我编的程序如下turtles-own [energy]
, z: ?( l4 k: j+ a1 E8 N; U: rto setup; e8 Y( W, T, x: C
clear-all
9 m, L# G' N2 o, w/ b" u setup-patches
0 Q, }+ z1 V" d" C6 y create-turtles 100
9 i9 _$ o" m+ r- J- U$ L/ M+ ^3 J do-plots
$ w/ U0 {) {) ~% E# O ask turtles [ setxy random-xcor random-ycor ]. B* h4 d4 B+ F2 ]1 n6 Z
end) G$ I% B$ d* y/ f6 Q
to go5 O# e) h q: K) s. U- M; r
move-turtles) H0 i# E) N0 H7 v S0 s* |- U
eat-grass
, Q4 T! v! d( X W3 `. m reproduce+ p6 p( N) b2 Y3 r; U9 S- T
check-death2 o% V4 e) u" U- W3 W; F! w0 g
regrow-grass
7 e6 G+ o# S! l" B/ U6 @( @ do-plots
8 S) O; M4 {0 R, {0 q2 |+ g8 W Wend
# [* w, f& ` R& V$ kto move-turtles: L( T7 z/ P, f8 o
ask turtles [
q9 l% G6 i' [% x right random 3606 v+ O n# G; q/ b- y2 l A
forward 1, R9 Q7 o1 V4 {, o& Z$ |
set energy energy - 1
& k+ ~0 B G. T/ U' e9 ?6 [( f ]/ D( B. Y7 [1 B9 d, r7 i f
end
- s8 C1 t* @0 n( E. B' P+ ]( P9 dto setup-patches% C$ f' n; e: _$ g g
ask patches [ set pcolor green ]
4 N, ?- l3 K" F2 E Bend& f! i$ h) p& u7 t
to setup-turtles
8 ]# ~4 G1 [; r" }7 B0 H' i/ } create-turtles 100
% d) t1 o6 @/ @/ c! D! } ask turtles [ setxy random-xcor random-ycor ]
2 ]/ F3 h% f8 S; Q& l' k! C* wend
8 S+ x3 K2 _! F6 }3 U1 Lto eat-grass
' D, ^) K* t% C. o( y. i6 r ask turtles [" E1 a. f2 H t, a7 L; X: y) L ^( K
if pcolor = green [" R- S' |7 {: e/ @& x
set pcolor black
6 G- _" x4 U' p set energy (energy + 10)( F" z! B+ |1 ]6 q$ h
]
& l" v+ H! M. d' V8 M0 X ifelse show-energy?
. T& k* {; \! ~ [ set label energy ]
: b; x3 F/ c1 z n, l! `: m [ set label "" ]
! @- W: @. l/ |5 n8 @4 ~ ]
+ [3 K+ N! ^4 y1 C+ }, e. [end3 [: d3 Y: @7 x- K/ L
to reproduce! V2 q7 E2 B V, `9 Y% n! {
ask turtles [9 Z7 I# \! }$ d* ]
if energy > 50 [/ d2 c ~+ l1 d% f8 B% O4 |+ _4 w
set energy energy - 50
$ U; L* m6 O; u: W hatch 1 [ set energy 50 ]: C: C5 t# `% |# `9 H c1 e
], B n; d& [1 B
]
9 M4 P0 m4 i9 j, R! }1 }. aend
5 v( r3 @% l8 O5 V' [to check-death' X! l4 j: }+ @1 w
ask turtles [) I$ b5 I9 x7 R, s& N: O
if energy <= 0 [ die ]
9 o- o r- |6 Q% X8 r3 i ]
6 n$ ^8 y2 I w' ^end
& Q' h% Q. S& R& gto regrow-grass- F V- l# D* N/ G1 }( B( L+ h
ask patches [
3 c8 ^1 w- }' o; w$ c if random 100 < 3 [ set pcolor green ]
9 m. ~6 r( N% H( V4 w/ O2 k ]
9 ]2 K6 z, l- G5 e" O5 \end
/ w) t3 c" b/ u% a" _to do-plots
: A8 F# F% R% z9 v7 {0 ` set-current-plot "Totals"3 B# _' t8 g8 v- A
set-current-plot-pen "turtles"8 R: n7 _' a7 e* ^ p h
plot count turtles
- @. ~! }6 w. s% Y9 _7 n set-current-plot-pen "grass"
. D* B) s" [$ s8 { plot count patches with [pcolor = green]
# f" n& v6 p% kend* J% U/ Y2 Z' q5 l( e a
可是运行时提示no such plot: "Totals"
/ d( B1 ]2 y7 T8 U W" ^error while observer running SET-CURRENT-PLOT4 C$ a* o& T1 O* ^
called by procedure DO-PLOTS* q4 D0 s) d8 h2 T
called by procedure SETUP: U7 z1 }9 M) x1 c% l
called by 按钮 'setup'1 G4 W& V- [! f* `8 Z/ {' T, z
求大神解答啊 |