我编的程序如下turtles-own [energy]# I: ~5 {7 p- V ?, o: e
to setup3 c# r! l w$ N0 K" w) t4 o$ ^% r
clear-all
i+ k. ?6 L) j3 T1 w- ^ setup-patches! t1 S) y2 }) K
create-turtles 100& r9 C' w' m8 K. z! d6 K
do-plots
/ \3 p6 M3 K9 E ask turtles [ setxy random-xcor random-ycor ]7 n7 Y. r* a: e+ a* n
end, Z2 j' \! C: O& l& w F: y
to go: {0 k# \% ]4 P$ O4 G
move-turtles
# [; {( d$ ?1 n! r( y; @ eat-grass. g6 o% Y$ I G' q4 u
reproduce
' U0 s5 L* J2 @/ t) x) \ check-death0 M, ?+ O- f6 o9 r; m( ^3 w
regrow-grass) X/ X3 m! [* I8 {1 i2 f
do-plots
/ f' M6 ~, w2 j6 pend
* E8 ?! Z4 w ?0 R+ n( kto move-turtles/ t% T3 S! e5 @+ `3 i8 k
ask turtles [
& I9 V0 a6 X) t7 ^, T, @ right random 360. G2 e+ ~. K9 s
forward 1
. V: |1 k, v6 b; h1 o& F set energy energy - 16 l7 @5 n4 \) W% j+ `( {, P
]
' c# P5 e1 Q, p1 f( K0 `+ qend
% E$ r& [5 \/ B6 s1 @: B; n& }to setup-patches( [* ~- ~ I7 e. f7 R" }! z# }
ask patches [ set pcolor green ]
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to setup-turtles
$ q4 B$ W4 C+ d2 Q' u, d P* N create-turtles 100- t' f X& N: Y) Q9 \
ask turtles [ setxy random-xcor random-ycor ]( L' n9 ]4 @$ ?" ^3 ^* j& O
end% e/ g( t9 o5 O" W
to eat-grass
) p0 ? b& [4 ~/ p; j5 X. | ask turtles [
+ G9 Q6 t. [( L if pcolor = green [ M( }/ Z, X: h, L( T
set pcolor black
1 L# s9 m! z% N" I6 ~) Z s: `7 P set energy (energy + 10)
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ifelse show-energy?
2 x# D7 L3 Z# W" K! r s! z [ set label energy ]0 i; t4 t: @' N8 r. Z
[ set label "" ]* q; u* o" F& y& F3 ?
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end) V" s" ^ l. P4 p6 o
to reproduce' {- B5 t/ `' l# p0 C1 s1 r
ask turtles [# l; I, D& `- O1 ?
if energy > 50 [
5 U: ?0 t5 F8 R" h8 w7 K% h set energy energy - 506 i( n1 g* N4 w; e3 s* L
hatch 1 [ set energy 50 ]! C7 E4 c e5 N; w! f: E2 P2 ~
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]' Q' y! H4 {) k6 d9 Z
end
# M& X, ^ G8 B# T* V3 z9 Z7 kto check-death( x r9 q; [! n! m
ask turtles [
6 z( Q% O' P0 l I) I/ e0 X5 c if energy <= 0 [ die ]
( d J7 ]# c4 `4 T9 N0 H ]. q' E6 ^0 ~ N: h/ `$ L
end. v3 `' i5 d( @% s9 B! i% l
to regrow-grass. \; A7 K+ p. V1 S% U
ask patches [
4 z9 b5 p; x, J: g# i5 q6 L" Z5 U3 F if random 100 < 3 [ set pcolor green ]
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end8 k' s7 l8 X* Q; ]: k
to do-plots$ r* a, j# h- v( K! T
set-current-plot "Totals"" m/ g2 Q3 \* N; c9 G" Z5 T! I$ M
set-current-plot-pen "turtles"
+ m% L. m1 x2 U: @8 b plot count turtles
6 x; C1 W7 k/ f7 B* K9 r8 s set-current-plot-pen "grass"
8 x! Y& G9 r1 ?5 ?0 j6 k plot count patches with [pcolor = green]$ B* x, X7 W; L2 k
end1 O& C) v+ k- N8 e7 l
可是运行时提示no such plot: "Totals"
$ ^9 A6 b% b/ a0 Y# ~) f3 Y" Herror while observer running SET-CURRENT-PLOT, d, w( m. f4 F$ z) k5 v" V
called by procedure DO-PLOTS
2 z: q4 c# C, M$ {: Y8 l called by procedure SETUP. o9 K) [4 j/ g/ s- F) t; X
called by 按钮 'setup'
6 d+ A& O8 t0 H a! e W3 l求大神解答啊 |