我编的程序如下turtles-own [energy]( P7 ]- i6 ^/ s+ H# M5 q! Q: f
to setup0 _! Y. t& u6 l. ]0 i/ {$ ?# p
clear-all) o3 G9 ?$ s z1 r; m
setup-patches
1 |6 i5 p- I/ S' y. g7 j/ f create-turtles 100
" D2 u# F6 M: l( D do-plots
`3 _, Z4 l$ B ask turtles [ setxy random-xcor random-ycor ]
2 \- f. n3 P9 z; \7 M" ]6 U& B' uend
0 T ^) s4 [: `# lto go# S A. P8 A& n# k. H$ h8 \% d
move-turtles
5 c" a5 s! s1 g* u/ R+ n" Y& _" [ eat-grass& l; o4 x6 p/ @
reproduce0 g7 b% q& H( D2 R" J5 T3 d I
check-death& z% K$ f3 g S% m5 ~
regrow-grass
" k% W! [2 G) a g, _ do-plots$ o4 U* x# j( ~* I
end1 D; E+ h0 e1 T2 V. @2 w
to move-turtles
- X9 C8 z) e, ]9 N, p ask turtles [
6 [! x# z+ g" {2 d- \8 H right random 360
) H: R7 }6 S: Y: p forward 18 ^; F4 X8 T: V" m& Z, E
set energy energy - 14 d5 f: o7 m9 [( i
]4 D$ c7 s2 c0 ]) z M; Z
end' u: G3 g) O# h8 y, J$ W3 Y
to setup-patches$ Z4 j1 O/ j4 l
ask patches [ set pcolor green ]
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to setup-turtles
6 e7 L, {; ^" z create-turtles 1009 q) Y* t( d" K+ q8 h0 |0 G* |
ask turtles [ setxy random-xcor random-ycor ]
8 K( n/ o I; S0 v( [5 w; v7 Hend
) \2 P) O: ~; L* v6 A j6 O9 lto eat-grass$ y& I& E; A1 R3 i8 n
ask turtles [
/ G/ s5 W2 ^2 Z. ~; |# c8 B if pcolor = green [# z. s* r7 A3 N3 e: k$ K5 F
set pcolor black
3 O3 a* V5 u* x) U0 _) @' B y set energy (energy + 10)
& y) J( u, _% l) A: _0 u ]
$ G" T7 a/ I; R% L9 ]4 e ifelse show-energy?
" k1 l9 _' m# T5 ~ [ set label energy ]
' m" P& @ d, [) \ _( r) ~ [ set label "" ]
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end
' D4 z: h( u& r5 ?( w- J, A* nto reproduce
: {, E; q/ h0 f! d' \/ U ask turtles [
7 R5 u3 T6 E7 M5 p7 q if energy > 50 [* ?/ L4 Z, p& a/ Y) n8 X
set energy energy - 50
' V N$ |( ]# ]+ \9 [% L hatch 1 [ set energy 50 ]
- _, F: y0 M3 S: L ]
5 F/ R) I- n; I! G& Y1 m" H0 ` ]
/ Y# p9 j/ q+ R6 o. @end
' j, i% _ r+ N& {- t6 J* N- h6 cto check-death9 [, ?# }- n- j& ?) I' ^
ask turtles [
9 I& g1 A- ?) F- J. _' T! X if energy <= 0 [ die ]
- I* D, Z) ]8 E$ t; t ]. Z; U/ f) |1 L: U/ ^* a; Y
end: Y+ c. k A3 A
to regrow-grass9 m% ]+ t& b" o: C3 V2 }0 Q
ask patches [# x7 H; j% [* t% Q& T6 a
if random 100 < 3 [ set pcolor green ]3 S% _8 u( z- _" J
]& a6 \1 i7 ^: y
end
- D6 b* w8 o+ d3 }* Eto do-plots
- q4 h' S+ {; o6 c c2 w set-current-plot "Totals"
& \5 W) g; j5 {2 b: H6 c4 F8 \: D set-current-plot-pen "turtles"
' s, M$ Y8 x4 ^0 U7 y, g plot count turtles1 R4 G0 q6 u6 {, f
set-current-plot-pen "grass"
4 z6 b+ u1 g$ |! w+ n: ?) g+ w" v plot count patches with [pcolor = green]
4 F9 V( i4 ~- H \. O) Uend
8 r, u0 P) q$ j7 n( Y可是运行时提示no such plot: "Totals"
9 R. J" O" [1 Jerror while observer running SET-CURRENT-PLOT
6 [7 [8 t2 v+ l called by procedure DO-PLOTS
% ~ U7 Y# I: Y: o+ T called by procedure SETUP/ A/ k4 L4 b8 ^# L" Z( O
called by 按钮 'setup') a' ?+ \! T' ]5 {4 Y4 k9 v
求大神解答啊 |