ?7 p1 k0 N* D/ P4 Cto check-death9 q5 A1 y( q; T$ g
ask turtles [
/ o" Y% [) X2 B8 X if energy <= 0 [ die ]
+ p8 B& }! q \' s: \9 |1 M ]: f9 ]) p3 K# ?$ S2 Q9 B" O
end
1 U' @3 X$ j, r! b# U; ~5 ^ ato regrow-grass
$ e% d) Y0 M; |1 W4 k" b3 K ask patches [
z, q# c) n h if random 100 < 3 [ set pcolor green ]
$ Y$ m( j, y% p0 @; E- Q* h& @% S ]- ^. \" `/ v' r; p9 u9 W
end& m7 \( y; P$ J( }% g
to do-plots( `2 ~+ [! H: ?3 F, ~
set-current-plot "Totals"
1 f- Q- h* d% c set-current-plot-pen "turtles"
0 P! `; b, T! L plot count turtles
( v! `. b! i# M- X2 H# `; k set-current-plot-pen "grass"4 G \) D, g$ Y5 R2 `0 r
plot count patches with [pcolor = green]: r2 A/ }1 c6 {. |) |
end4 G- Z( n- _/ I/ L9 O& F p
可是运行时提示no such plot: "Totals"5 Y, x E$ Y0 G; t, s* C$ ^
error while observer running SET-CURRENT-PLOT
+ t# M: q3 ]9 x8 Y @ called by procedure DO-PLOTS
, u& g9 c% b) Y1 b- o called by procedure SETUP, ~- w0 D q! p' d
called by 按钮 'setup'6 Y3 a6 Q! G( J/ `( g4 i5 m- {4 t6 n% j
求大神解答啊 |